010-619-J0 Rev B
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Bundle the signal cables together and route them through the entry holes of the shelf.
Figure 24:
Signal Wiring Terminal Blocks (030-851-20 shown)
6.9.1
Analog Inputs
CAUTION
:
Ensure the correct polarity is used for all input cable terminations.
Ensure the correct polarity is used for all input cable terminations.The analog input channels are used
to monitor various types of electrical signals. The Voltage Input is -60 to +60Vdc. The Temperature Input
(designed for Alpha supplied temp sensor only) is 0 to 5Vdc with power source.
Voltage
Voltage Input #1 (V1) terminals on the shelf provide connections to an optional secondary voltage input.
Voltage Input #2 (V2) is wired internally to the rectifier output voltage of the shelf. This is used as the
reference for Voltage regulation of rectifiers, system alarming (such as high voltage) and control (such
as LVD).
See the software manual for information on configuring Alarms and LVD control. The Battery -48V
should be connected at the battery system voltage terminal, if applicable, for redundant power feed to
the CXCM1 series controller when a battery disconnect device is used. It is critical to controller opera-
tion as it ensures an auxiliary source of power to the controller should the disconnect device open the
circuit.
Current
Current input #1 (I1) is wired internally to the system current shunt.
Temperature Sensor
Temperature Probe input channels (T1, T2) provide connections for up to two temperature sensors. A
voltage is supplied to these terminals for sensor measurements.Temperature sensors are available
from Alpha in various lengths.
6.9.2
Digital Inputs
The digital input channels (D1, D2) are used to monitor various alarm and control signals. All input chan-
nels are voltage activated and accept a bipolar (i.e. negative or positive) DC signal directly.
For shelf modules with integrated distribution, D1 is wired internally for CB/fuse trip. D2 is available for
customer connections as required.
Connection Method
Typical Alpha systems use the “reset with Hot and trigger with Ground” connection. The digital input is
wired in such a way that the Hot is wired directly into one of the input terminals; e.g., negative input for
-48V systems. The other input terminal is wired to the Ground (common) of the system through a relay
H
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