012-527-B2 Rev F
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5.6 Signal Wiring Connections for CXCI/CXCI+
To aid the user with installation, frequent reference is made to drawings located at the rear of this manual.
Custom configurations may be detailed within the Alpha power system documentation package.
For terminal block connections, the recommended wire sizes are 0.14 to 0.75mm
2
(#26 to #18 AWG) for the
temperature range of 0 to 50°C (as per UL/CSA).
CAUTION: to reduce risk of fire, use only 0.14mm
2
(#26 AWG) or larger wire.
5.6.1 Alarm (Relay) Outputs
Terminals provide contacts for extending various alarm or control signals. Each relay output can be wired for NO
or NC operation during an alarm or control condition. See Figure 9.
Figure 9–Showing relay connections
Relays can be programmed to energize or de-energize during an alarm condition (see CXC Software manual).
When the CXCI/CXCI+ reset button is pressed or power is lost, all relays de-energize.
5.6.2 Digital Inputs
The digital input channels (factory-installed) are used to monitor various alarm and control signals. All input
channels are voltage activated and accept a bipolar (i.e. negative or positive) DC signal directly.
D1 and D2 on TB12 are available for customer conections as required.
5.6.2.1 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.,
positive input for +24V systems. The other input terminal is wired to the Ground (common) of
the system through a relay (dry contact – usually located on the equipment requiring
monitoring). This method (see Figure 10) allows the digital input to receive (or not receive) a
Ground signal on an alarm.
Figure 10–Showing digital input connection method