Allen-Bradley Guardmaster - Power Supply and Input Signal Checks

Rockwell Automation Publication 440R-UM013E-EN-P - March 2017 65
Troubleshooting Chapter 11
Check the Power Supply
(Step 2)
The second troubleshooting step is to check the supply of power to your relay.
Check Voltage
If the PWR/Fault indicator is OFF, check the voltage by placing a digital
multimeter on terminals A1 and A2 as shown in Figure 58
.
Figure 58 - Measure Power Supply Voltage
If the voltage is not within the acceptable range, verify that the power supply,
wiring, circuit breakers, and/or fuses are functioning properly.
Table 12 - PWR/Fault Status Indicator Is Green with Flashing Red
Indicator Description Model Possible Causes Corrective Action
Green with
flashing red
2 times
The configuration does not agree
with the EEPROM.
All
One or more of the rotary switches have changed
during operation.
The safety relay continues to operate, and the
switches can be returned to their original
position, while powered.
EMD
On Version 200, B1 was jumpered to B2 after
configuration. In Version 203, this condition is
ignored.
Remove the jumper and the EMD functions
properly.
Green with
flashing red
3 times
B1-B2 connection. All
B2 is connected to B1, after configuration. The
fault indication occurs when the EMD output is
energized. If the output is already energized, this
fault will be detected on the next energization of
the EMD.
• Remove connection and fault is cleared
automatically.
• See additional information in EMD Expansion
Relay B1/B2 Inputs (Step 7) on page 86.
Green with
flashing red
4 times
Retriggerable input. EMD
Set for non-retriggerable and Logic IN input has
turned off and then back ON before the time
expired.
Cycle the Logic In input signal to clear the fault or
let the timer expire and the fault clears
automatically.
A connection was made from terminals B1 to B2,
after configuration.
Repeat the configuration process; the B1-B2
connection must be made before configuration.
See additional information in EMD Expansion
Relay B1/B2 Inputs (Step 7) on page 86.
OUT
PWR/Fault
13 23
33
41
A1
S11
S21
42
S22
14
S34
24
34
CI
14 24
34
42
A2
13 23 33
41
S12
L11
IN
0
MM
RESET
AM
IN
PWR/Fault
S12
S22
A1 A2
S11 S21
34
L11
14
Y32
24
23
S34
SI
OUT
0
MM
RESET
AM
13
14
23
24
24
Volts
DMM
24
Volts
DMM
A1
A1
A2
A2
Acceptable Range
20.4…26.4V DC
CI
SI, DI, DIS, EM,
and EMD