Cumberland EDGE 890-00601, Инструкция по установке и эксплуатации

Страница: 34 / 258

Chapter 2: Basic connections
IMPORTANT:
The maximum voltage on the relay outputs is 24 VDC with a maximum current of 1.5
A.
The minimum permissible load on the relay outputs is 0.1A.
Refer to the local building code to determine the type and quality of cable required.
NOTICE
If a siren is used, the siren output must not exceed 120 decibels. Use an
external power supply to the siren.
NOTICE
For the small terminal blocks used for inputs and low voltage outputs, use a
tightening torque from 0.5N*m (4.43lbf*in) to 0.6 N*m (5.2lbf*in) to fasten a wire
gage from 16AWG to 18AWG.
Connecting an analog input
A variety of different sensors can be hooked up to the system to monitor various inputs. Analog inputs
can be set in 0-5V mode, in dry contact mode, in 4-20mA mode, and in temperature mode. Some exam-
ples of sensors that you can use with the system: temperature probes, humidity probes, static pressure
probes, water meters, dry contacts.
What You Should Know
The most common sensors used in a livestock house/barn (like temperature sensor, relative humidity
sensor and static pressure transmitter) are already part of the built-in equipment list. The specifications
are automatically set when such a sensor is configured.
NOTE: A minimum wire gage of 18 AWG (1 mm2) is required for proper operation. The maximum cable
length allowed (including cable extensions) is 150 m (500 feet). The cable must be twisted and
shielded. Sensors needing a DC supply have the possibility to use 24 VDC outputs. Ensure to use
the 24 VDC returns close to each 24 VDC output. The maximum current of each 24 VDC output is
50 mA.
IMPORTANT: Make sure each sensor is connected to the proper GND. False alarms can result if the
wires are not properly connected.
CAUTION
Disconnect supply before servicing.
WARNING
Lock the enclosure when wiring is complete or when servicing. Use the nut and bolt
included or a padlock (not included) to lock the enclosure.
NOTICE
For the small terminal blocks used for inputs and low voltage outputs, use a
tightening torque from 0.5N*m (4.43lbf*in) to 0.6 N*m (5.2lbf*in) to fasten a wire gage
from 16AWG to 18AWG.
Refer to the wiring diagrams for more information.
34 895-00693 EDGE