![Weidmuller UR20-4DI-4DO-PN-FSOE Manual Download Page 19](http://html.mh-extra.com/html/weidmuller-0/ur20-4di-4do-pn-fsoe/ur20-4di-4do-pn-fsoe_manual_952407019.webp)
4 System description of safe power-feed modules
| Operation with and without test pulses
19
u-remote IP20 modules for functional safety manual
1484600000/04/06.2017
4.6 Operation with and without test pulses
The safe input circuits are designed to connect passive dual
channel switching devices. Each input channel is provided
with pulsed voltage the test pulses of which are analysed.
Therefore the highest safety levels can be achieved (see tech-
nical data).
1
2
3
4
1
2
3
4
S11 / S31
S12 / S32
S21 / S41
S22 / S42
S11 / S31
S12 / S32
S21 / S41
S22 / S42
+24 V DC
Safety relay
Sensor
Exemplary operation with test pulses
The safe power-feed module UR20-PF-O-2DI-DELAY-SIL
might also be operated without test pulses. This is mandato-
ry whenever an external device gernerating own test pulses
is connected.
When using switching devices generating own
test pulses please regard that low level with a
duration of more than 2 ms will be detected as an
opening of the safety circuit.
1
1
2
3
4
1
4
2
3
4
+24 V DC
S11 / S31
S12 / S32
S21 / S41
S22 / S42
GND
...
1
2
3
4
+24 V DC
S11 / S31
S12 / S32
S21 / S41
S22 / S42
Safety relay
with
OSSD
outputs
Exemplary operation of the UR20-PF-O-2DI-DELAY-SIL without test pulses
Test pulses can be enabled or disabled using the DIP-switch-
es of the module.
Summary of Contents for UR20-4DI-4DO-PN-FSOE
Page 1: ...Remote I O system u remote IP20 modules for functional safety Manual Original Letʼs connect ...
Page 8: ...8 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 20: ...20 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 70: ...70 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 72: ...72 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 96: ...96 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 102: ...ANNEX A 6 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 103: ...ANNEX A 7 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 104: ...ANNEX A 8 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 105: ...ANNEX A 9 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 106: ...ANNEX A 10 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 107: ...ANNEX A 11 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 108: ...ANNEX A 12 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 109: ...ANNEX A 13 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 110: ...ANNEX A 14 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 111: ...ANNEX A 15 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 112: ...ANNEX A 16 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 113: ...ANNEX A 17 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 114: ...ANNEX A 18 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 115: ...ANNEX A 19 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 116: ...ANNEX A 20 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 117: ...ANNEX A 21 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 118: ...ANNEX A 22 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 119: ...ANNEX A 23 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 120: ...ANNEX A 24 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 121: ...ANNEX A 25 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 122: ...ANNEX A 26 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...
Page 124: ...A 28 1484600000 04 06 2017 u remote IP20 modules for functional safety manual ...