Cumberland 064-11343, Руководство по установке

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Chapter 5: Expansion Box and Virtual Expansion Box Installation
examples of sensors that you can use with the system: temperature probes, humidity probes, static pres-
sure probes, water meters, dry contacts.
What You Should Know
The most common sensors used in a livestock room/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 gauge of 18 AWG (diameter of 1.02mm or cross sectional area of 0.82mm 2 ) 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.
WARNING
Installation must only be performed by qualified service personnel.
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 ( diameter of 1.29mm or cross sectional area of 1.30mm
2 ) to 18AWG
(diameter of 1.02mm or cross sectional area of 0.82mm 2 ).
Refer to the wiring diagrams for more information.
Connecting a Variable 0-10 VDC Output
The terminals used for 0-10 VDC outputs are named VAR (x) on the plug-in module. 0-10 VDC output
returns are named GND (x) for outputs VAR (x). The maximum current of each 0-10 VDC output is 20
mA. The output impedance must be at least 50 Ohms. There are only a total of four 0-10V outputs on a
card. You can either use these to internally control the EDGE variable modules, or to externally control
another device. For each of these four outputs, you can only use the 0-10VDC output terminals OR the
white variable output module (SSR) connector, not both.
What You Should Know
NOTE: A minimum wire gauge of 18 AWG (diameter of 1.02mm or cross sectional area of 0.82mm 2 ) 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. The maximum current of each 0-10
VDC output is 20 mA. The output impedance must be at least 50 Ohms The 0-10 VDC output fol-
lows the variable output module (SSR). Each 0-10 VDC is in parallel with a 0-10 VDC variable
output module (SSR) control output.
NOTE: The maximum current of each 0-10 VDC output is 100 mA on the EDGE 4IN-2V-8DO.
72 890–00687 EDGE 2