Allen-Bradley Guardmaster - DIS Safety Relay Wiring Examples

Rockwell Automation Publication 440R-UM013E-EN-P - March 2017 55
Application and Wiring Examples Chapter 9
In Figure 45, a DI safety relay monitors a safety mat and non-contact interlock
with OSSD outputs. Make note of the specific wiring for the mat. Also, during
configuration and for each power-up, the mat must be clear and the interlock
closed. The DI safety relay must be configured for AND logic for the two
inputs. The DI safety relay logic setting is 6: (IN1 AND IN2) OR L12 with
automatic reset. The DI safety relay verifies that contactors K1 and K2 are off
by monitoring the mechanically linked normally closed contacts in the S34
circuit. When the DI safety relay is off, the auxiliary signal at terminal Y32
turns on and reports the status to a PLC. Per ISO 13856-1, safety mat
applications require a manual reset function. For fault detection purposes, all
GSR relays used for safety mat control must be configured for monitored
manual reset.
Figure 45 - With a Safety Mat and Device with OSSD Outputs, Monitored Manual Reset, AC Loads
DIS Safety Relay
(Cat.No.440R-D22S2)
Figure 46 shows the DIS safety relay with only one device. The DIS and DI
safety relay can monitor one device by configuring the relay for OR logic. The
DIS safety relay logic setting is 1: (IN1 OR IN2) OR L12 with monitored
manual reset. The second input (terminals S32 and S42) requires no
connection. With solid-state outputs, the contactors K1 and K2 must be 24V
DC powered coils. The DIS safety relay verifies that contactors K1 and K2 are
off by monitoring the mechanically linked normally closed contacts in the S34
circuit. When the DIS safety relay is off, the auxiliary signal at terminal Y32
turns on and reports the status to a PLC.
Figure 46 - Single Input, Monitored Reset
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
To PLC
K1 K2
L1
120/230V AC
N
Reset
OSSD1
OSSD2
LOGIC
0
1
2
3
4
56
7
8
DIS
440R-D22S2
S32 A1
Y32
S21S11 S22 S12 S34S42
L12 L11
34A2 44
14 24
K1
24V DC
24V Com
K2
Reset
To PLC
K1 K2