56 Rockwell Automation Publication 440R-UM013E-EN-P - March 2017
Chapter 9 Application and Wiring Examples
The DIS safety relay monitors two devices with OSSD outputs in Figure 47
The DIS safety relay logic setting is 6: (IN1 AND IN2) OR L12 with
automatic reset. The output terminals 34 and 44 are designed to tolerate higher
capacitance loads (but lower resistive load) as compared to terminals 14 and
24.
Figure 47 - High Capacitive Load
EM Safety Relay
(Cat.No.440R-EM4R2)
The EM safety relay in Figure 48 expands the number of outputs of the DI
safety relay. The single wire safety signal from terminal L11 to L12 instructs
the EM safety relay to turn on and off. The EM safety relay outputs mimic the
DI safety relay outputs. The DI safety relay monitors contactors K1…K6 and
the status of the EM safety relay by sourcing the reset signal from the X32
terminal on the EM safety relay.
Figure 48 - Expansion of Immediate Safety Outputs
LOGIC
0
1
2
3
4
56
7
8
DIS
440R-D22S2
S32 A1
Y32
S21S11 S22S12 S34S42
L12 L11
34A2 44
14 24
24V DC
+
OSSD1
OSSD2
-
24V Com
To PLC
+
OSSD1
OSSD2
-
A1
L11
X32
L12 14 34
44
24
13 33 4323
A2
EM
440R-EM4R2
A1
S11 S21 S12S22
S32 L11 Y32L12
13
14S42
23
24
S34
A2
DI
440R-D22R2
0
1
2
3
4
56
7
8
LOGIC
K1
24V DC
24V Com
K2
K6
K5
K3
K4
Reset
To PLC
K1
K2 K3 K4
K5 K6
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