030-803-J0 Rev B
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Figure 8–Showing digital input connection method
6.10.2.2 Programming the Digital Input
The digital input channels can be programmed for “active high” or “active low.” Active high
indicates “alarm on the presence of a ground signal” and active low indicates “alarm on the
removal of a ground signal.” See CXC Software manual for detailed instruction on
programming.
Voltage Range (VDC)
Voltage Level (VDC)
Considered As “0” (Off)
Voltage Level (VDC)
Considered As “1” (On)
0—60
(system voltage setting)
0—3
18—60
Table A–Voltage level definitions for digital inputs
6.10.3 Analog Inputs
CAUTION: Ensure the correct polarity is used for all input cable terminations.
The analog input channels are used to monitor various types of electrical signals. Some of the analog channels
are reserved for specific signals, while others are designated as general-purpose inputs, which accommodate
various types of analog signals.
The B24V should be connected at the battery system voltage terminal for CXC reference when a battery
disconnect device is used. It is critical to CXC operation as it ensures a source of power to the CXC should the
disconnect device open the circuit.
6.10.3.1 Voltage
Voltage Input #1 (load voltage per CXC software) terminals (V1) on the shelf provide
connections to an optional secondary voltage input. For example, this can be terminated to the
load side of an LVD contactor to monitor load voltage.
Voltage Input #2 (battery voltage per CXC software) is wired internally (V2) to the rectifier output
voltage of the shelf. This is used as the reference for system alarming (such as high voltage)
and control (such as low voltage disconnect).
6.10.3.2 Temperature Sensor
Temperature Probe input channels provide connections for temperature sensors. A voltage is
supplied to these terminals for sensor measurements.
6.10.3.3 Current
Current Input #1 (discharge or load current per CXC software) terminals (I1) are available for
customer connection as required.
Current Input #2 (charge or battery current per CXC software) terminals (I2) are available for
customer connection as required.
