Electrical connection
Leuze electronic
MSI-SR5B
17
7.1
Terminal assignments
Connected to the safety relay are 16 numbered terminals to which the cables for the various functions are
connected.
The connection of the safety relay is divided into two sensor groups, additional functions, OSSDs and
supply voltage.
Table 7.1:
Terminal assignments
7.2
Sensor wiring
The following evaluation combinations can be selected through external wiring of the safety relay:
WARNING
Selecting the wrong functions may result in serious accidents!
Always connect light beam safety devices to an external safety relay and activate the restart interlock.
For access guarding, make certain that the restart interlock cannot be unlocked from within the danger
zone but that the danger zone can be viewed from the acknowledgment button (Reset).
Select the functions so that the safety relay is used as intended (see chapter 2.1 „Approved purpose
and foreseeable improper operation“).
Terminal
Description
Function
5
+Ub
Voltage supply, 24 V
6
0V
Voltage supply, 0 V
7
+S12
24 V input 1, channel 2
21
+S11
24 V input 1, channel 1
13
-S12
0 V input 1, channel 2
8
+S22
24 V input 2, channel 2
23
+S21
24 V input 2, channel 1
15
-S22
0 V input 2, channel 2
14
IV-O
24 V voltage supply, contacts
16
RES-I
Reset input
24
RES-O
Signal for automatic restart-disable
22
0V-O
0 V voltage supply, contacts
29
OSSD1
Relay contact 1
30
OSSD1
Relay contact 1
31
OSSD2
Relay contact 2
32
OSSD2
Relay contact 2
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