Owner's manual

Galaxy Pulsar Edge Power System Controller
Issue 3 October 2011 128
case of loss of communication to the QS871As or failed or removed controller ). The configured
disconnect and reconnect values assigned to a particular LVD function are sent from the
controller to each respective QS871A. In the advent of a controller failure the QS871As will
utilize their individual voltage monitoring and these thresholds to disconnect and reconnect the
contactor.
7-Position ID Switch: Rotary 8-position switch that uniquely identifies up to seven remote
distribution monitor and control modules. ID position 0 is invalid. The Pulsar Edge can address
up to eight unique distribution monitor and control modules.
Note: The majority of applications that utilize the QS871 utilize the QS871A. There are versions
of the QS871 that are used in special applications where components have been removed because
the feature was not required. These versions and the feature set are high-lighted below.
Feature
QS871A
QS871B
QS871C
Inputs
Open String input
X
X
X
Fuse Alarm Major input
X
X
Remote LVD Input
X
Auxiliary Alarm Input
X
Shelf ID Input
X
X
Misc
Status LED X X X
Rotary ID Switch (7-position)
X
Contactor Drive And Monitor
X
X
Momentary Forced Closed LVD switch
X
X
Reverse Battery Detection feature
X
X
Backup Contactor Disconnect/Reconnect
Feature
X
X
Analog Monitoring
Shunt Monitoring Circuitry
X
X
X
DC Bus Monitoring Circuitry
X
X
X
Connectors
Power/Shunt/OS/FAJ connector X X X
Shielded RJ-45 connectors
X
Remote LVD and Aux alarm connector
X
Contactor Control Connector
X
X
Connector Definitions
The QS871A module has five connectors: two RJ-45 connectors used for serial communication to
ES773A VT-Probes, ES771A Remote Voltage Monitoring Modules, and the Pulsar Edge Pulsar