Rockwell Automation Guardmaster Allen-Bradley 440R-S35001 - Threshold Settings

Rockwell Automation Publication 440R-RM003A-EN-P - July 2021 13
Chapter 2 CU3 Control Unit
Figure 2 - Terminals and Panel Space [mm (in.)]
]
Threshold Settings Figure 3 shows the adjustment locations.
To access the voltage threshold adjustment on the CU3 control unit, use a
screwdriver to pop open the cover. Use a screwdriver to rotate the
potentiometer to the desired setting.
The MSR55P safety relay potentiometers are on the front face. Use a
screwdriver to adjust both the voltage threshold and the desired time delay so
the motor can achieve a safe standstill motion.
Figure 3 - Threshold and Delay Settings
A2 • Z2 • X2 14 24 32
A1 • Z1 • X1 13 23 31
45 (1.89)
45 (1.89)
104 (4.09)
73 (2.87)
53 54 L1 L2 L3
X1 X2 X3 11 23 33 43
12 24 34 44
A3 A4 ON ERR A1 A2
OUT
ERR
PWR
.2 .4
.7
MSR55P
1
1.5
2
3
4
.5
.3
.2
.7
t
s
V
m
1
1.5
2
3
4
6
.5
.3
332311 43
53
342412 44
54
Power
Stop
Fault
Run
CU3
Zero Speed
Control Unit
53 54 L1 L2 L3
X1 X2 X3 11 23 33 43
12 24 34 44
A3 A4 ON ERR A1 A2
OUT
ERR
PWR
.2 .4
.7
MSR55P
1
1.5
2
3
4
.5
.3
.2
.7
t
s
V
m
1
1.5
2
3
4
6
.5
.3
332311 43
53
342412 44
54
Voltage
Threshold
Adjustment
Voltage
Threshold
Adjustment
Time Delay
Adjustment
CU3
MSR55P