Table 1-2 – ADC HiGain HMS-318 User Manual
Page 19
Chapter 1: Product Description
1-7
In the HMU/HLU configuration, for example, for detailed information about the different types of alarms, refer to the
“Managing Alarms” section in the
HMU-319, H2TU-C-319, or H4TU-C-319 User Manuals
. Specifically, the manual
describes the types of alarms the HMU-319 reports, when the alarm occurs, and how to respond to the alarm using
the ACO.
Table 1-2. Alarms Wire-wrap Field Functional Description
Alarm
Alarm Description
Function
CRIT AUD
Critical Audible
There is a critical alarm active on the HMS-318
List 3 shelf. Connect this relay to the critical
alarm audible indicator of the CO alarm
system.
CRIT VIS
Critical Visible
There is a critical alarm active on the HMS-318
List 3 shelf. Connect this relay to the critical
alarm visual indicator of the CO alarm system.
MAJ AUD
Major Audible
There is a major alarm active on the HMS-318
List 3 shelf. Connect this relay to the major
alarm audible indicator of the CO alarm
system.
MAJ VIS
Major Visible
There is a major alarm active on the HMS-318
List 3 shelf. Connect this relay to the major
alarm visual indicator of the CO alarm system.
MIN AUD
Minor Audible
There is a minor alarm active on the HMS-318
List 3 shelf. Connect this relay to the minor
alarm audible indicator of the CO alarm
system.
MIN VIS
Minor Visible
There is a minor alarm active on the HMS-318
List 3 shelf. Connect this relay to the minor
alarm visual indicator of the CO alarm system.
SYS ID
System ID
There is a critical, major, or minor alarm active
on the HMS-318 List 3 shelf. Connect this relay
to the equipment rack alarm indicator.
ACO
Alarm Cutoff
External Alarm Cutoff (ACO) function silences
active audible alarms (see
).
GND
Ground
External ground
EXT TEMP
External Temperature
Thermostat
Thermal control (digital temperature sensor).
Connect this pin to an external snap-action
thermostat to activate the fan relay. This
thermostat provides a switch closure to ground
that is sensed by the HMU-319.
NO COM FAN
Fan Control
The Fan Control manually disables a Fan
Assembly using the NO and COM fan control
contacts.