GE Industrial Solutions Pulsar Plus Controller - Manual (Page 96)

Pulsar Plus Controller Family
Issue 7 December 2011 96
VT-Probe Connect to Controller
Step Action
8 Repeat Step 7 until all probes are installed.
9 The controller is now able to make thermal measurements in performing Slope Thermal
Compensation (STC). To enable or verify that STC is active go to
MenuConfigurationBatteriesBattery Temp Management and select TEMP COMP and
verify that the feature Temperature Comp is Enabled. If not, configure and save it
appropriately. Additional parameters associated with slope thermal compensation may be set
on the controller to customize this feature.
ES771A Remote Mid-String Voltage Monitor Module
The ES771A remote mid-string voltage monitoring module is used to measure the mid-string voltages of up
to three strings of batteries. This unit utilizes an appropriate QS873A VT-Probe connection to obtain the
voltage for measurement. It then serially transmits the appropriate information to the system controller
which performs the voltage imbalance detection feature. It also serves as interface that transmits the
thermal data from the VT-Probes for slope-thermal compensation and other battery management features.
As with the QS873A VT probes, ES771A units also utilize Maxim’s industry standard 1-Wire® bus. Thus,
multiple ES771A devices can be used and placed in a daisy chain fashion along with the QS873A VT probes.
The number of Mid-string voltage modules actively hooked to batteries and being monitored by the system
controller to batteries is displayed under Batteries in the Status menu. Note: VT-Probes must be connected
to the batteries in order for the ES771 to be recognized.
The Pulsar Plus family of controllers can monitor up to six ES771A modules. Each ES771A module is
individually addressed so that specific mid-string voltages can be displayed and identified. A seven-position
rotary ID switch located on the unit must be set to a unique address number otherwise an ID conflict alarm
will be generated. Units are shipped out of the factory with a default ID setting of “one”. If additional units
are to be in the system the ID must be reconfigured. Note: there are systems that are shipped with ES771A
units installed and with proper configuration.
Figure 14: ES771A Remote Voltage Monitor Module
Following is a brief description of the interfaces on the QS873A VT-Probe depicted above.
J10, J20
RJ-45 receptacles that connect the ES771A to other ES771As or the 1-Wire interface port of the controller or
system provided 1-wire interface. Typical cables utilized are the (CC848791500, 4”) or (848652947, 10’)
cable.