9400000-J0 Rev E
24
7.7 Signal Wiring Connections to L-ADIO Board
For terminal block connections, the recommended wire sizes are 0.823 to 0.129mm
2
(#18 to #26 AWG) for the tem-
perature range of 0 to 50 deg. C (as per UL/CSA).
CAUTION!
To reduce risk of fire, use only 0.129 mm
²
(#26 AWG) or larger wire.
7.7.1 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 (4.1.1).
Relays can be programmed to energize or de-energize during an alarm condition (see CXC-HP Software manual).
When the CXC reset button is pressed or power is lost, all relays de-energize.
7.7.2 Digital Inputs
The digital input channels are used to monitor various alarm and control signals. All input channels are voltage acti-
vated and accept a bipolar (negative or positive) DC signal directly.
Connection Method
Typical 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. For example, the positive input for +24 V systems. The
other input terminal is wired to the Ground (common) of the system through a dry contact relay usually located on
the equipment requiring monitoring. This method allows the digital input to receive or not receive a Ground signal on
an alarm.
Figure 8 — Relay Connections in the De-energized State
Figure 9 — Digital Input Connection Method
