Pin assignment
14
24
34
I2
R1
X2
Y2
A2
13
23
33
I1
S1
X1
Y1
A1
1
3
5
7
9
11
13
15
2
4
6
8
10
12
14
16
Figure 9: Terminals on front connector
Table 3: Pin assignment of the terminals
Terminal
Description
13, 14
1)
2)
Enabling current path
23, 24
1)
2)
Enabling current path
33, 34
1)
2)
Enabling current path
I1
3)
Safety capable input
I2
3)
Safety capable input
S1
2)
4)
Reset pushbutton input, external device monitoring (EDM)
R1
Test pulse output
X1
3)
Test pulse output
X2
3)
Test pulse output
Y1
Application diagnostic output (NC)
Y2
Application diagnostic output (reset required)
A1
Voltage supply 24 V DC
A2
Voltage supply 0 V DC
1)
The enabling current paths must be supplied by the same voltage supply.
2)
The enabling current path and external device monitoring (EDM) must be wired within the control cabinet.
3)
Connect dual-channel switching elements of the safety sensors between X1 and I1 or X2 and I2.
4)
•
Use with restart interlock, with external device monitoring (EDM): Connect the N/C contacts of the
actuators between voltage supply U
v
, the N/O contact of the reset pushbutton and S1.
•
Use with restart interlock, without external device monitoring (EDM): Connect the N/O contact of
the reset pushbutton between S1 and voltage supply U
V
.
•
Use without restart interlock, with external device monitoring (EDM): Connect the N/C contacts of
the actuators between R1 and S1.
•
Use without restart interlock, without external device monitoring (EDM): Connect R1 and S1 with a
wire jumper.
6
ELECTRICAL INSTALLATION
20
O P E R A T I N G I N S T R U C T I O N S | ReLy EMSS3
8023937/2019-10-11 | SICK
Subject to change without notice
