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A
IC220SDL840
OUT0_Ch1_13
OUT0_Ch1_14
OUT0_Ch2_13
OUT0_Ch2_14
UT1 (UT2)
IN1 (IN2)
UT2 (UT1)
IN2 (IN1)
GFK-2734 Chapter 6 Connection examples for the safe relay outputs and the safety-related segment circuit
6.5.2
Monitoring via separate readback
Monitoring is separate for each channel of an output, using one alarm input for each. In this
case, both alarm inputs are assigned and are not available for the other output. The
advantage of this wiring is that, in the event of an error, diagnostics are more accurate than
for common readback.
24 V
400 V
K1
K1 (R)
24 V
K2
K2 (R)
M
Figure 6-4
Two-channel assignment of floating contacts with separate readback
WARNING: Failure of the safety relay contacts due to overload
Protect all safety relay contacts against overload with suitable fuses (see "Safe digital
relay outputs" on page 11-4).
The illustrated 24 V voltage is not provided by the VersaPoint station.
Key:
A
B
OUT0_Ch1_13
OUT0_Ch1_14
B
IC220SDL840
OUT0_Ch1_13
OUT0_Ch1_14
OUT0_Ch2_13
OUT0_Ch2_14
UT1 (UT2)
IN1 (IN2)
UT2 (UT1)
IN2 (IN1)
Alternative A
Alternative B
Output 0, channel 1, contact 13
Output 0, channel 1, contact 14
24 V
400 V
K1
K1 (R)
K2
K2 (R)
M
77220011
6-13
6
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