Installation and Operation Instructions A/TT100, A/TT1K A/TTM100, A/TTM1K AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000100 Middleton, Wisconsin 53562 Page 1 of 3 www.workaci.com (888) 967-5224 READ THESE INSTRUCTIONS BEFORE YOU BEGIN INSTALLATION The A/TT and TTM DO NOT support an AC input. All ACI/TT and TTM temperature transmitters can be powered from either an unregulated or regulated 8.5 to 32VDC power supply. The minimum voltage at the transmitter power terminal is 8.5V after load resistor voltage drop. 249 ohm load resistor (1-5VDC output) = 13.5V minimum supply Voltage 499 ohm load resistor (2-10VDC output) = 18.5V minimum supply Voltage Several transmitters may be powered from the same supply as shown below. +VDC (Red Wire)4 to 20mA Output (White Wire)RTD Wires(100 Ohm RTD Brown Wires)(1K Ohm RTD Black Wires)+VDC (Red Wire)GND (White Wire)RTD Wires(100 Ohm RTD Brown Wires)(1K Ohm RTD Black Wires)Voltage Output (Yellow Wire)(1 to 5, 2 to 10VDC)Voltage Output(1 to 5, 2 to 10VDC)Current Output(4 to 20 mA)-++VDC4 to 20mA OutputCurrent Output(4 to 20 mA)Voltage Output(1 to 5, 2 to 10VDC)+VDCGNDVoltage Output(1 to 5, 2 to 10VDC)+-GNDVOUTRTD-++-RTDSPANZEROSPANZEROSPANZEROSPANZEROStandard UnitsPotted Units AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000100 Middleton, Wisconsin 53562 Page 2 of 3 www.workaci.com (888) 967-5224 Each transmitter could draw 25mA. To determine the number of transmitters use the following formula: N=I/25mA where: N = number of transmitters I = current available from power supply 25mA = maximum current draw of transmitter e.g., If I = 1.5A then: N = 1.5/25mA N = 60 Therefore a 1.5A power supply will safely power up to 60 transmitters. All A/TT and TTM temperature transmitters are reverse polarity protected. Room Temperature Transmitters This unit is suitable for either drywall or junction box mounting. First, remove the cover of the housing and mount the base of the Room unit to the wall, using the (2) 6/32” x 1” screws that are provided. Once the base is mounted to the wall, make all of the proper connections and then place the cover back onto the unit. Now tighten the cover down, using the (2) Allen screws located in the bottom of the housing. The Room transmitter is provided with a two pole terminal block for power and a two pole terminal block for the RTD, which allows for easy wiring of the unit. Duct & Duct Averaging Temperature Transmitters Duct Temperature Sensors - Drill a 3/8” hole in the duct and insert the probe through the hole until the foam pad is tight to the duct. Now insert (2) screws through the mounting holes in the flange and tighten until the unit is held firmly to the duct. Duct Averaging Sensors – Drill a 3/8” hole in the duct and insert the averaging element through the hole until the foam pad is tight to the duct. Now insert (2) screws through the mounting holes in the flange and tighten until the unit is held firmly to the duct. The sensor should then be strung in a criss-cross pattern throughout the duct (see Figure #2) using the mounting clips provided, in a pattern that covers the greatest surface area of the duct, to insure that there is no stratification. When bending the copper tubing, be careful that you use a gradual bend and that you DO NOT kink the copper tubing. Power Supply + - + - + -Temp.Transmitter #1Temp.Transmitter #NTemp.Transmitter #2 -VDC+ Controller Gnd In1 In2 In3 = ConnectionsIn1 = Controller Input #1In2 = Controller Input #2In3 = Controller Input #3 AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000100 Middleton, Wisconsin 53562 Page 3 of 3 www.workaci.com (888) 967-5224 Immersion Temperature Transmitters The ACI Immersion type transmitters are provided with a 2.5”, 4” or 8” 304 series stainless steel thermowell. The thermowell has a 1/2” external or process NPT threads and 1/2” internal or instrument NPT threads. All of the ACI thermowells will accept a probe diameter of 0.250”. Strap-On Temperature Transmitters The ACI Strap-On transmitters are provided in a junction box with an adjustable 2” to 5” pipe clamp. The unit should be mounted on the bottom side of the pipe to ensure good temperature transfer. In hot water applications (over 150oF) it is recommended that the transmitter be remote located so as not to exceed the operating temperature of the transmitter. Extra straps may be ordered for larger diameter pipes. Outside Air Temperature Transmitters The ACI Outside Air transmitters are provided in two parts including a weatherproof enclosure and a 2” X 4” junction box. The sensors will be mounted in the weatherproof enclosure and mounting hardware is provided. The transmitter will be provided in the 1 gang junction box and should be mounted on an inside wall so as not to exceed the operating temperature limits of the transmitter. This sensor should be mounted on either the North side of the building or anywhere out of direct sunlight with the sensor probe pointed downward. Weatherproof Aluminum Bell Boxes and NEMA 4X Polycarbonate enclosures are available upon request. Stainless Plate Temperature Transmitters The ACI Stainless Plate temperature transmitters are mounted on the back of a 2” x 4” stainless plate. The sensor is covered with a 1/8” foam insulation, which allows the sensor to sense the actual room temperature and ignore any heat produced by the transmitter or drafts from within the wall. All mounting screws are provided. Troubleshooting No Reading No power to board - check voltage at power terminal - should be between +8.5 and 32 VDC. Reading too Low RTD wires shorted - check with ohmmeter - should be close to either 100 or 1000 Improper range of transmitter (too low) - check current - should be between 4 and 20mA. Reading too High RTD opened - check with ohmmeter - should be close to either 100 or 1000 Improper range of transmitter (too high) - check current - should be between 4 and 20mA. RF Interference Input power must be clean. Use twisted wires or shielded cable. RF resistant power supply. Use a shielded cable to connect the sensor - connect the shield to ground. Encase the board in a RF shielded enclosure. OhmMeterOHMSDisconnect RTD beforetesting sensor resistanceVOLTSMeasure across the + and – ofthe Power WiresRedLeadBlackLeadVoltMeterBlackLeadRedLead+ -+1 to 5 VDC / +2 to 10 VDCOutputCURRENTDisconnect (-) and placemeter in Series~ 100 Ohm or~ 1000 OhmCurrent MeterPowerSupplyTo ControllerInput or PowerSupply Common+4 to 20 mAOutputBlackLeadRedLeadRTDPower Supply /Controller CommonNext >