Rockwell Automation 1405-M620 Operating Instructions - Manual (Page 5)

Units are rated 120V or 240V but not both. A 120V
unit will not accept 240V, and a 240V unit will not
accept 120V.
Publication 1405-IN002C-EN-P - November 2004
Bulletin 1405 (M620) Operating Instructions 5
A unit with the 120V supply option is not designed to operate on
240V or any other voltage. Likewise, a unit with the 240V supply
option is not designed to operate on 120V or any other voltage. Units
designed for 400V and 480V operation do not have an auxiliary
supply connection and receive power from the measurement line.
Ensure that each unit is properly supplied with a power source that
matches the voltage designation of your unit.
Relay Output Connections
Alarm and energy pulse relay contact connections are made to the
spring-clamp wire terminals on the 12-pin connector block, as
follows:
Table 1 Alarm and Energy Pulse Relay Contact Connections
Alarm: Terminals 7 - 8
Energy pulses: Terminals 9 - 10
Measurement Operations Immediately after the instrument is switched on, the software version
is first displayed for 8 seconds, after which the measured values are
displayed. The measured parameter that is displayed when the
instrument is switched on will be the main displayed parameter group
that was on display when the instrument was switched off. This will
happen regardless of whether the instrument was in the “constant
parameter” or auto-sequencing display mode at that time the
instrument was switched off.
In the “constant parameter” display mode, any one of the 6 parameter
groups can be manually selected, by forward or backward sequential
stepping, using the “+” or “-“keys. Only that parameter will be
displayed, until another parameter is manually selected, or the
instrument is switched to auto-sequencing display mode. Some of the
parameter groups (current, power, and energy) have a main displayed
parameter and also additional parameters within the same group. The
additional parameters can be accessed when the instrument is
displaying the main parameter of that group. For example, when the
instrument is displaying current measurements, the main parameter
IMPORTANT