Installation and Operation Instructions A/CO2-R2 Series AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 1 of 7 www.workaci.com (888) 967-5224 Please Read Instruction Carefully Before Installation! Figure 1: A/CO2-R2 PRECAUTIONS REMOVE POWER BEFORE WIRING. NEVER CONNECT OR DISCONNECT WIRING WITH THE POWER APPLIED. DO NOT ALLOW LIVE WIRES TO TOUCH THE CIRCUIT BOARD. AN ISOLATION TRANSFORMER IS RECOMMENDED WHEN POWERING THE DEVICE WITH 24VAC. DO NOT RUN THE WIRING IN ANY CONDUIT WITH LINE VOLTAGE. FAILURE TO WIRE DEVICES WITH THE CORRECT POLARITY WHEN USING A SHARED TRANSFORMER MAY RESULT IN DAMAGE TO ANY DEVICE POWERED BY THE SHARED TRANSFORMER. AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 2 of 7 www.workaci.com (888) 967-5224 1. Wall Plate w/PCB 2. (2) 6-32 X 1” Mounting Screws 3. Cover 4. Cover Screws (included in wall plate) Figure 2: Parts of the A/CO2-R2 for Wall Mounting Mounting and Wiring Instruction The PCB must be handed carefully and protected from electrostatic discharge. The power supply has to be connected to VIN and COM. COM is considered as system ground. 1) Mount the wall plate: Run the wires from the back of the wall plate and through the square wire hole in the PCB. Mount the wall plate to the wall, being careful not to trap wires between the wall and the plate. AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 3 of 7 www.workaci.com (888) 967-5224 2) Configure DIP switches: The default setting is 0-10 VDC output (switch 1 on) and ABC on (switch 2 on). For 0-5 VDC output set switch 1 to off. To turn off ABC set switch 2 to off. The 4-20 mA output can be used with switch 1 in the on or off position. Figure 3: DIP Switch Settings 3) Connect wiring to terminal blocks: Connect wiring for voltage in, signal common, and voltage or current output. Connect wires for temperature, override switch and/or setpoint, if these configurations are used. Figure 4: Wiring Connections Dip Switch AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 4 of 7 www.workaci.com (888) 967-5224 The power supply has to be connected to VIN and COM. COM is considered as system ground. The same ground reference has to be used for the A/CO2-R2 unit and for the DDC/signal receiver. Connections of the main terminal of A/CO2-R2 Shielded cable with 16 to 22AWG conductors is recommended. The cover must be removed to wire the unit’s terminal blocks. When using ½” conduit, the strain relief fitting must be removed from the enclosure. Make sure that any conduit or metal fittings do not come in contact with the circuit board. PLEASE NOTE! The same ground reference has to be used for the A/CO2-R2 unit and for the control system! Terminal Function Electrical data Remarks Standard settings VIN COM Power (+) Power ground (-)24 VAC/DC (+) (+/-20%), 2W 24 VAC/DC (-) System voltage reference VOUT 4-20mA Analogue output 1 (+) Analogue output 2 (+) 0-5 VDC or 0-10 VDC 4 to 20mA 0-2000 ppm CO2 0-2000 ppm CO2 AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 5 of 7 www.workaci.com (888) 967-5224 4) Attach and secure cover: There are two tabs on the top of the cover that fit into slots on the top of the wall plate. Begin with the cover above the wall plate with the bottom of the cover angled out from the wall plate. Move the cover down to seat the tabs and then push the bottom of the cover in to the wall plate. Rotate holding screws out from the wall plate to secure the cover in place. The holding screws turn counter-clockwise to secure cover to wall plate, and clockwise to remove cover from wall plate. Figure 5: Cover Attachment Maintenance / Calibration The A/CO2-R2 is basically maintenance free in normal environments thanks to the built-in self-correcting ABC algorithm. The ABC logic may need to be turned off in some applications, such as those with continuous occupancy. Discuss your application with ACI in order to get advice for a proper calibration strategy. PLEASE NOTE! The sensor accuracy is defined at continuous operation (at least 3 weeks after installation) AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 6 of 7 www.workaci.com (888) 967-5224 Dimensions Figure 6: The dimensions of the sensor in inches and [mm] Product Specifications Supply Voltage 24 VAC ±20%, 50/60Hz (half-wave rectifier input) Absolute max. ratings 16.5 to 40 VDC Power Consumption < 0.9 W AveragePeak Power Consumption 3VA for 24 VAC, 3W for 24 VDCCO2 Output Signal Out 1:0-5 or 0-10VDC for 0-2,000 ppm,Set by Dip Switch #1. Default: 0-10VDC Rout < 100 Ohms (DC) Rload >5K Ohms Out 2: 4-20mA for 0-2,000 ppm Rload < 500 Ohms CO2 Accuracy ± 40ppm ± 3% of readingPressure Dependence +1.6% reading per kPaResponse Time ≤ 2 minutes, diffusionWarm Up Time < 1 minute (@ full specs < 15 minutes)Storage Temperature Range -4 to 158°F (-20 to 70°C)Operating Temperature Range 59 to 95°F (15 to 35°C)Humidity 0 to 95% RH, non-condensingSensing Coverage Area 7,500 sq. ft. maximumLife Expectancy > 15 YearsSensing Technology Single Beam Infrared Technology (NDIR) withAutomatic Background Calibration (ABC) Set by Dip Switch #2. Default: On Enclosure UL94-V0 & 5VB rated, flame retardant ABS/PCApprovals REACHRoHS WEEE Table 1: Product Specifications AUTOMATION COMPONENTS, INC Version : 2.0 2305 Pleasant View Road I0000743 Middleton, Wisconsin 53562 Page 7 of 7 www.workaci.com (888) 967-5224 WARRANTY SPECIFICATION The A/CO2-R2 Series are covered by ACI’s Five (5) Year Limited Warranty, which is located in the front of ACI’S SENSORS & TRANSMITTERS CATALOG or can be found on ACI’s web site: www.workaci.com. WEEE Directive At the end of their useful life the packaging and product should be disposed of via a suitable recycle centre. Do not dispose of with household waste. Do not burn. Next >