EB3C Relay Barriers
Input contacts can be used in any explosive gas and Zone 0/Class I Div. 1 areas.
Explosion
protection
Relay Barrier:
[Exia] II C
Switch (EB9Z-A): Exia II CT6
Switch (EB9Z-A1): Exia II BT6
••IEC60079 compliant.
••Wide variety of models ranging from 1-circuit to 16 circuit
types.
••8- and 16-channel are available in common wiring, ideal for
connection to PLCs. 16-circuit also available with a connector.
••No grounding required.
••IDEC’s original spring-up terminal minimizes wiring time.
••35-mm-wide DIN rail mounting or direct screw mounting.
••Global usage
IECEx
USA: FM, UL
Europe: CE marking, ATEX
China: CQST
Korea: KCS
Taiwan TS
Japan: TIIS
••Ship class: NK (Japan), KR (Korea)
Connector Type
Relay Barriers
Power
Voltage
Connection to
Non-intrinsically
Safe Circuit
Input Wiring Method
Number of
Channels
Output
Separate/Common
Wiring Compatible
Relay
Common Wiring Only
100 to 240V AC
Separate/Common
Wiring Compatible
Transistor (Sink/Source)
Transistor (Sink)
Common Wiring Only
Transistor (Source)
Screw Terminal
Separate/Common
Wiring Compatible
Relay
Common Wiring Only
24V DC
Separate/Common
Wiring Compatible
Transistor (Sink/Source)
Sink
Common Wiring Only
Connector
T-4
Transistor
Source
Sink
Source
1
2
3
5
6
8
10
8
1
2
3
5
6
8
10
8
16
8
16
1
2
3
5
6
8
10
8
16
1
2
3
5
6
8
10
8
16
8
16
16
Part No.
EB3C-R01AN
EB3C-R02AN
EB3C-R03AN
EB3C-R05AN
EB3C-R06AN
EB3C-R08AN
EB3C-R10AN
EB3C-R08CAN
EB3C-T01AN
EB3C-T02AN
EB3C-T03AN
EB3C-T05AN
EB3C-T06AN
EB3C-T08AN
EB3C-T10AN
EB3C-T08CKAN
EB3C-T16CKAN
EB3C-T08CSAN
EB3C-T16CSAN
EB3C-R01DN
EB3C-R02DN
EB3C-R03DN
EB3C-R05DN
EB3C-R06DN
EB3C-R08DN
EB3C-R10DN
EB3C-R08CDN
EB3C-R16CDN
EB3C-T01DN
EB3C-T02DN
EB3C-T03DN
EB3C-T05DN
EB3C-T06DN
EB3C-T08DN
EB3C-T10DN
EB3C-T08CKDN
EB3C-T16CKDN
EB3C-T08CSDN
EB3C-T16CSDN
EB3C-T16CKD-CN
EB3C-T16CSD-CN
Weight (g)
150
180
190
260
270
300
380
280
140
170
180
250
260
320
340
260
260
260
260
130
170
180
250
260
260
360
270
390
120
160
170
240
250
250
320
250
350
250
350
330
330
EB3C Relay Barriers
Accessories
Name
Part No.
BAA1000
BAP1000
BNL6
EB9Z-N1
DIN Rail
End Clip
Static Electricity Caution Plate
Ordering No.
BAA1000PN10
BAP1000PN10
BNL6PN10
EB9Z-N1PN10
Explosion-Protection and Electrical
Specifications
Explosion Protection
Intrinsic safety type
Degree of Protection
IP20 (IEC60529)
Safe indoor place
(safe area: non-hazardous area)
For zone 0, 1, 2 hazardous areas
Installation Location
Relay Barrier
Switch
Non-intrinsically Safe Circuit
Maximum Voltage (Um)
Intrinsically Safe Circuits
227.2 mA
750 mW
Allowable Wiring Resistance (Rw)
300Ω
600/(N+1)Ω
(N = number of
common
channels)
–
16
Relay Output
Contact Resistance
50 mΩ maximum (initial value)
Turn ON Time
Turn OFF Time
12 ms maximum (rated voltage)
10 ms maximum (rated voltage)
20,000,000 operations minimum
(at 18,000 operations/hour, without
load)
100,000 operations minimum
(at 1,800 operations/hour, rated load)
None
24V DC
30V DC
100 mA (connector type: 15 mA)
0.1 mA maximum
1.5 V maximum
33V (1W)
0.5A maximum (1 sec)
0.1 ms maximum (resistive load)
0.4 ms (typical) (resistive load)
None
Inductive Load
Mechanical Life
Electrical Life
Transistor Output
0.6 mH (0.425 mH)
Minimum Applicable Load
Resistive Load
Short-circuit Protection
Rated Voltage
Maximum Voltage
Maximum Current
Leakage Current
Voltage Drop
Clamping Voltage
Inrush Current
Turn ON Time
Turn OFF Time
Short-circuit Protection
FM
UL
PTB (ATEX)
CQST
KCS
TIIS
490 nF (365 nF)
1NO
250V AC, 125V DC
3A (common terminal: 8A)
AC: 750 VA, DC: 72W
AC: 750 VA (cos ø = 0.3 to 0.4)
DC: 48W (L/R = 7 ms)
250V AC 3A, 24V DC 3A
250V AC 3A (cos ø = 0.3 to 0.4)
24V DC 2A (L/R = 7 ms)
0.1V DC, 0.1 mA (reference value)
Rated
Load
Certification
Organization
PTB (IECEx)
Rated Operating Voltage
Rated Operating Current
Maximum Output Voltage (Uo)
Maximum Output Current (lo)
Maximum Output Power (Po)
Maximum External
470 nF (470 nF)
Capacitance (Co)
(Note 1)
Maximum External Inductance (Lo) 87.5 mH (87.5
(Note 2) mH)
Maximum Channels per
Common Line
Contact Configuration
Rated Insulation Voltage (Ui)
Thermal Current (lth)
Resistive Load
Contact
Allowable
Inductive Load
Power
Non-intrinsically Safe Circuits
16-channel
Common Wiring
Description
Aluminum (1m long)
Steel (1m long)
For fastening EB3C units on the DIN rail.
Polyester 20 (W) x 6 (H) mm
Certification No.
250V AC
1-channel
Separate Wiring
12V DC ±10%
10 mA DC ±20%
13.2V DC
14.2 mA
46.9 mW
Wiring Method
Package Quantity
10
10
10
10
NK
KR
Explosion Protection
Class I, II, III Div. 1
Group A, B, C, D, E, F, G
Class I, Zone 0 AEx [ia] II C
Class I, II, III, Div. 1
Group A, B, C, D, E, F, G
Class I, Zone 0 AEx [ia] II C
[Exia] II C: Gas, Vapour
[Exia] III C: Dust
[Exia] II C: Gas, Vapour
[Exia] III C: Dust
[Exia Ga] II C
[Exia] II C
Relay barrier:
[Exia] II C
Switch (EB9Z-A): Exia II CT6
Switch (EB9Z-A1): Exia II BT6
[Exia] II C
[Exia] II C
Certification No.
3047250
Switches &
Pilot Lights
Flush
Silhouette
Switches
Emergency
Stop
Switches
Control
Stations
Display
Lights
E234997
PTB09 ATEX2046
IECEx PTB10.0015
CNEx14.0047
14-AV4B0-0373
TC20539
TC15758
TC15961
Type Test No. 13T606
TYK17821-EL003
Operator
Interfaces
PLCs
Softwares
Relays
Note: For details about switches, see “Switch Explosion-Protection
Specifications” on page T-6 and “3. Switches in the Hazardous
Area” on page T-10.
Sockets
General Specifications
Timers
Power Voltage
Rated Power Voltage
Allowable Voltage
Range
AC Power
100 to 240V AC
24V DC
DC Power
–15 to +10%
±10%
50/60 Hz (allowable range:
—
47 to 63 Hz)
10A (100V AC)
Inrush Current
10A
20A (200V AC)
Between intrinsically safe circuit and non-intrinsically
safe circuit: 1526.4V AC
Dielectric Strength
Between AC power and output terminal: 1500V AC
(1 minute, 1 mA)
Between DC power and transistor output terminal:
1000V AC (screw terminal type only)
Operating Temperature –20 to +60°C (no freezing)
Storage Temperature
–20 to +60°C (no freezing)
Operating Humidity
45 to 85% RH (no condensation)
Atmosphere
800 to 1100 hPa
Pollution Degree
2 (IEC60664)
10 MΩ minimum (500V DC megger, between the same
Insulation Resistance
poles as the dielectric strength)
Panel mounting: 10 to 55 Hz, amplitude 0.75 mm
Vibration Resistance
(damage limits)
DIN rail mounting: 10 to 55 Hz, amplitude 0.35 mm
Panel mounting: 500 m/s2 (3 times each on X, Y, Z)
Shock Resistance
(damage limits)
DIN rail mounting: 300 m/s2 (3 times each on X, Y, Z)
Terminal Style
M3 screw terminal
Mounting
35-mm-wide DIN rail or panel mounting (M4 screw)
Power Consumption
9.6 VA (EB3C-R10AN at 200V AC)
(approx.)
4.8W (EB3C-R16CDN at 24V DC)
Rated Frequency
Terminal
Blocks
Circuit
Protectors
Power
Supplies
Sensors
Ex-proof
Control
Boxes
Barriers
LEDs
Safety
Products
Information
Note: Values in ( ) are those approved by TIIS (Technology Institution of
Industrial Safety, Japan).
T-5
EB3C Relay Barriers
Switch Explosion-Protection Specifications (Japan only)
Simple apparatuses in accordance with relevant standards of each country can be installed in the hazardous area and connected to the
EB3C located in the safe area. In Japan, any switches, though regarded as simple apparatuses, must be certified for explosion-proof
devices. EB9Z-A and EB9Z-A1 are IDEC’s generic Part No. of any single apparatuses certified by TIIS for use with the EB3C, therefore
simple apparatuses with specifications shown below can be used as those approved by the Japanese explosion-proof certification.
Switch Part No.
Explosion Proof (Note 1)
Operating Temperature
Operating Humidity
Degree of Protection
Dielectric Strength
EB9Z-A
EB9Z-A1
Exia II CT6
Exia II BT6
–20 to +60°C (no freezing)
45 to 85% RH (no condensation)
IP20
500V AC, 1 mA
16-channel Common Wiring
1-channel Separate Wiring
Maximum input voltage (Ui): 13.2V
Maximum input voltage (Ui): 13.2V
Maximum input current (Ii): 227.2 mA
Maximum input current (Ii): 14.2 mA
Maximum input power (Pi): 750 mW
Maximum input power (Pi): 46.9 mW
Internal capacitance (Ci): ≤ 32 nF
Internal capacitance (Ci): ≤ 2 nF
Internal inductance (Li):
≤ 80 µH
Internal inductance (Li):
≤ 5 µH
Metallic: Magnesium content must be 7.5% or less (steel and aluminum are acceptable)
Intrinsic Safety Ratings and
Parameters
Caution
Plastic: Switch operator exposed area
IIC: 20 cm2 maximum
IIB: 100 cm2 maximum
When the switch has a wider exposed area, attach a
caution label as shown at right.
Enclosure Material
To prevent electrostatic
charges, do not rub the
switch surface during
operation. Use a soft
cloth dipped with water
for cleaning.
Caution Label Example
Contact rating:
Ui, Ii minimum
Contact resistance:
0.5Ω maximum
Cross sectional area of wire: 0.000962 mm2 minimum
Printed circuit board:
Thickness 0.5 mm minimum
Copper foil width 0.15 mm minimum
Thickness 18 µm minimum one/both side(s)
A resistor to prevent contact welding and an LED can be connected to 1-channel separate wiring circuits.
Consult IDEC for details.
Switch Ratings (Note 2)
Note 1: See “Precautions for Operation” on page T-10.
Note 2: For details, see “3. Switches in the Hazardous Area” on page T-10.
Internal Circuit Block Diagram
AC Power, Relay Output
DC Power, Transistor Output
Connector Wiring, Sink Output
Hazardous Area
• • • • • • • •
P1 N1 P2 N2 P3 N3
P1 N1 P2 N2 P3 N3
Yellow
Green
Yellow
Yellow
Green
Yellow
Yellow
Green
~
~
~
~
L
Yellow
P1 • • • • P16 N1
+
N A1 C1 A2 C2 A3 C3
Yellow
N2
Safe Area
(Non-hazardous Area)
Yellow
~
~
~
–
A1 C1 A2 C2 A3 C3
+
–
A1 • • • • A16 C1 C2
Dimensions
Connector Type
EB3C-T16C-CN
M3
ø6
Applicable Crimping Terminal
Solid Wire
97
Mounting Hole Layout
6 to 8 mm
65
(4)
77.5
97
10
5.4 min.
Stripping the Wire End
4-M4
or
4-4.5 holes
6
T-6
3 max.
83.5
10
ø3.2 min.
6 max.
75
4- 4.5 hole
65
171.5
Stranded Wire (Ferrule)
6 to 8 mm
All dimensions in mm.
EB3C Relay Barriers
EB3C-∗03N
EB3C-∗02N
42
EB3C-∗06N
EB3C-∗05N
EB3C-∗08CN
65
Switches &
Pilot Lights
EB3C-∗10N
EB3C-∗08N
EB3C-∗16CN
110.5
77.5
171.5
ø4.4
Screw Terminal
EB3C-∗01N
Flush
Silhouette
Switches
65
61
75
Emergency
Stop
Switches
(4)
M3
ø6 hole
Display
Lights
77.5
Operator
Interfaces
PLCs
4
6
Control
Stations
10
10
10
10
10
Softwares
Mounting Hole Layout (Screw Mounting)
2-M4 tapped or
2-ø4.5 mounting holes
28
2-M4 tapped or
2-ø4.5 mounting holes
4-M4 tapped or
4-ø4.5 mounting holes
97
97
51
65
2-M4 tapped or
2-ø4.5 mounting holes
65
Relays
Sockets
Timers
Terminal
Blocks
External Wiring Examples
Circuit
Protectors
Transistor Output
(Ex.: EB3C-T06AN)
Transistor Sink Output
(Ex.: EB3C-T08CKDN)
Transistor Source Output
(Ex.: EB3C-T08CSDN)
Power
Supplies
P1 N1 P2 N2 P3 N3 P4 N4 P5 N5 P6 N6
Note: On the sink/source transistor output type,
terminals A can be used as a positive
common line.
Relay Output
(Ex.: EB3C-R06AN)
Load
Load
Load
Load
Ex-proof
Control
Boxes
Load
A1 A2 A3 A4 A5 A6 A7 A8 C1 C2
Load
24V DC
Sensors
Load
–
Load Power
24V DC
Load
Load
Load
Load
Load
24V DC
+
A1 A2 A3 A4 A5 A6 A7 A8 C1 C2
Load
Load
Power
24V DC
–
Load
+
Load
Load
Load
Load
Load
100 to
240V AC
A1 C1 A2 C2 A3 C3 A4 C4 A5 C5 A6 C6
Load
N
Load
L
P1 P2 P3 P4 P5 P6 P7 P8 N1 N2
Load
P1 P2 P3 P4 P5 P6 P7 P8 N1 N2
Load Power
24V DC
Barriers
LEDs
Relay Output Common Wiring
(Ex.: EB3C-R16CDN)
Safety
Products
P1 N1 P2 N2 P3 N3 P4 N4 P5 N5 P6 N6
P4
P5
P6
P7
P8
N1
N2
P9 P10 P11 P12 P13 P14 P15 P16 N3
N4
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
A9 A10 A11 A12 A13 A14 A15 A16 C3
C4
Information
Load
Load
Load
Load
Load
Load
Load
Load
Load
Load
Load
Load
24V DC
Load
Load
Load
Load
Load
Load
Load
–
Load
Power
AC/DC
Load
A1 C1 A2 C2 A3 C3 A4 C4 A5 C5 A6 C6
+
100 to
240V AC
P3
Load
N
P2
Load
L
P1
Load
Power
AC/DC
T-7
EB3C Relay Barriers
Connector Type Output Wiring Diagram
EB3C-T16CKD-CN (Sink)
Wiring Example with IDEC’s MicroSmart PLC Input Modules
CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16
A9 A10 A11 A12 A13 A14 A15 A16 NC NC
19
1
20
2
A8
C1
C2
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
+V
COM
A1
A2
A3
A4
A5
A6
A7
EB3C
+
An
–
COM
PLC
COM
Internal Circuit
Internal Circuit
+V (C1)
+
CHn
A1-A16
Input
I0-I15
COM (C2)
EB3C-T16CSD-CN (Source)
CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16
A9 A10 A11 A12 A13 A14 A15 A16 NC NC
19
1
20
2
A8
C1
C2
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
–V
COM
A1
A2
A3
A4
A5
A6
A7
EB3C
CHn
–
An
+
COM
PLC
EB3C-T16CSD-CN
FC4A-N16B3
Input
Terminal
Terminal Output
Input
Terminal
20
A1
I0
20
20
A1
I0
20
19
A9
I10
19
19
A9
I10
19
18
A2
I1
18
18
A2
I1
18
17
A10
I11
17
17
A10
I11
17
16
A3
I2
16
16
A3
I2
16
15
A11
I12
15
15
A11
I12
15
14
A4
I3
14
14
A4
I3
14
13
A12
I13
13
13
A12
I13
13
12
A5
I4
12
12
A5
I4
12
11
A13
I14
11
11
A13
I14
11
10
A6
I5
10
10
A6
I5
10
9
A14
I15
9
9
A14
I15
9
8
A7
I6
8
8
A7
I6
8
7
A15
I16
7
7
A15
I16
7
6
A8
I7
6
6
A8
I7
6
5
A16
I17
5
5
A16
I17
5
4
+V
COM
4
4
–V
COM
4
3
NC
COM
3
3
NC
COM
3
2
COM
NC
2
2
COM
NC
2
1
NC
NC
1
1
NC
NC
1
Input
I0-I15
Internal Circuit
Internal Circuit
A1-A16
FC4A-N16B3
Note: The wiring in dashed line does not affect the operation of the EB3C.
Applicable connector is IDEC’s JE1S-201.
Input power for PLC inputs is supplied by the EB3C, therefore the PLC
input does not need an external power supply.
COM (C2)
+
EB3C-T16CKD-CN
Terminal Output
COM
Wiring Example of Intrinsically Safe External Inputs
1. Common Wiring (Maximum 16 circuits)
P1
N1
P2
N2
P3
N3
P4
N4
P5
N5
P6
N6
L
N
A1
C1
A2
C2
A3
C3
A4
C4
A5
C5
A6
C6
N
N
N
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P1
N1
P2
N2
P3
N3
L
N
A1
C1
A2
C2
A3
C3
N
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
P1
N1
N2
L
N
A1
C1
C2
N
L
N
A1
P1
C1
N1
A2
P2
C2
N2
A3
P3
C3
N3
A4
P4
C4
N4
A5
P5
C5
N5
A6
P6
C6
N6
A7
P7
C7
N7
A8
P8
C8
N8
A9
P9
C9
N9
A10 P10
C10 N10
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P9
P10
P11
P12
P13
P14
P15
P16
N3
N4
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
A9
A10
A11
A12
A13
A14
A15
A16
C3
C4
All input lines are wired to a common line inside the intrinsically safe switch (one common line per intrinsically safe circuit).
N
N
N
N
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
P1
N1
P2
N2
P3
N3
P4
N4
P5
N5
P6
N6
L
N
A1
C1
A2
C2
A3
C3
A4
C4
A5
C5
A6
C6
N
L
N
A1
P1
C1
N1
A2
P2
C2
N2
A3
P3
C3
N3
A4
P4
C4
N4
A5
P5
C5
N5
A6
P6
C6
N6
A7
P7
C7
N7
A8
P8
C8
N8
A9
P9
C9
N9
A10 P10
C10 N10
P1
N1
P2
N2
P3
N3
P1
N1
N2
L
N
A1
C1
C2
N
L
N
A1
C1
A2
C2
A3
C3
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P9
P10
P11
P12
P13
P14
P15
P16
N3
N4
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
A9
A10
A11
A12
A13
A14
A15
A16
C3
C4
Some input lines are wired to a common line inside the intrinsically safe switches, while others are outside switches
(one common line per intrinsically safe circuit).
N
P1
N1
P2
N2
P3
N3
P4
N4
P5
N5
P6
N6
L
N
A1
C1
A2
C2
A3
C3
A4
C4
A5
C5
A6
C6
N
2. Separate Wiring
T-8
Each input line of the EB3C makes up one independent intrinsically safe circuit.
N
N
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P1
N1
P2
N2
P3
N3
L
N
A1
C1
A2
C2
A3
C3
N
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
P1
N1
N2
L
N
A1
C1
C2
N
L
N
A1
P1
C1
N1
A2
P2
C2
N2
A3
P3
C3
N3
A4
P4
C4
N4
A5
P5
C5
N5
A6
P6
C6
N6
A7
P7
C7
N7
A8
P8
C8
N8
A9
P9
C9
N9
A10 P10
C10 N10
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P9
P10
P11
P12
P13
P14
P15
P16
N3
N4
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
A9
A10
A11
A12
A13
A14
A15
A16
C3
C4
All input lines are wired to a common line outside the intrinsically safe switch (one common line per intrinsically safe circuit).
N
P1
N1
P2
N2
P3
N3
P4
N4
P5
N5
P6
N6
L
N
A1
C1
A2
C2
A3
C3
A4
C4
A5
C5
A6
C6
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P1
N1
P2
N2
P3
N3
L
N
A1
C1
A2
C2
A3
C3
N
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
P1
N1
N2
L
N
A1
C1
C2
N
N
L
N
A1
P1
C1
N1
A2
P2
C2
N2
A3
P3
C3
N3
A4
P4
C4
N4
A5
P5
C5
N5
A6
P6
C6
N6
A7
P7
C7
N7
A8
P8
C8
N8
A9
P9
C9
N9
A10 P10
C10 N10
P1
P2
P3
P4
P5
P6
P7
P8
N1
N2
P9
P10
P11
P12
P13
P14
P15
P16
N3
N4
L
N
A1
A2
A3
A4
A5
A6
A7
A8
C1
C2
A9
A10
A11
A12
A13
A14
A15
A16
C3
C4
N
EB3C Relay Barriers
N
N
Switches &
Pilot Lights
2. Separate Wiring
Each input line of the EB3C makes up one independent intrinsically safe circuit.
P1
N1
P2
N2
P3
N3
P1
N1
P2
N2
P3
N3
P4
N4
P5
N5
P6
N6
L
N
A1
C1
A2
C2
A3
C3
L
N
A1
C1
A2
C2
A3
C3
A4
C4
A5
C5
A6
C6
N
N
N
Diagram Symbols
Emergency
Stop
Switches
L
N
A1
P1
C1
N1
A2
P2
C2
N2
A3
P3
C3
N3
A4
P4
C4
N4
A5
P5
C5
N5
A6
P6
C6
N6
A7
P7
C7
N7
A8
P8
C8
N8
A9
P9
C9
N9
A10 P10
C10 N10
P1
N1
N2
L
N
A1
C1
C2
Flush
Silhouette
Switches
Control
Stations
N
Serial-Parallel Connection of Switches
Contacts in one switch
(EB9Z-A or EB9Z-A1)
Notes
• As shown in the diagram on the left, a required number of “contacts
in one switch” (3 contacts in the example at left) can be added to the
“contacts in one switch” connected to one input channel.
• Similarly, a required number of “contacts in one switch” can be added
to a common line connected to multiple input channels.
• The capacitance and inductance of the added “contacts in one
switch” must be included in the calculation of the wiring capacitance
and inductance in “Precautions for Operation, 5. Wiring for Intrinsic
Safety, (7)” on page T-11.
• In addition, a required number of contacts can be added in the
enclosure of “contacts in one switch.” In this case, however, do not
include the capacitance and inductance in the calculation of the
wiring capacitance and inductance on page T-11. Instead, make
sure that the internal capacitance (Ci) and internal inductance (Li) are
within the values shown in the table “Switch Explosion-Protection
Specifications (Japan only)” on page T-6.
L
N
A1
C1
C2
P1
N1
N2
One intrinsically safe circuit
(maximum 16 circuits)
No. of Poles
With Shield
I/O
Terminal
Cable
Without Shield
20
Cable with Crimping Terminal
Length (m)
Part No.
0.5
FC9Z-H050A20
1
FC9Z-H100A20
2
FC9Z-H200A20
3
FC9Z-H300A20
0.5
FC9Z-H050B20
1
FC9Z-H100B20
2
FC9Z-H200B20
3
FC9Z-H300B20
1
BX9Z-H100E4
2
BX9Z-H200E4
Operator
Interfaces
PLCs
Softwares
Relays
Sockets
Recommended Connector Cable for Connector Types
Description
Display
Lights
shape
Applicable Type
Timers
IDEC MicroSmart
I/O Module
Terminal
Blocks
Circuit
Protectors
IDEC MicroSmart
I/O Module
Power
Supplies
200
Screw Terminal
2
1
40-pin Cable for PLC
3
BX9Z-H300E4
1
BX9Z-H100L
2
BX9Z-H200L
3
BX9Z-H300L
Sensors
350
Connector B
10
0
Connector A
Mitsubishi A Series
Input Module
(positive common)
↓
EB3C-T16CKD-CN
Ex-proof
Control
Boxes
Barriers
FC9Z-HA, FC9Z-HB
Internal Connection
Fujitsu Connector
IDEC Connector
FCN-367J024-AU/F
JE1S-201
19
20
17
18
15
16
13
11
14
12
9
10
7
8
5
6
3
4
1
2
(Connecting Side)
(Connection Side)
IDEC Connector
IDECJE1S-20111
Connector
JE1S-201
BX9Z E4
Internal Connection
IDEC Connector
JE1S-201
IDEC Connector
JE1S-201
19
20
1
2
17
18
3
4
15
16
5
6
13
14
7
8
9
10
11
12
9
10
7
8
5
6
3
4
1
2
(Connecting Side)
(Connection Side)
11 12
13 14
15 16
17 18
19 20
BX9Z-HL Internal Connection
Fujitsu Connector
FCN-367J040-AU/F
B A
Y-shaped Compresion
Terminal
Y-shaped
Compresion
(Marking
Tube No.)Terminal
1
1
2
2
3
3
2
4
4
4
5
5
6
6
6
7
7
8
8
9
9
(Marking Tube No.)
1
3
5
7
9
11
13
15
17
19
8
10
12
Connector A
IDEC
JE1S-201
14
2
1
16
4
3
18
6
5
20
8
7
10 9
(Connecting Side)
LEDs
12 11
14 13
16 15
18 17
20 19
(Connecting Side)
Safety
Products
Information
Connector B
IDEC
JE1S-201
10 10
11 11
2
1
12 12
4
3
13 13
6
5
14 14
8
7
15 15
10 9
16 16
12 11
17 17
14 13
18 18
16 15
19 19
18 17
20 20
20 19
(Connecting Side)
(Connecting Side)
T-9
EB3C Relay Barriers
Precautions for Operation
1. Installation of EB3C Relay Barriers
(1) The EB3C can be installed in any direction.
3. Switches in the Hazardous Area
(For Japan application only)
(2) Install the EB3C relay barrier in a safe area (non-hazardous
area) in accordance with intrinsic safety ratings and param
eters. To avoid mechanical shocks, install the EB3C in an
enclosure which suppresses shocks.
(1) A switch contains the switch contact, enclosure, and
internal wiring. A switch contact refers to an ordinary
switching device which consists of contacts only, such as a
pushbutton switch. See below.
(3) When installing or wiring the EB3C, prevent
electromagnetic and electrostatic inductions in the
intrinsically safe circuit. Also prevent the intrinsically safe
circuits from contacting with another intrinsically safe circuit
and any other circuits.
Maintain at least 50 mm clearance, or provide a metallic
separating board between the intrinsically safe circuit and
non-intrinsically safety circuit. When providing a metallic
separating board, make sure that the board fits closely
to the enclosure (top, bottom, and both sides). Allowable
clearance between the enclosure and board is 1.5 mm at
the maximum.
The clearance of 50 mm between the intrinsically safe cir
cuit and non-intrinsically safe circuit may not be sufficient
when a motor circuit or high-voltage circuit is installed
nearby. In this case, provide a wider clearance between
the circuits referring to 5 (3) “Minimum Parallel Distance
between the Intrinsically Safe Circuit and Other Circuits.”
(4) In order to prevent contact between intrinsically safe
circuits and non-intrinsically safe circuits, mount EB3C
units with terminals arranged in the same direction.
Intrinsically Safe Circuit
EB3C
EB3C
EB3C
Control
Switches
Sensing
Switches
Push-pull Switches
Pushbutton, Foot, Trigger, Rocker, Grip
Twisting Switches
Rotary, Selector, Cam, Drum, Thumb
wheel
Lever and Slide
Switches
Toggle, Multidirectional, Wobble stick,
Lever, Slide switch
Displacement
Switches
Microswitch, Limit, Magnetic proximity,
Door, Reed, Mercury
Level Switches
Liquid level
Others
Pressure, Temperature
Note: For installation in hazardous areas and connection to the EB3C, use
switches which are certified, approved, or considered to be simple
apparatus in relevant standards in each country.
(2) When the switch has internal wiring or lead wire, make sure
that the values of internal inductance (Li) and capacitance
(Ci) are within the certified values.
(3) Enclose the switch contact’s bare live part in an enclosure
of IP20 or higher protection.
(4) Depending on the explosion-protection specifications
according to TIIS, the exposed area of plastic switch opera
tor is limited as follows:
• Exia II CT6 (EB9Z-A): 20 cm2 maximum
• Exia II BT6 (EB9Z-A1): 100 cm2 maximum
(5) Attach the certification mark supplied with the EB3C on the
EB9Z-A or EB9Z-A1 switch (for Japan application).
(6) When the switch operator of plastic enclosure has a wider
exposed area than the following limits, attach a caution
label as shown below.
Caution
EB3C
Non-intrinsically
Safe Circuit
Applicable Switches
EB3C
Intrinsically Safe Circuit
(5) Maintain at least 6 mm (or 3 mm according to IEC60079-11:
1999) clearance between the terminal of intrinsically safe
circuit and the grounded metal part of a metal enclosure,
and between the relay terminal block of an intrinsically safe
circuit and the grounded metal part of a metal enclosure.
(6) For installing the EB3C, mount on a 35-mm-wide DIN rail
or directly on a panel using screws. Make sure to install
securely to withstand vibration. When mounting on a DIN
rail, push in the clamp completely. Use the BNL6 end
clips on both sides of the EB3C to prevent from moving
sideways.
(7) Excessive extraneous noise may cause malfunction and
damage to the EB3C. When extraneous noise activates the
voltage limiting circuit (thyristor), remove the noise source
and restore the power.
To prevent electrostatic
charges, do not rub the switch
surface during operation.
Use a soft cloth dipped with
water for cleaning.
II C: 20 cm2 maximum
II B: 100 cm2 maximum
Caution Label Example
(7) For the 1-circuit separate wiring, a resistor to prevent reed
switch contact welding and an LED miniature pilot lights
can be connected in series with the contact. See below.
Use the terminal screw of M3 or larger.
Applicable Resistor Ratings
Resistance
100Ω maximum
Rated Wattage
0.5 to 3W
Type
Metal (oxide) film resistors
R
2. Terminal Wiring
Reed Switch
(1) Using a ø5.5 mm or smaller screw driver, tighten the termi
nal screws (including unused terminal screws) to a torque
of 0.6 to 1.0 N·m (recommended value).
Terminal Block
(2) Make sure that IP20 is achieved when wiring. Use
insulation tubes on bare crimping terminals.
(3) To prevent disengaged wires from contacting with other
intrinsically safe circuits, bind together the wires of one
intrinsically safe circuit.
(4) When the adjacent terminal is connected to another intrinsi
cally safe circuit, provide an insulation distance of at least 6
mm.
T-10
EB3C
Applicable LED
IDEC’s IPL1 series LED miniature pilot lights. See pages T-14
and T-17.
EB3C Relay Barriers
Precautions for Operation
4. Output Specifications
(1) When wiring the output from the EB3C, connect the nonintrinsically safe circuit to terminals A and C. The EB3C
output circuit is not equipped with short-circuit protection.
If required, provide a protection in the external circuit.
(2) Relay Output
Some types of loads generate reverse emf (such as sole
noids) or cause a large inrush current (incandescent
lamps), resulting in a shorter operation life of output relay
contacts. The operation life of contacts can be extended by
preventing the reverse emf using a diode, RC, or varistor, or
by suppressing the inrush current using a resistor or RL.
Contacts are made of gold-clad silver. When using at a
small current and a low voltage (reference value: 0.1 mA,
0.1V), test the contact on the actual circuit in advance.
(3) Transistor Output
When connecting a small load, the load may not turn off
because of a leakage current, even though the transistor
output is turned off. If this is the case, connect a resistor in
parallel with the load to bypass the leakage current.
When an excessively high voltage (clamps at 33V, 1W) or
a reverse voltage is applied to the output terminals, the
clamping circuit or output transistor may be damaged.
When driving an inductive load, be sure to connect a diode
across the load to absorb reverse emf.
Load
An
∗
Cn
∗: Surge Absorber
Example of Overvoltage Absorption Circuit
(4) In the common wiring only types, the output terminals are
not isolated from each other.
(5) When connecting the connector type EB3C’s in parallel,
use one power supply to power the EB3C’s. Do not
connect any wiring to the C1 and C2 terminals.
5. Wiring for Intrinsic Safety
(1) The voltage applied on the general circuit connected to
the non-intrinsically safe circuit terminals of the EB3C relay
barrier must be 250V AC, 50/60Hz, or 250V DC at the maxi
mum under any conditions, including the voltage of the
input power and the internal circuit.
(2) When wiring, take into consideration the prevention of
electromagnetic and electrostatic charges on intrinsically
safe circuits. Also, prevent intrinsically safe circuits from
contacting with other circuits.
(3) The intrinsically safe circuits must be separated from nonintrinsically safe circuits. Contain intrinsically safe circuits
in a metallic tube or duct, or separate the intrinsically safe
circuits referring to the table below.
Note: Cables with a magnetic shield, such as a metallic sheath,
prevent electromagnetic induction and electrostatic induction,
however, a non-magnetic shield prevents electrostatic induction
only. For non-magnetic shields, take a preventive measure
against electromagnetic induction.
Voltage and Current of
Other Circuits
Over 440V
440V or less
220V or less
110V or less
60V or less
Over
100A
2000
2000
2000
2000
2000
100A or
less
2000
600
600
600
500
50A or
less
2000
600
600
500
300
10A or
less
2000
600
500
300
150
Flush
Silhouette
Switches
Emergency
Stop
Switches
Control
Stations
(4) When identifying intrinsically safe circuits by color, use light
blue terminal blocks and cables.
Display
Lights
(5) When using two or more EB3C’s to set up one intrinsically
safe circuit in the common wiring configuration,
interconnect two neutral terminals (N1 through N10) on
each EB3C between adjacent EB3C’s in parallel.
Operator
Interfaces
(6) Make sure that the power of the EB3C and contact are
turned off before starting inspection or replacement.
(7) When wiring the intrinsically safe circuit, determine the dis
tance to satisfy the wiring parameters shown below. Note
that parameters are different between separate wiring and
common wiring.
a) Wiring capacitance Cw ≤ Co – (Ci + N × 2 nF)
Co: Maximum external capacitance of the EB3C
Ci: Internal capacitance of the switch
N: The number of switches connected in series or
parallel (the number is infinite)
PLCs
Softwares
Relays
Sockets
b) Wiring inductance Lw ≤ Lo – (Li + N × 5 µH)
Lo: Maximum external inductance of the EB3C
Li: Internal inductance of the switch
N: The number of switches connected in series or
parallel (the number is infinite)
Timers
c) Wiring resistance ≤ Rw
Rw: Allowable wiring resistance
d) Allowable wiring distance D (km) is the smallest value of
those calculated from the capacitance, inductance, and
resistance.
Circuit
Protectors
D ≤ Cw/C C (nF/km): Capacitance of cable per km
D ≤ Lw/L L (mH/km): Inductance of cable per km
D ≤ Rw/2R R (Ω/km): Resistance of cable per km
Note: For the details of wiring the intrinsically safe circuits, refer to a
relevant test guideline for explosion-proof electric equipment in
each country.
Terminal
Blocks
Power
Supplies
Sensors
Ex-proof
Control
Boxes
(8) Applicable Wire Size
0.5 to 2.0 mm2 (AWG20 to AWG14): two wires
However, one wire for 2.0 mm2 (AWG14)
Barriers
Mounting Bracket
LEDs
The following mounting brackets can be used to install the EB3C
relay barriers and EB3L lamp barriers on the mounting holes of IBRC
contact signal transducer, IBPL pilot relay barrier, and IBZ buzzer.
No. of Channels
Part No.
1
2
3
5
6
10
EB9Z-K01
EB9Z-K02
EB9Z-K03
EB9Z-K05
EB9Z-K06
EB9Z-K10
Dimensions
C
B
A
Finely twisted pair cables prevent electromagnetic induc
tion. Adding shields to the twisted pair cables provides pro
tection against electrostatic induction.
Dimension (mm)
A
B
C
28.0
44.0
61.0
51.0
59.5
76.0
51.0
75.0
91.5
97.0
105.0
122.0
97.0
120.0
137.0
97.0
181.0
198.0
ø5 (four)
Safety
Products
Information
7
M4
(two or four)
∗
140
126
90
65
Minimum Parallel Distance between the Intrinsically
Safe Circuit and Other Circuits (mm)
Switches &
Pilot Lights
∗
∗: EB9Z-K10 only
All dimensions in mm.
T-11