20 SERIES
Modular step relays 16 A
20
SERIES
20.21
1 or 2 Pole 16 A Step relays for direct 35 mm
rail (EN 60715) mounting
20.22, 24, 26, 27, 28
20.23
• 17.4 mm wide
• Test button with mechanical indicators
• Choice of 7 switching sequences
• AC coils and DC coils
• Identification label
• Possible to connect illuminated push buttons
with the additional part 026.00
• 35 mm rail (EN 60715) mount
• Cadmium free contact material
20.21/22/24/26/27/28/23
Screw terminal
• Single phase switch 1 NO
(SPST-NO)
• 35 mm rail (EN 60715) mount
• Double phase switch
• 35 mm rail (EN 60715) mount
• Double phase switch
1NO+1NC (SPST-NO+SPST-NC)
• 35 mm rail (EN 60715) mount
For UL ratings see:
“General technical information” page V
For outline drawing see page 3
Contact specification
Contact configuration
Rated current/Maximum peak current
Rated voltage/
Maximum switching voltage
A
V AC
1 NO (SPST-NO)
2 NO (DPST-NO)
1NO+1NC (SPST-NO+SPST-NC)
16/30
16/30
16/30
250/400
250/400
250/400
Rated load AC1
VA
4000
4000
4000
Rated load AC15 (230 V AC)
VA
750
750
750
230 V incandescent/halogen W
2000
2000
2000
1000
1000
1000
Nominal lamp rating:
fluorescent tubes with
electronic ballast W
fluorescent tubes with
electromechanical ballast W
750
750
750
CFL W
400
400
400
230 V LED W
400
400
400
400
400
400
LV halogen or LED with
electronic ballast W
LV halogen or LED with
electromechanical ballast W
Minimum switching load
mW (V/mA)
Standard contact material
800
800
800
1000 (10/10)
1000 (10/10)
1000 (10/10)
AgSnO2
AgSnO2
AgSnO2
Coil specification
Nominal voltage (UN)
V AC (50/60 Hz)
V DC
Rated power AC/DC
VA (50 Hz)/W
Operating range
8 - 12 - 24 - 48 - 110 - 120 - 230 - 240
12 - 24 - 48 - 110
12 - 24 - 48 - 110
12 - 24 - 48 - 110
6.5/5
6.5/5
6.5/5
(0.85…1.1)UN (50 Hz)/(0.9…1.1)UN (60 Hz)
AC
DC
K
(0.9…1.1)UN
(0.9…1.1)UN
(0.9…1.1)UN
Technical data
Mechanical life AC/DC
cycles
300 · 103
300 · 103
300 · 103
Electrical life at rated load in AC1
cycles
100 · 10
100 · 10
100 · 103
III-2016, www.findernet.com
Minimum/Maximum impulse duration
3
3
0.1 s/1 h (according to EN 60669) 0.1 s/1 h (according to EN 60669) 0.1 s/1 h (according to EN 60669)
Insulation between coil
and contacts (1.2/50 µs)
kV
4
4
4
Ambient temperature range
°C
–40…+40
–40…+40
–40…+40
IP 20
IP 20
IP 20
Protection category
Approvals (according to type)
1
20 SERIES
Modular step relays 16 A
20
SERIES
Ordering information
Example: 20 series relay, 35 mm rail (EN 60715) mount, double phase switch, 2 NO 16 A contacts, coil rated at 12 V DC, AgSnO2 contacts.
2 0 . 2
2 . 9 . 0 1 2 . 4
Series
0
0
0
Contact material
0 = AgNi
4 = AgSnO2
Type
2 = 35 mm rail (EN 60715) mount
Coil voltage
See coil specifications
No. of poles
1 = Single phase switch 1 NO (SPST-NO)
2 = Double phase switch 2 NO (DPST-NO)
3 = Double phase switch 1 NC+ 1 NO (SPST-NO+SPST-NC)
4 = 4 sequence double phase switch 2 NO (DPST-NO)
6 = 3 sequence double phase switch 2 NO (DPST-NO)
7 = 3 sequence double phase switch 2 NO (DPST-NO)
8 = 4 sequence double phase switch 2 NO (DPST-NO)
Coil version
8 = AC (50/60 Hz)
9 = DC
Technical data
Insulation
Dielectric strength
between supply and contacts
V AC 3500
between open contacts
V AC 2000
between adjacent contacts
V AC 2000
Other data
Power lost to the environment
with rated current and coil deenergised W 1.3 (20.21, 20.23, 20.28)
Screw torque
2.6 (20.22, 20.24, 20.26, 20.27)
Nm 0.8
0.8
Coil terminals
Max. wire size
Contact terminals
solid cable
stranded cable
solid cable
mm2 1 x 4 / 2 x 2.5
1 x 2.5 / 2 x 2.5
1 x 6 / 2 x 4
stranded cable
1 x 4 / 2 x 2.5
AWG 1 x 12 / 2 x 14
1 x 14 / 2 x 14
1 x 10 / 2 x 12
1 x 12 / 2 x 14
If the coil is operated for a prolonged period of time, adequate ventilation of the relays must be provided - suggested gap of 9 mm between adjacent
relays.
Coil specifications
DC version data
Coil
code
V
K
Operating range
Umin
Umax
V
V
Resistance Consumption
I at UN
R
mA
Ω
12
9.012
10.8
13.2
27
440
24
9.024
21.6
26.4
105
230
48
9.048
43.2
440
110
110
9.110
99
2330
47
52.8
121
AC version data
Nominal
voltage
UN
Coil
code
V
2
Operating range
Umin
Umax
Resistance Consumption
I at UN
R
(50 Hz)
V
V
8
8.008
6.8
8.8
12
8.012
10.2
13.2
24
8.024
20.4
26.4
27
275
52.8
48
8.048
40.8
110
8.110
93.5
120
8.120
230
240
mA
Ω
4
800
7.5
550
106
150
121
590
64
102
132
680
54
8.230
192
253
2500
28
8.240
204
264
2700
27.5
Type
Number
of steps
20.21
2
20.22
2
20.23
2
20.24
4
20.26
3
20.27
3
20.28
4
1
Sequence
2
3
4
III-2016, www.findernet.com
Nominal
voltage
UN
20 SERIES
Modular step relays 16 A
20
SERIES
Wiring diagrams
L
L
N
N
Example: 230 V AC supply voltage.
Example: 24 V AC supply voltage.
Outline drawings
20.21
Screw terminal
20.22/24/26/27/28
Screw terminal
20.23
Screw terminal
III-2016, www.findernet.com
K
3
20
SERIES
20 SERIES
Modular step relays 16 A
Accessories
Module for use with illuminated push-buttons
Type 026.00
Sealed construction, 7.5 cm insulated flexible wire termination.
Example of wiring diagram of type 026.00
This module is necessary when using between 1 and a maximum of 15
illuminated push buttons in the coil circuit (Each 1.5 mA max, 230 V AC).
It must be connected in parallel to the coil of the relay.
Adaptor for panel mounting, 17.5 mm wide
020.01
Sheet of marker tags, plastic, 24 tags, 9 x 17 mm
020.24
Separator for rail mounting, plastic, 9 mm wide
022.09
020.01
020.24
022.09
III-2016, www.findernet.com
K
4
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