18 Rockwell Automation Publication 440R-RM003A-EN-P - July 2021
Chapter 3 MSR300 Safety Relay
Input Module
Each MSR300 safety relay system must have at least one MSR320P safety relay
input module and can have up to 10 input modules. An equivalent GSR module
is the DI or DIS safety relay. The MSR320P safety relay occupies slightly less
panel space at 17.5 mm (0.69 in.) compared to 22.5 mm (0.89 in.) for the GSR
relays.
Figure 8 - Input Module Terminals and Panel Space [mm (in.)]
Output Module
Each MSR300 safety relay system must have at least one output module and
can have up to six output modules. Equivalent modules in the GSR family are
the EM safety relay for Immediate Outputs and the EDM safety relay for
delayed outputs.
The significant difference is that the EM and EMD safety relays require power,
ground and SWS connections, whereas the MSR330P and MSR338P safety
relays get their power through the ribbon cable.
Figure 9 - Output Module Terminals and Panel Space [mm (in.)]
22.5 (0.89)
A1 A2 S11 S21
L12 L11 Y32 S34
34 44 14 24
S12 S22 S32 S42
GSR DIS
440R-D22S2
22.5 (0.89)
A1 A2 S11 S21
L12 L11 Y32 S34
13 14 23 24
S12 S22 S32 S42
GSR DI
440R-D22R2
S12 S22 S32
S42 S52 S62
MSR320P
440R-W23218
17.5 (0.69)
A1 A2
L12 L11 X32
13 14 23 24
33 34 43 44
GSR EM
440R-EM4R2
22.5 (0.89)
14 24 34 42
13 23 33 41
MSR330P
440R-W23221
440R-W23222
440R-W23223
22.5 (0.89)
MSR338P
440R-W23224
440R-W23225
440R-W23226
A1 A2 B1 B2
L12 L11 X32
17 18 27 28
37 38 47 48
GSR EMD
440R-EM4R2D
22.5 (0.89)
18 28 38 46
17 27 37 45
Y3 Y5 Y6 Y4
Y3 Y7 Y8 Y4
22.5 (0.89)
Immediate Outputs Delayed Outputs
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