18 Rockwell Automation Publication 440R-UM013G-EN-P - December 2022
Chapter 3 Power, Ground, and Wire
Figure 5 - Terminal Identification
Figure 6 shows the markings on the front face of each safety relay, including the terminal and
status indicator identifications.
Figure 6 - Safety Relay Face Markings
Table 2 lists the terminal functions. Many of the terminals perform common functions on
multiple safety relays.
Table 2 - Terminal Assignments and Functions
Terminal Function Applies To
A1 +24V supply (+10%, -15%) All
A2 24V common All
S11 Pulse test output for Channel 1 CI, DI, DIS, and SI
S21 Pulse test output for Channel 2 CI, DI, DIS, and SI
S12 Safety input for IN1 Channel 1 CI, DI, DIS, and SI
S22 Safety input for IN1 Channel 2 CI, DI, DIS, and SI
S32 Safety input for IN2 Channel 1 DI and DIS
S34 Reset input CI, DI, DIS, and SI
S42 Safety input for IN2 Channel 2 DI and DIS
Y32 Auxiliary non-safety output DI, DIS, and SI
X32 Auxiliary non-safety output EM and EMD
B1 Jog input EMD
B2 Retrigger input EMD
L11 Single wire safety output All
L12 Single wire safety input DI, DIS, EM, and EMD
13/14, 23/24 Safety outputs - electromechanical relay CI, DI, EM, and SI
33/34 Safety outputs - electromechanical relay CI and EM
43/44 Safety outputs - electromechanical relay EM
14, 24 Safety Outputs - OSSD DIS
34, 44 Safety Outputs - OSSD for capacitive loads DIS
41/42 Auxiliary non-safety output CI
17/18, 27/28, 37/38, 47/48 Safety Outputs, Delayed - electromechanical relay EMD
S12 S22 AP S54
A1 A2 P12 P22
X2
X1
X1
X2
X3
X4
X3 X4
PWR/Fault
IN1
51/L61
Logic IN
X14/X24 L11
L12 L11 Y32 S44
X14 X24 51 L61
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