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ETDOC - Digital Output Control Boards

Features:

  • Two optically isolated relay outputs. 

  • Manual Output Override with position monitoring (ETDOC-U). 

  • Compact Size, Easy Wiring. 

  • LED indication for output and power supply status. 

  • Low cost, ideal for Energy Management Applications. 

Application:

The ETDOC provides two 5A rated relays that can be driven by a low voltage, low current control device. Two 5A rated toggle switches provide H-O-A function for each output.  The ETDOC-U model features additional outputs to allow for the monitoring of H-O-A override switch positions.  The ETDOC boards are ideal for interfacing remote HVAC equipment that may require local manual override (i.e roof top units, pumps , small fans etc.).

Product Description:

The ETDOC-2 is a two channel board that contains two independent SPDT (Form C) relays activated by any 10VDC, low current control device (i.e. standard DDC Digital Output points). The ETDOC-2 includes two 5A rated manual override switches that provide the H-O-A function. The ETDOC-2 inputs are optically isolated and, if powered by a dedicated 24 VAC transformer, this board may help eliminate ground loop problems.

The ETDOC-U is similar to the ETDOC-2 but it accepts any input voltage signal ranging from 8 V to 24 V, both DC or AC. This model offers two SPST (N.O.) outputs. It also features a provision for remote monitoring of the H-O-A switches. The auxiliary contact of each switch is used to provide its status information. The contact is closed in ‘Auto' position and terminated at a separate connector. The on-board jumper allows for separate or joined (AND function) monitoring of both switches position.

The boards are equipped with angular connectors for fast and easy wiring. They mount in a plastic molded snap-track (provided).

Specifications:

  ETDOC-2 ETDOC-2
Power:

24 VAC, less than 2 VA
Input: 10 VDC, maximum 15mA 8 to 24 VDC or VAC, 8mA @10VDC
Output: two independent relays; 5A @ 125 V
SPDT contacts		 two independent relays; 5A @ 125 V
SPST-NO contacts
Isolation: 1500 V minimum (input-output).
Isolated power supply (ie: control transfomer) must used for full isolation.
Indication: Output relay status (yellow LED)
Power ON (green LED);
HAND or OFF override mode - closed dry contact
Dimensions: W=2.75" ; L=3.2", boards mounts in TR-2 snap-track (provided).

Ordering Information:

ETDOC-2 : 10VDC input, SPDT (form C) contacts

ETDOC-U : 8-24VDC/VAC input, SPST-NO contacts, status indication

Information:


Datasheet		 PDF

Wiring Diagram
(ETDOC-2)		 PDF GIF

Wiring Diagram
(ETDOC-U)		 PDF GIF

copyright (c) Elkor Technologies Inc.