Distech Controls GS-CDR20K Series Manuel d'installation du matériel - Page 2

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After the base is screwed to an electrical box or the wall using the

appropriate holes, pull the wires through the wiring hole in the center of

the PCB and then reinstall it in the enclosure base. Ensure the PCB is

snapped into the base securely and correctly.

The mounting hole locations are shown in the following drawings:

Figure 2. Mounting Hole Locations

Wiring

Deactivate the 24 Vac/dc power supply until all connections are made

to the device to prevent electrical shock or equipment damage. Follow

proper electrostatic discharge (ESD) handling procedures when

installing the device or equipment damage may occur. Use 22 AWG

shielded wiring for all connections and do not locate the device wires in

the same conduit with wiring used to supply inductive loads such as

motors. Make all connections in accordance with national and local

codes.

This is a 3-wire sourcing device. Connect the plus DC or the AC

voltage hot side to the PWR terminal. The supply common is

connected to the COM terminal. The device is reverse voltage

protected and will not operate if connected backwards. It has a half-

wave power supply so the supply common is the same as the signal

common. Several devices may be connected to one power supply and

the output signals all share the same common.

Use caution when grounding the secondary of a transformer

or when wiring multiple devices to ensure the ground point is

the same on all devices and the controller.

The analog output is available on the CO

switch selectable for either voltage or 4-20 mA active output. In voltage

mode the output is selectable for either 0-5 or 0-10 Vdc via the menu

(the factory default is 0-5 Vdc). The current output operates in the

active mode and does not require a loop power supply (the signal

current is generated by the transmitter and must not be connected to a

powered input or device damage will result). Check the controller

Analog Input to determine the proper connection before applying

power. Both current and voltage signals are referenced to the COM

terminal. The analog output signal is typically connected directly to the

Building Automation System (B.A.S.) and used as a control parameter

or for logging purposes.

The optional relay output is on the N.O. RELAY terminals. The relay

output is completely isolated and has a Normally Open (NO) signal.

This signal can be used to directly control an alarm or ventilation fan.

The optional override switch is a two-wire dry contact normally open

switch contact. The slide pot is a two-wire resistive signal that can vary

from 0-10K ohms (for example) with left-to-right slide pot action. Other

resistive values are available on request and the slide pot may be

configured as normal or reverse acting. These options share a single

2/5

terminal. This signal is

common labelled S. COM and this is not connected to the power

supply COM.

The two-wire temperature sensor output is available with various RTDs

and thermistors to suit all control applications and is available on the

TEMP terminals.

Figure 3. Typical 4-20 mA wiring with 24 Vdc and all options

Figure 4. Typical 0-5 Vdc wiring with 24 Vac for CO

only