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11 Peripheral Devices
Voltage/Thermal Probes
The QS873A Voltage/Thermal Probes (VT-Probes) are used to measure battery temperatures for slope
thermal compensation, and to measure battery voltage for battery voltage imbalance detection. They
convert temperature measurements into serial data and transmit them to the system controller using
the 1-Wire® bus from Maxim. They can also send battery voltage measurements to the system
controller when used with the ES771A Remote Voltage Monitor. All probes are provided with a ptc
device to protect against accidental short circuit during voltage measurements. Note: The CPS6000
system cannot use the thermal probes that are used with other ABB Power systems, e.g., CPS4000. The
QS873A VT-Probes have a case that is used for weatherproof installs.
QS873A VT-Probe
J2
This 3-position connector serves to connect the VT-Probe to the Distribution Module using the
H569-470GB (848719715) cable. It may also be connected to the ES771A Remote Voltage Monitor
Module or be connected to other VT-Probes in daisy chaining using either the H569-470GC (848719803,
5-ft) or the H569-470GD (848719811, 10-ft) cable.
This connector also serves to connect the VT-Probes to the ES771A in making voltage measurements
by using the H569-470GF (848719829) cable. This cable terminates on one end in a right-angled
snap-fit connector and on the other end with a connector pin-socket. The pin-socked end of the cable
is to be inserted into either of the two unused pin housings of the connector. See Installation
Instructions for more details.
J1
This 2-position connector serves to connect the VT-Probe to J2 on other VT-Probes in daisy- chaining
them together.
Page 135
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J1
J2
Plug wires into the probe prior to placing
the probe into the case
Place probe in the case and make sure the
case pin inserts into hole in the board.
Figure 11-1: QS873A Voltage/Thermal Probe (VT-Probe)
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