Allen-Bradley Guardmaster - SI Safety Relay (Cat. No. 440 R-S12 R2)

58 Rockwell Automation Publication 440R-UM013E-EN-P - March 2017
Chapter 9 Application and Wiring Examples
The EMD safety relay in Figure 51 is configured for a maximum of a
100-second jog. The single wire safety signal from terminals L11 to L12
enables the EMD safety relay. When enabled, the jog switch can be pressed and
held closed to turn on the EMD safety relay outputs. If the jog button is
released before the 100 second time, the EMD safety relay outputs turn off. If
the jog button is held longer than 100 seconds, the EMD safety relay outputs
only turn on for 100 seconds.
Figure 51 - EMD - Jog
SI Safety Relay
(Cat.No.440R-S12R2)
The SI safety relay monitors a gate interlock with mechanical contacts in
Figure 52
. The SI safety relay is configured for automatic reset. When the gate
is closed, the SI safety relay outputs turn on if contactors K1 and K2 are already
off. The Start button can then be pressed to turn on contactors K1 and K2.
Figure 52 - SI Example
A1
L11
X32B1 B2
L12 18 38 4828
17 37 4727
A2
EMD
440R-EM4R2D
RANGE TIME
0
1
2
3
4
5
6
7
8
9
1
2
3
4
5
67
8
10
9
S11
S12
S21
S22
S34 A1 13
L11 A2 14
23
24Y32
SI
440R-S12R2
RESET
0
MM
AM
K1
24V DC
24V Com
K2
K6
K5
K3
K4
Reset Jog
To PLC
K1
K2
K3 K4
K5 K6
K1
24V DC
24V Com
K2
Start
Stop
To PLC
K1 K2
S11
S12
S21
S22
S34A1 13
L11 A2 14
23
24Y32
SI
440R-S12R2
RESET
0
MM
AM