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Remote Voltage Monitor Module
The ES771A Remote Voltage Monitor Module connects to the Auxiliary Port Connector on controller. It
takes the voltage measurements from the VT-Probe and transmits them to the system controller in
performing voltage imbalance detection. It also transmits the thermal data from the VT-Probes for
slope-thermal compensation.
Distribution Module or
J10, J20
RJ-45 connectors that connect the ES771A to the Distribution Module or to another ES771A using
848652947 cable or other appropriate cable assemblies.
J30
Connects the ES771A to the VT-Probes using either the 848719803 (5-ft) or the 848719811 (10-ft) cables.
J1, J2, J3
Input connectors for the battery voltage from the VT-Probes. They accept the right-angled snap-fit
connectors on the 848719829 cable assemblies.
ID Switch
A seven-position rotary ID switch used by the QS841A to individually address the ES771A. A setting of 0
produces and invalid ID alarm. Valid ID settings are from 1 through six.
Status LED
The module illuminates its green LED when plugged into the 1-wire network and with the VT-probe
attached to negative battery terminal of the mid-string voltage. The LED will illuminate red when the
controller determines that one or more of the strings from the unit has exceeded the Mid-String
Voltage threshold and time considerations.
Following is a summary of the parts utilized in the 1-Wire management system
Item
QS873A Environmentally protected battery thermal probe (H569-470 GA)
10-ft (3m) Wire set to connect QS873A to system (H569-470 GB)
5-ft (1.5m) Battery thermal probe interconnect wire set (H569-470 GC)
10 ft. (3m) Battery thermal probe interconnect wire set (H569-470 GD)
ES771A Voltage Monitoring Module (H569-470 GE)
Probe to ES771A Voltage Monitor Cord, 10-ft (3-mm) wire set (H569-470 GF)
Battery Voltage Monitor Cord, 10-ft (3-m) wire set (H569-470 GG)
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Other ES771A
VT-Probe
Figure 11-2: ES771A Remote Voltage Monitor Module
Status LED
Battery Voltage
From VT-Probes
ID Switch
Ordering code
108987611
848719795
848719803
848719811
108958422
848719829
848652947
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