Rockwell Automation 1440-PK02-05M2 XM-720 Machine Monitor - Manual (Page 30)

Publication GMSI10-UM001C-EN-E - June 2011
30 Installing the XM-720 Machine Monitor
Figure 2.16 4-20mA Output Connections
Connecting the Setpoint Multiplication Switch
You can configure the XM-720 monitor to multiply the alarm setpoints, or
inhibit the alarms during the start-up period. This can be used to avoid alarm
conditions that may occur during startup, for example, when the monitored
machine passes through a critical speed.
The startup period and the action to take when the setpoint multiplier switch is
closed in predefined in the provided configuration files. These settings can be
changed using the XM Serial Configuration Utility. Refer to Alarm Parameters
on page 46.
Wire the Setpoint Multiplication switch to the XM-720 back panel as shown in
Figure 2.17.
ATTENTION
The 4-20mA outputs must be grounded at a single point.
Connect the 4-20mA Return signal to chassis ground at the
XM-720 end through the 4-20mA (-) terminal. Do not
ground the 4-20mA return elsewhere.
ATTENTION
If a 4-20mA output is not used, a jumper must be wired
between the unused 4-20mA terminals (terminals 25 and
26 for channel 1; terminals 28 and 29 for channel 2),
otherwise the associated meter on the front panel will not
function properly.
Channel 2 4-20mA output is
not being used. Therefore a
jumper from terminal 28 to
29 is required.