3 System description of safe I/O modules
| Operating with and without own test pulses
13
u-remote IP20 modules for functional safety manual
1484600000/04/06.2017
Examples for operating with test pulses
1
2
3
4
DI X (PN)
AUX-O X
AUX-O Y
DI Y (P)
Connecting example type A sink
Input current
2.5 mA typ. (acc. to Type 3 as per EN 61131-2)
Output voltage:
AUX-O X, P-switching 22 V typ. (Supply voltage minus 2 V)
AUX-O X, N-switching 0 V
AUX-O Y
Supply voltage 24 V typ.
Input capacity
10 nF typ.
1
2
3
4
+24 V DC
DI X (PN)
AUX-O X
AUX-O Y
DI Y (P)
Safety relay
Connecting example type B sink
Test pulse delay
Depending on the parameterisation
Test pulse duration
0.5 to 10 ms; depending on the parameterised input
delay
Test pulse intervall
1200 ms
Input capacity
10 nF typ.
Antivalent circuits are possible with V2 modules only.
1
2
3
4
DI X (PN)
AUX-O X
AUX-O Y
DI Y (P)
Connecting example with antivalent input circuit (V2 only)
For the operation with test pulses the V2 modules can be
installed either with three or with four wires:
1
2
3
4
DI X
AUX-O X
AUX-O Y
DI Y
Operation with own test pulses, 4-wire installation
1
2
3
4
DI X
AUX-O X
AUX-O Y
DI Y
Operation with own test pulses, 3-wire installation
Examples for operating without test pulses
The following parameter settings are needed if an external
device is connected that generates test pulses by its own:
V1 modules: test pulse “disabled“
V2 modules: test pulse
“external”.
1
2
3
4
+24 V DC
GND
DI X (PN)
AUX-O X
AUX-O Y
DI Y (P)
OSSD
Safety
device
Connecting example for operation without own test pulses, type C sink, class 1
Test pulse duration
Max. 1 ms
Test pulse intervall
Min. 0
Input resistance
Min. 7.2 kOhm (at 18 V)
Input capacity
Max. 10 nF typ.
Input inductivity
Max. 1 mH
Summary of Contents for UR20-4DI-4DO-PN-FSOE
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