24 Rockwell Automation Publication 440R-UM013F-EN-P - July 2021
Chapter 3 Power, Ground, and Wire
Figure 14 - Example Connections to Safety Edges
Safety Outputs GSR safety relays have two types of outputs:
• Electromechanical (CI, DI, EM, EMD, and SI safety relays)
• OSSD (DIS safety relay)
To extend the operating life of the safety relays, surge suppression is required.
Electromechanical Outputs
Internally, the CI, DI, EM, EMD, and SI safety relays have two positive-guided
relays that are connected in series to form the safety outputs. One side of the
contact must be connected to a voltage supply (see Specifications
on page 77
for appropriate ratings). The other side of the contact must be connected to a
load.
Figure 15 - Electromechanical Output Connections
OSSD Outputs
The DIS safety relay has OSSD safety outputs on terminals 14, 24, 34 and 44.
Output terminals 14 and 24 are pulse tested and can switch loads up to 1.5 A.
They can only tolerate a load capacitance up to 1.6 µF. Terminals 34 and 44 have
a series diode and can switch loads up to 0.5 A. They can tolerate a load
capacitance up to 9 µF. Terminals 34 and 44 are also pulse tested, but these
IMPORTANT When using safety edges, the DI and DIS safety relays must be set for
AND logic. If only one edge is used, the second input must either be
connected with jumpers or to another safety device. If another safety
device is connected to the second input, the outputs of the safety device
must be ON during configuration and during power-up.
S11 S21 S22 S12 S42 S32S11 S21
S22 S12
S11 S21 S22 S12 S42 S32
Edge 1
Input 1
Input 1 Input 2
Pulse
Testing
Outputs
Pulse
Testing
Outputs
CI and SI
DI and DIS
Input 1 Input 2
Pulse
Testing
Outputs
DI and DIS
Edge 1
Edge 2 Edge 1
EM Device
13 23 33 43
14 24 34 44
K4K3K2K1
17 27 37 47
18 28 38 48
K4K3K2K1
13 23 33
14 24 34
K3K2K1
13 23
14 24
K2K1
13 23
14 24
K2K1
V supply V supply V supply V supply V supply
V common V common V common V common V common
CI DI EM EMD SI
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