detcon inc. Detcon Model DA-1 Data Acquisition Module Data Aquisition Module DATA FAULT detcon inc. HOUSTON, TEXAS DA-1 MODEL NO. Operator’s Installation & Instruction Manual August 1, 2002 • Document #1970 • Version 1.
Table of Contents 1.0 Description 2.0 Modbus Communications 3.0 Alarm Status per Channel 4.0 Diagnostics 5.0 Enclosure Assembly 6.0 Dimensions 7.0 Wiring Diagram 8.0 Warranty 1.0 Description The Detcon Model DA-1 Data Acquisition Module is specifically designed for use where fire and gas sensor devices are networked over an RS-485 communications loop using Modbus™ RTU protocol.
Device # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 ... ... 255 485 Address 1 2 3 4 5 6 7 8 9 A B C D E F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C ... ... FF 3.0 Alarm Status per Channel The alarm status is constantly monitored by the on-board circuitry. Digital inputs will be monitored for either open or closed contacts and analog inputs for set point violations or under/over range.
5.0 Enclosure Assembly The DA-1 enclosure (PN976-047400-000) is CSA approved for use in Class I; Div 1, Groups B, C, D environments. The optional DA-1 wiring interface assembly (PN976-047400-000) includes 2 “T” style conduit outlet boxes rate Class I; Group D. 6.0 Dimensions 5.25" 4" .25" Dia. .75" NPT 5.5" 6.25" Cover Set Screw .75" NPT Grounding Lug .25" Dia. 6.1 Dimensions - Wiring Interface Assembly (PN976-047400-100) 6.5 4.5 0.5 Mounting Holes 1/4" Dia. 6.5 11 14 17 Detcon Model DA-1 PG.
7.0 Wiring Diagram DA-1 All unused inputs should have a single wire connected from one of the digital source terminals to the + input of that channel, with no signal developing resistor. Always remove power before plugging or unplugging the device. Damage can occur to the unit if it is powered during servicing or replacement.
7.1 Wiring Diagram - Wiring Interface Assembly (PN976-047400-100) A B A B 1 2 3 4 Digital Source RS-485 RS-485 When the DA-1 is integrated with its Wiring Interface Assembly it may be configured to power and interface with Detcon 3-wire sensors, 2-wire loop powered sensors, or contact closure devices. Reference the following 3 drawings for wiring instructions. The wiring interface assembly can also be used for mixing inputs.
B A B 1 2 3 4 Digital Source RS-485 RS-485 A Fault NO/NC COM Interface Wiring for 2-Wire Sensors Power Out Power In CH1 CH2 CH3 CH4 Install “+” Jumpers J2+ J3+ J1+ 9 10 11 12 9 10 11 12 5 6 7 8 5 6 7 8 mA 1 2 3 4 mA mA 1 2 3 4 mA mA mA mA mA J3– J1– 2-Wire Sensor Typical mA Detcon Model DA-1 PG.
B A B 1 2 3 4 Digital Source RS-485 RS-485 A Fault NO/NC COM Interface Wiring for Contact Closure Devices Power Out Power In CH1 CH2 CH3 CH4 No Jumpers J2+ J3+ J1+ 9 10 11 12 9 10 11 12 5 6 7 8 5 6 7 8 mA 1 2 3 4 mA mA mA 1 2 3 4 mA mA mA mA J3– J1– J2– Contact Closure Devices Typical 7.0 Warranty Detcon Inc.
