Instruction Manual

Pulsar Plus Controller Family
Issue 7 December 2011 107
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
Module 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 a Pulsar Plus family controller and three
connectors for monitoring circuit breakers, contactors and shunts. The connectors are defined as follows.
J1
Provides the connections to external distribution module’s bus voltage and power, shunt inputs and
reference, Fuse Alarm Major And Open String Inputs, and shunt.
Table 37 QS871 J1 Signal Description
Pin # Signal Name Signal Description
1 VPWR- VBUS(-) or BATT- Power. Power and board reference for QS871, connect to
Non-Grounded side of the DC bus (-48V).
2
VPWR+
VBUS (+) Power and Positive Sense voltage for backup monitoring.
3
BATT-
Discharge Battery (BAT) input connected to the Non-Grounded side of the DC
bus (-
48V). Used as sense voltage for backup monitoring, reverse voltage
detection, and force contactor closed.
4 SHUNT+ Positive Battery Shunt input signal whose signal polarity is defined by the
voltage on the shunt during battery discharge.
5 SHUNT- Negative Battery Shunt input signal whose signal polarity is defined by the
voltage on the shunt during battery discharge