9
Technical Reference Data
B7A
The following information applies to all B7A Series Link Modules
1 Connecting B7A to a programmable
1 Signal configuration examples for inputs
controller
and outputs
1 Peripheral circuits of printed circuit
1
1
1
1
board B7A models
1 Noise protection circuits recommended
1 Transmission errors and output signals
I/O ON/OFF conditions
Precautions
Recommended cables
Mounting guidelines
Operation
3 CONNECTING B7A TO A PROGRAMMABLE CONTROLLER
Each terminal of the B7A should be used for only single signal transmission without a transmission host. Therefore the B7A cannot be
connected to OMRON’s SYSMAC BUS Remote I/O System. To transmit signals from the B7A to a programmable controller, connect the
B7A’s terminals to an I/O module mounted on the PLC.
3 RECOMMENDED COMBINATIONS OF OMRON PLC I/O MODULES AND B7A LINKS
Outputs
B7A Link
M d l
Module
Conditions of PLC
C500 I/O Modules
C200H I/O Modules
ID213
ID218
ID219
ID212
ID215
ID501
ID216
ID217
12 to
24 VDC
12 to
24 VDC
24 VDC
24 VDC
24 VDC
5 VDC
24 VDC
24 VDC
+
common
+/-common
+
common
+/-common
+/-common
+/-common
+/-common
+/-common
16 points
32 points
64 points
16 points
32 points
32 points
32 points
64 points
B7A-R6B11
B7A-R6B31
B7A-R6B16
B7A-R6B36
B7A-R6A52
B7A-R6A57
B7AS-R6B11
B7AS-R6B31
B7AS-R6B16
B7AS-R6B36
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-R10SC01
B7A-R10MC
DC or AC/DC input and
+ common or +/-- common
(-- common if the PLC with
non--voltage input is used.)
Yes
Yes
Yes
Yes
Yes
Yes
(See
Note)
Yes
Yes
B7A-R6F11
B7A-R6F31
B7A-R6F16
B7A-R6F36
DC or AC/DC input and
-- common or +/-- common
(+ common if the PLC with
non--voltage input is used.)
No
Yes
No
Yes
Yes
No
Yes
Yes
Note: An independent power supply for the PLC is required due to the difference in operating voltage between the PLC and B7A.
B7A Technical Reference
B7A Technical Reference
Input
B7A Link
Module
Conditions of PLC
C500 I/O Module
C200H I/O Module
OC221
OD212
OD412
OC225
OD215
OD212
OD218
OD219
Relay
output
PNP
output
NPN
output
Relay
NPN
output
NPN
output
NPN
output
NPN
output
24 VDC
12 to
24 VDC
12 to
48 VDC
24 VDC
5 to
24 VDC
24 VDC
5 to
24 VDC
24 VDC
16 points
32 points
32 points
16 points
32 points
16 points
32 points
64 points
B7A-T6A1
B7A-T6A6
B7A-T6B1
B7A-T6B6
B7AS-T6B1
B7AS-T6B6
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-T10S1
B7A-T10S3
NPN transistor output
(residual voltage must be
1.6 V max. if the B7A has
10 output points.)
Relay output
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
B7A-T6C1
B7A-T6C6
PNP transistor output, relay
output
Yes
Yes
No
Yes
No
No
No
No
B7A-T6D2
B7A-T6D7
TTL output (See Note 1),
PNP transistor output
See note 2
Yes
See note 2
See note 2
See note 2
See note 2
See note 2
See note 2
B7A-T10M2
TTL output (See Note 1)
See note 2
See note 2
See note 2
See note 2
See note 2
See note 2
See note 2
See note 2
Note: 1. An independent power supply for the PLC is required due to the difference in operating voltage between the PLC and B7A.
2. An external interface unit is required.
2
B7A Technical Reference
B7A Technical Reference
3 EXAMPLES OF CONNECTIONS WITH PLC I/O MODULES
PLC output
B7A input
3G2A5-OD212
B7A-T6CP
Transmission
path
12 to 24 VDC
B7A output
B7A-R6BPP
PLC input
3G2A5-ID213
12 to 24 VDC
Transmission
path
Any one of B0
through B15
can be used.
3G2A5-OD412
B7A-T6AP
Transmission
path
12 to 24 VDC
B7A-R6BPP
3G2A5-ID219
24 VDC
Transmission
path
Any one of B0
through B15
can be used.
Note: The B7A-T6BP can be connected in the same method.
C200H-OC225
B7A-T6AP
Transmission
path
24 VDC
B7A-R6FPP
C200H-ID212
24 VDC
Transmission
path
Any one of B0
through B15
can be used.
Note: The B7A-T6BP can be connected in the same method.
3
B7A Technical Reference
B7A Technical Reference
PLC output
B7A input
C200H-OD212
B7A-T6AP
Transmission
path
B7A output
B7A-R6A5P
PLC input
3G2A5-ID218
24 VDC
24 VDC
12 to 24 VDC
Note: The B7A-T6BP can be connected in the same method.
Transmission path
3G2A5-OC221
B7A-T6DP
B7A-R6A5P
24 VDC
Transmission
path
R=18 kΩ (1/10W min.)
24 VDC
C200H-OD215
Transmission
path
B7A-T6DP
Transmission
path
12 to 24 VDC
R=4.7 kΩ (1/2W min.)
4
C200H-ID215
B7A Technical Reference
B7A Technical Reference
3 PERIPHERAL CIRCUITS OF PRINTED CIRCUIT BOARD MODELS
The printed circuit board model has a minimum ON
discrimination voltage of 2.2 V and a maximum OFF
discrimination voltage of 0.8 V, which are suitable for TTL circuits.
If sensors are used for input, the following input circuits are
required.
Input with B7A and Common Power Supply
12 to 24 VDC, 10-point PCB Model only
The 10-point printed circuit board model has an input voltage
range of 0 to 5 VDC. If a common power supply is connected,
current limit resistor R3 is required as shown in the diagram
below. Use the following formula to calculate the value of R3.
Two--wire DC Sensor Input
R3 =
If a two-wire DC sensor is used for input, current limit resistor R1
and leakage current diverter R2 are required as shown in the
diagram below. The following table lists R1 and R2 values for the
E2E-XD-N Two-wire DC Proximity Sensor (with a current leakage
of 0.8 mA maximum, a residual voltage of 3 V maximum, and a
minimum control output current of 3 mA).
Supply voltage VS (V) -- 1.4 (V)
Input current (2 x 10 --3 (A))
Vs(12 to 24 VDC)
+
Interior of B7A
Input Interface (E2E--XD--N)
Supply voltage
12 V
1,800 Ω
5,600 Ω
R2
820 Ω
820 Ω
+
R1
2.2 kΩ
R3
--
Interior of B7A
Note: The 16-point module’s input voltage range is 0 V to
the power supply voltage. Therefore no current limit
resistor is required.
Intemal circuit
Two-wire DC
proximity sensor
IN
24 V
R1
-- 2,200 (Ω)
Intemal circuit
Input Interface Circuit
IN
R2
--
3 NOISE PROTECTION CIRCUIT
If there is a possibility of noise interference from the power supply, input, and/or output lines, add the following noise protection circuits.
Power supply noise protection circuit
Input noise protection circuit
Output noise protection circuit
V1N
+
12 to
24 VDC
R
Photocoupler
Input device R
+
V
ZD
IN
C
B7A
R: 10 to 20 Ω (1/8 W min.)
C: 33 µF min.
min with a dielectric strength of 50 V min.
min
Load
C
+
--
R
+
Photocoupler
C: 0.1 µF min.
R: Photocoupler input current limit resistor
-B7A
IN
Input device
V
OUT
-B7A
R: Photocoupler input current limit resistor
ZD: VZD = 36 V (with a power consumption
of 1 W min.)
+
Load
ZD
OUT
ZD
-ZD: VZD = 36 V
(with a power consumption of 1 W min.)
-B7A
B7A
ZD: VZD = 36 V
(with a power consumption
of 1 W min.)
5
B7A Technical Reference
B7A Technical Reference
3 TRANSMISSION ERRORS AND OUTPUT SIGNALS
Transmission errors occur in the following cases:
Output Signals
• When the signal or 0 V wire is disconnected.
• When the signal is influenced by high-level external noise or the
HOLD: When an error occurs, the output signals just before the
occurrence of the error will be maintained.
signal is excessively deformed because the length of the
transmission path is more than the permissible distance.
LOAD OFF: When an error occurs, all output signals will be
turned OFF.
• When the supply voltage to the Link Terminals are not within the
Automatic Reset
• Immediately after the Link Terminals are turned on.
When the error is corrected, the Link Terminals will automatically reset themselves.
operating voltage range (12 to 24 V ±10%).
(An error is reset within 300 ms after the power is turned on.)
3 I/O STATUS
Signal Configuration
Input Models
Type
Applicable
model
ON/OFF
Screw
terminals
B7A-T6A1
B7A-T6A6
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-T10S1
For switches
ON: Switch is closed.
OFF: Switch is open.
B7A-T10S3
For photoelectric sensors and proximity sensors (NPN)
ON: Sensor signal is ON (residual voltage is 1.6 V max.).
OFF: Sensor signal is OFF.
Circuit
Suitable input
example
IN
SW
_
+V
OUT
Sensor
B7A-T6B1
B7AS-T6B1
B7A-T6B6
B7AS-T6B6
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
For photoelectric sensors and proximity sensors (NPN)
ON: Sensor signal is ON (residual voltage is 4 V max.).
OFF: Sensor signal is OFF.
B7A-T6A1
B7A-T6A6
B7A/S-T6B1
B7A/S-T6B6
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
For proximity sensors (two-wire sensor with DC output)
ON: Sensor signal is ON (residual voltage is 4 V max.).
OFF: Sensor signal is OFF (leakage current is 1.5 mA
max.).
B7A-T6C1
B7A-T6C6
B7AM-8F31
For switches
ON: Switch is closed.
OFF: Switch is open.
IN
0V
_
+V
+
OUT
Sensor
0V
+V
Sensor
+
0V
IN
For photoelectric sensors and proximity sensors (PNP)
ON: Sensor signal is ON (residual voltage is 4 V max.).
OFF: Sensor signal is OFF.
0V
+V
OUT
Sensor
0V
6
E3S Photoelectric
sensor
E2E-XD-N 2-wire
DC Inductive
Proximity Sensor
--
SW
Sensor
E2E-XPE 3-wire
DC Inductive
Proximity Sensor
_
+
+V
WL01P
Limit Switch
IN
IN
For proximity sensors (two-wire sensor with DC output)
ON: Sensor signal is ON (residual voltage is 4 V max.).
OFF: Sensor signal is OFF (leakage current is 1.5 mA
max.).
A3G Push-button
Switch (microload)
+
A3G Push-button
Switch (microload)
WL01P Limit
Switch
E2E-XD-N 2-wire
DC Inductive
Proximity Sensor
IN
+
IN
_
E2E-XPF 3-wire
DC Inductive
Proximity Sensor
E3S Photoelectric
sensor (PNP
output type)
B7A Technical Reference
B7A Technical Reference
Input Models
Type
Applicable
model
Printed
circuit
board
models
(see
note)
B7A-T6D2
B7A-T6D7
B7A-T10M2
ON/OFF
For switches
ON: Switch is closed.
OFF: Switch is open.
Circuit
Suitable input
example
A3G Push-button
Switch (microload)
+V
IN
SW
For NPN open-collector inputs
ON: Transistor is OFF.
OFF: Transistor is ON. (residual voltage is 0.8 V max.)
+V
IN
0 UT
+V
+
0 UT
For IC (TTL, CMOS) inputs
ON: Output is 2.2 V min.
OFF: Output is 0.8 V max.
3G2A5-OD213
C200H-OD215
PLC Transistor
Output Module
_
_
For PNP open-collector inputs
ON: Transistor is ON.
OFF: Transistor is OFF.
WL01P Limit
Switch
IN
C200H-OD216
C200H-OD217
PLC PNP Output
Module
3G2A5-OD501CN
C200H-OD501
PLC TTL Output
Module
TTL
+5 V
IN
_
CMOS
+5 V
IN
_
PLC Link
Terminal
Adapter
B7A-T6E3
B7A-T6E8
B7A-T3E3
B7A-T3E8
For PLC output unit, NPN open collector
ON: Transistor ON
OFF: Transistor OFF
OUT
B7A
------
IN
COM
--
Note: The positive input voltage range of the B7A-T6DP printed circuit board model is 0 to 24 VDC and the positive input voltage of the
B7A-T10M2 printed circuit board model is 5 VDC.
7
B7A Technical Reference
B7A Technical Reference
Output Models
Type
Screw terminals
Output
configuration
Applicable model
B7A/S-R6B11
B7A/S-R6B31
B7A/S-R6B16
B7A/S-R6B36
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-R10SC01
NPN open
collector
ON/OFF
Circuit
For PLC input
ON: PLC is ON.
OFF: PLC is OFF.
COM
+
IN
OUT
For relays and solenoids
ON: Operates.
OFF: Reset.
PLC
+
Load
OUT
PNP open
collector
B7A-R6F11
B7A-R6F31
B7A-R6F16
B7A-R6F36
B7AM-8F31
For PLC input
ON: PLC is ON.
OFF: PLC is OFF.
IN
OUT
COM
--
For relays and solenoids
ON: Operates.
OFF: Reset.
PLC
OUT
Load
-Printed circuit
board model
NPN open
collector
B7A-R6A52
B7A-R6A57
B7A-R10MC
For PLC input
ON: PLC is ON.
OFF: PLC is OFF.
COM
+
IN
OUT
For relays and display terminal
ON: Operates.
OFF: Reset.
PLC
5 to
24 VDC
Load
OUT
For IC (TTL, CMOS)
ON: Input is Low.
OFF: Input is High.
+5V
OUT
GND
--
Link master
adapter
NPN open
collector
B7A-R6A13
B7A-R6A18
B7A-R6A33
B7A-R6A38
B7A-R3A13
B7A-R3A18
B7A-R3A33
B7A-R3A38
For PLC input module, + common
photocoupler input
ON: PLC is ON.
OFF: PLC is OFF.
B7A
+
OUT
COM
IN
3 I/O ON/OFF CONDITIONS
Input
Output
Screw terminal
Printed circuit board
Active high (N/P open)
Screw terminal
Link master adapter
p
Active low (N/P 0 V)
ON
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
Printed circuit
b d
board
ON
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
Link master
adapter
d t
ON
ON
OFF
ON
ON
OFF
OFF
ON
OFF
OFF
8
B7A Technical Reference
B7A Technical Reference
Precautions
3 GENERAL
Each terminal of the B7A-series should be used for only single
signal transmission without a transmission host. The B7A-series
cannot be connected to OMRON’s SYSMAC BUS Remote I/O
System.
Avoid places subject to corrosive gasses or continual shock
and/or vibration.
Do not apply a strong acidic or alkaline solvent to the printed
circuit board to remove the flux. The 10-point PCB version of B7A
does not have sealed construction, so the cleaning solvent must
not remain on the bottom of the module after it is cleaned. The
16-point PCB version of B7A does have sealed construction.
The input and output circuits are not isolated. If Link Terminals
are influenced by external noise, use photocouplers to isolate the
I/O circuits.
If high-level electrostatic discharge is generated at the installation
site (e.g., for transfer of a molding material, powder, or liquid
through a pipe), separate the Link Terminals as far as possible
from the source of the electrostatic discharge.
3 LINK MASTER ADAPTERS
If the Input and Output Terminals are connected via a threeconductor cable to transmit signals with a single power supply
(i.e., the power supply is connected directly to one of the Link
Terminals and indirectly to the other), the transmission distance
greatly varies with the diameter of the cable. This is due to the
potential difference between the current on the 0 V transmission
wire and on the 0 V I/O transmission line caused by the
resistance of the cable. By increasing the diameter of the cable
(decreasing its resistance), the transmission distance can be
increased. By reducing the resistance of the transmission path to
2.5 Ω or less for example (i.e., increasing the thickness of the
wire to 1.25 mm2 or more), a transmission distance of 160 m will
be achieved.
Wire the screw terminals of the adapter while disconnected from
the PLC I/O module. This avoids imposing excessive force on the
PLC’s I/O connector.
It is recommended that a switch for minute loads be connected to
the 16-point screw terminal model because there is a contact
input current of only 3 to 6 mA to the model from the connected
switch or relay.
The Output Terminal has an error of 300 ms maximum after the
Output Terminal is turned on. The user should be well aware of
this before using error outputs.
Note: The 10-point and 16-point models cannot be connected to
each other because their transmission signal data formats
are not compatible.
3 SCREW TERMINAL MODELS
Apply a torque of 8 to 12 kgf : cm (0.78 to 1.18 N : m) to tighten
wiring terminals.
Lift both edges of the terminal cover to open it.
Apply a torque of 8 to 12 kgf : cm (0.78 to 1.18 N : m) to tighten
wiring terminals.
Use the correct combination of B7A modules and PLC modules
or the B7A may be damaged. The following are correct
combinations.
B7A Input Module and PLC Output Module
B7A Output Module and PLC Input Module
3 WIRING
Separate the transmission lines from high voltage or power lines
as far away as possible and do not wire the transmission lines in
parallel with high voltage or power lines. If Link Terminals are
used near a device that generates noise, make sure that the Link
Terminals do not malfunction due to the noise generated from the
device.
Make sure to turn off the Link Terminals while wiring in order to
avoid a short--circuiting accident that may damage the internal
element(s) of the Link Terminals.
Link Terminals will malfunction if the SIG terminal is
short--circuited with one of the power terminals or BPP terminal.
Before turning the power on, make sure that the SIG terminal is
not short--circuited with these terminals.
Before checking the insulation resistance of the transmission
path, disconnect the wires from the Link Terminals.
If the OUT terminal and positive power terminal of the Output
Link Terminal is short--circuited during signal transmission, the
Link Terminal will malfunction. Apply an appropriate load between
these terminals.
When measuring the current, use a multimeter without disconnecting the load.
3 RECOMMENDED CABLES
If the Input or Output Terminal is mounted to a panel with screws,
apply a torque of 6 to 10 kgf : cm (0.59 to 0.98 N : m) to tighten
the screws.
3 PRINTED CIRCUIT BOARD MODELS
Soldering (with a soldering iron or in a soldering bath) must be
completed within 5 s at a temperature of 260°C or less.
The supply voltage must be within the operating voltage range.
Do not use a power supply which generates irregular voltages or
large ripples.
For B7A with Normal Speed I/O Delay
VCTF Cable
When a single power supply is used for two Input Terminals or
Output Terminals:
VCTF 0.75 x 4 C (B7AM)
VCTF 0.75 x 3 C (B7A/S/C)
When independent power supplies are connected to each Link
Terminal:
VCTF 0.75 x 3 C (B7AM)
VCTF 0.75 x 2 C (B7A/S)
The following cable can also be used.
9
B7A Technical Reference
B7A Technical Reference
Twisted-pair Wire
When a single power supply is connected to either the Input
Terminal or Output Terminal, the thickness of the wire must be
0.75 mm2 or greater.
Transmission distance: 100 m max.
3 MOUNTING
To mount the Input or Output Terminal to a DIN track, hook the
upper part (A) on the DIN track first. Then press the Input or
Output Terminal in the (B) direction.
For B7A with High Speed
Shielded Wire
Use a shielded wire with a thickness of 0.75 mm2 min.
(A)
3 COLOR
Screw Terminal Models
Marked “IN” in white
ink. The background is
red.
(B)
When mounting more than two Input or Output Terminals side by
side, leave a space of 3 mm minimum between each Terminal.
It is recommended that PFP-S Spacers be used to maintain a
space of 3 mm between each Input or Output Terminal.
Input Terminal
Marked “OUT” in black ink.
The background is yellow.
Output Terminal
3 mm min.
Insert a flat--blade screwdriver to part (C) to remove the Input or
Output Terminal from a DIN track.
30 mm min.
(C)
Rail lock
NOTE: DIMENSIONS SHOWN ARE IN MILLIMETERS. To convert millimeters to inches divide by 25.4.
9
OMRON ELECTRONICS, INC.
OMRON CANADA, INC.
One East Commerce Drive
Schaumburg, IL 60173
885 Milner Avenue
Scarborough, Ontario M1B 5V8
1-800-55-OMRON
416-286-6465
Cat. No. GC RIO-1
04/00
Specifications subject to change without notice.
Printed in U.S.A.