Four Channel Relay Card Operator’s Instruction Manual DETCON, Inc. 4055 Technology Forest Blvd. Suite 100, The Woodlands, Texas 77381 Ph.281.367.4100 / Fax 281.298.2868 www.detcon.com March 19, 2014 • Document #5155 • Revision 1.
4 Channel Relay Card This page left intentionally blank Four Channel Relay Card Instruction Manual ii
4 Channel Relay Card Table of C ontents 1.0 Introduction.............................................................................................................................................. 1 1.1 Description ........................................................................................................................................... 1 1.2 I/O Connections....................................................................................................................................
Channel Relay Card This page left intentionally blank Shipping Address 4055 Technology Forest Blvd. Suite 100,., The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • www.detcon.com • sales@detcon.
4 Channel Relay Card 1.0 Introduction 1.1 Description The Detcon Four Channel Relay Card provides a low cost means of adding gas detection alarms to a fire alarm panel. The Relay Card is designed to interface up to four analog 4-20mA gas detection sensors and supports three programmable alarm levels for each channel. Any 4-20mA gas sensor can be used with this card. The sensor inputs are continuously monitored by an A/D converter and microcontroller.
4 Channel Relay Card 1.2.4 Reset Switch Input The reset/silence switch uses a 2-pin connector (Detcon p/n 306-175701-900). The reset connector allows for the use of an external, normally-open, momentary push-button switch to reset and/or silence alarms (Figure 1). When the switch is closed, it will reset any latched alarms or silence any Silenceable alarms.
4 Channel Relay Card 2. Connect the sensors to the Relay Card via the three pin connectors labeled CH1, CH2, CH3, and CH4. The connectors provide Power, Power Return, and mA connections for the sensors and are labeled as ‘GND’, ‘PWR’, and ‘mA’. Refer to Figure 1. 3. Connect incoming power to the two pin power connector. (located on the lower left corner of the RELAY CARD.) The input voltage has to be 12 to 28VDC for the Relay Card and the sensors to operate correctly.
4 Channel Relay Card Table 1 Examples of Alarm Configuration S W 12 60 % S W 11 55% S W 10 50 % SW 9 45% SW 8 40 % SW 7 35% SW 6 30 % SW 5 2 5% SW 4 20% SW 3 1 5% SW 2 10% SW 1 EN M eaning OFF OFF X OFF OFF OFF OFF OFF OFF X OFF OFF OFF OFF ON OFF X ON OFF OFF OFF OFF OFF X OFF OFF OFF OFF OFF OFF X OFF OFF OFF OFF OFF ON X OFF ON OFF ON OFF OFF X OFF OFF OFF OFF OFF ON X OFF OFF OFF ON OFF OFF X ON OFF OFF OFF ON ON X OFF OFF OFF ON O
4 Channel Relay Card 3.2.1 Silencable or Non Silenceable Alarms 1, 2, and 3 can be configured as Silencable or Non-Silenceable. In order for an alarm to be Silenceable, the corresponding DIP switch must be set to Silenceable, and an external ‘Normally Open, Momentary Closed Switch’ must be connected to the ‘Reset’ connector on the Relay Card.
4 Channel Relay Card 4.0Troubleshooting Guide Problem Potential Cause(s) Fault active Sensors not receiving power Alarm Relay Active when sensor(s) is not in alarm More than 3 alarm levels are set on an active channel No alarm levels are set on an active channel 4-20mA input is not connected to the Channel 4-20mA input is below 2.
4 Channel Relay Card 6.0 Warranty Detcon, Inc., as the manufacturer, warrants under intended normal use each new Four Channel Relay Card to be free from defects in material and workmanship for a period of one year from the date of shipment to the original purchaser. Should the Relay Card fail to perform in accordance with published specifications within the warranty period, return to Detcon, Inc., for necessary repairs or replacement.
4 Channel Relay Card 7.0Revision Log Revision 1.1 1.2 Date 04/18/12 03/19/14 Changes made Updated with corrections Updated, & reformatted with various corrections and clarifications Approval LU LU Shipping Address 4055 Technology Forest Blvd. Suite 100,., The Woodlands Texas 77381 Mailing Address: P.O. Box 8067, The Woodlands Texas 77387-8067 Phone: 888.367.4286, 281.367.4100 • Fax: 281.292.2860 • www.detcon.com • sales@detcon.com Four Channel Relay Card Instruction Manual Rev.1.
