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9400016-J0 Rev D
7.6 Alarm and Signal Connection
The I/O capabilities of the CXPS-E3 system allow the user to extend various alarm or control signals to an external
site monitor via output relays or monitor various analog and digital signals via analog and digital inputs.
For terminal block connections, the recommended wire sizes are 0.14 to 1.50mm² (#26 to #16 AWG) for the tempera-
ture range of 0 to 75° C (as per UL/CSA).
Route via wire-ways and use existing cable clamps / lances to secure to existing (factory) wire harness along with
customer run signal wires. Ensure signal wires are routed along hinge point of front door so door opening and clos-
ing won’t require excess wire slack. Refer to Figure 12 for wire routing example.
Terminal block connections for the L-ADIO should be routed along the left side of the E3 (looking at unit from front).
Connections to the CXCI+ and 8R/8D ADIO should be routed along the right hand side of the E3. Refer to the cus-
tomer connections (“–08”) drawing at the rear of this manual for details on terminal block assignments.
7.6.1 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.
Relays can be programmed to energize or de-energize during an alarm condition. See controller software manual for
programming.
7.6.2 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 (i.e. negative or positive) DC signal directly.
7.6.3 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 ter-
minals; e.g., negative input for 48V systems. The other input
terminal is wired to the Ground (common) of the system
through a relay (dry contact – usually located on the equip-
ment requiring monitoring). This method (see Figure 25)
allows the digital input to receive (or not receive) a Ground
signal on an alarm.
Table H —
Voltage level definitions for digital inputs
Voltage Range (Vdc)
Voltage Level (Vdc)
Considered As "0" (Off)
Voltage Level (Vdc)
Considered As "1" (On)
-60 to +60
(system voltage setting)
-1 to +1
(-60 to -5) or +5 to +60)
CAUTION!
To reduce risk of fire, use only 0.14mm² (#26 AWG) or larger wire.
Figure 24 — Alarm (Relay) Connections
Figure 25 — Digital Input Connection Method
