Hybrid Ultra
855-350-050_Rev2.0_Instruction Manual
Page
7
of 84
NOTICE
All DC outputs of ICT’s DC power systems are isolated from
chassis ground (floating). DC output returns can remain isolated
from ground (DC-I) or can be grounded (DC-C), as per site
grounding requirements and/or local or national electrical codes.
Ensure that all relevant electrical code standards are followed.
Connect an 8 AWG ground bonding wire from the chassis ground stud to a
nearby common grounding point.
2.7
Sensor and Alarm Connections
1.
The ALARM connector allows the Hybrid Ultra to report faults to an
external monitoring device through a form-C contact. If needed,
connect form-C contact monitoring wiring to the ALARM connector
as shown in Table 5. On the system, the primary chassis contacts
are flagged for all system alarms while the secondary chassis
contacts indicate secondary Power Module faults only. Use 22–26
AWG wire. Refer to Tables 18–22
for which conditions will trigger a
form-C alarm.
Table 5. Alarm Output Connector
Pin Number
Name
Function
1
NC
Alarm NC (alarm state)
2
NO
Alarm NO (alarm state)
3
Common
Alarm output common
2.
The AUX connector allows the Hybrid Ultra to monitor up to four
external form-C circuits and a battery temperature probe.
3.
Connect the external Battery Temperature Sensor (ICT-TMP,
included with a BMMD-equipped system, for use with lead-acid
batteries only) to the AUX connector as shown in Table 6. This will
allow the Hybrid Ultra to compensate for the output voltage
according to the battery temperature. Use 22–26 AWG wire.
Table 6. Remote Input Connector
Pin Number
Name
Function
1
Alarm 1
Alarm 1 input
2
Alarm 2
Alarm 2 input
3
Alarm 3
Alarm 3 input
4
Alarm 4
Alarm 4 input
5
Alarm Return
Common alarm return
6
Bat Temp
Battery temperature sensor
7
Bat Temp
Battery temperature sensor return