601 Series - 3-Phase Voltage & Frequency Monitor

• 601 Series Datasheet

The Model 601 is a fully-programmable voltage monitor designed to protect 3-phase motors. It can be used as a stand-alone product or networked with an RM-1000, RM-2000, PLC, computer or SCADA system.

When a harmful condition is detected, the 601’s output relay is deactivated after the specified trip delay. The output relay reactivates after power line conditions return to an acceptable level for the programmed restart delay (RD2).

Eleven (11) setpoints are viewable with the 3-digit LED display or from a networked device:

low voltage
high voltage
voltage unbalance
low frequency
high frequency
RS485 address
trip delay for voltage/frequency faults
trip delay for single-phase faults
rapid-cycle timer (RD1)
restart delay after all faults (RD2)
type of restart after all faults (manual or automatic)

Six (6) parameters are viewable while the motor is running:


L1-L2 voltage
L2-L3 voltage
L1-L3 voltage
average voltage
voltage unbalance (%)
voltage frequency (%)


When used with the RS485MS-2W communications module, the 601 can communicate with most Modbus RTU master devices. Voltage conditions can be monitored and setpoints can be changed remotely using Solutions software, an RM-1000, RM-2000 or other device.