Vertiv | Liebert
®
RX
™
Remote Distribution Cabinet User Manual | 26
The CPM annunciates alarm messages for the following conditions. Alarm thresholds for
monitored parameters are adjustable through the service port to match site requirements. The
alarms and their factory setpoints for the alarms are:
Summary Alarm—detects and annunciates upon occurrence of any alarm.
Summary Alarm Contacts—The CPM has a Form C (1 NO and 1 NC) summary alarm contacts
for remote alarm status. The contacts are rated at 24VAC @ 1A. The contacts change state when
any alarm or warning occurs and reset when the alarm is cleared.
To facilitate troubleshooting, all alarms are stored in non-volatile memory to protect against
erasure by a power outage. Alarms must be manually reset after alarm conditions are corrected.
Communication—Remote communication and summary alarm connections are available.
A Liebert IntelliSlot
®
card provides connection to a Building Management System (BMS) or to
Liebert SiteScan
®
monitoring using RS485, see Figure 9. The following cards are available:
• IS-WEBS card for SNMP/Web output to Ethernet LAN
• (IS-485S card for Modbus 485 output using a two-wire connection
• IS-IPBMS card for Modbus IP output using an RJ-45 connection
• IS-UNITY-DP card for HTTP/HTTPS, Vertiv Protocol, e-mail, SMS, SNMP v1/v2c/v3, BACnet IP/MSTP
and Modbus TCP/RTU output using a serial RS-485 two-wire connection
Check the Liebert IntelliSlot ports on the back of the door to determine which cards are supplied;
more than one card might be supplied. See Figures 7, 8 and 12 for location and connection
details.
Alarm Default Setpoint
• Overvoltage A line-to-line voltage is more than 6% above
nominal
• Undervoltage A line-to-line or line-to-neutral voltage is 13% below
nominal
• Neutral Overcurrent Current exceeds 95% of breaker amps
• Ground Overcurrent Current exceeds 5 amps
• Phase Overcurrent
Warning
Current exceeds 75% of breaker amps
• Phase Overcurrent Current exceeds 80% of breaker amps
• Summary Alarm
WARNING
Risk of electric shock. Can cause personal injury or death.
Verify that the panelboard voltage (power) circuit is de-energized and locked out before
installing branch breakers and cables.
To Next Page
Loading...
