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Detailed descriptions of I/O modules | Digital output module UR20-4RO-SSR-255
123Manual u-remote1432790000/03/02.2014
DigitaloutputmoduleUR20-4RO-SSR-255(OrderNo.1315540000)
The digital output module UR20-4RO-SSR-255 uses four
semiconductor switches to control up to four actuators,
each with a maximum of 0.5 A at 255V AC. The switching
characteristics of the semiconductor switch have it as being
closed when the voltage crosses zero and open when the
current crosses zero. Each connector features a potential-free
NO contact. A status LED is assigned to each channel.
ATTENTION
I/O modules can be destroyed by surge voltage.
If surge voltages can be expected, the switch input
must be protected externally, e.g. with a VSSC6MOV
240VAC/DC surge voltage protection terminal (Order No.
1064630000), see connection diagram on the right.
1
2
3
4
2
1
3
4
1
2
3
4
2
4
3
1
2
4
3
1
4RO·SSR
277 V AC max.
277 V AC max.
277 V AC max.
277 V AC max.
1
2
3
4
2
1
3
4
1
2
3
4
2
4
3
1
2
4
3
1
4RO·SSR
14
25
COM0
COM0
NOO
NOO
COM1
COM1
NO1
NO1
COM2
COM2
NO2
NO2
COM3
COM3
NO3
NO3
COM0
COM0
NOO
NOO
COM1
COM1
NO1
NO1
COM2
COM2
NO2
NO2
COM3
COM3
NO3
NO3
N
FE
VSSC6 MOV 240
L
ConnectiondiagramUR20-4RO-SSR-255
6.13 DigitaloutputmoduleUR20-4RO-SSR-255