EnerSys alpha CXPS-E3, Руководство пользователя

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9400016-J0 Rev E 42
User Guide CXPS-E3
7.6 Alarm and signal connection
The IO 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
temperature range of 0 to 75° C (as per UL/CSA).
Route via wire-ways and use existing cable clamps or 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 closing won’t require excess wire slack.
Terminal block connections for the L-ADIO should be routed along the left side of the CXPS-E3 (looking at unit
from front). Connections to the controller and L-ADIO should be routed along the right hand side of the CXPS-E3.
Refer to the customer connections (“–08”) drawing at the end 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 the 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
activated and accept a bipolar (that is, 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
terminals; for example, 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 equipment requiring monitoring). This
method (see Figure 23) allows the digital input to receive
(or not receive) a Ground signal on an alarm.
Table I — Voltage level definitions for digital inputs
Voltage range (Vdc)
Voltage level (Vdc)
considered
As "0" (Off)
Voltage level (Vdc)
considered
A s "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 22 — Alarm (relay) connections
Figure 23 — Digital input connection method