aci BACnet AVERAGING Series Installation & Operation Instructions

aci BACnet AVERAGING Series Installation & Operation Instructions Manual pdf 1 page image

Automation Components, Inc.2305 Pleasant View Road | Middleton, WI 53562Phone: 1-888-967-5224 | Website: workaci.comPage 1FIGURE 1: ENCLOSUREDIMENSIONSBACnet / Modbus AVERAGING SERIESInstallation & Operation InstructionsPhone: 1-888-967-5224Website: workaci.comGENERAL INFORMATIONThe BACnet MS/TP / Modbus RTU Averaging Seriessensor is designed for use with electronic controllersin commercial heating and cooling building manage-ment systems. The ACI BACnet MS/TP / Modbus RTUAveraging Series sensor monitor the averagetemperature in commercial HVAC ductwork andprovides a better average temperature of the airinside the duct compared to a single point ductsensor. Averaging sensors are sold in either Copperor Flexible Averaging variations. The CopperAveraging sensors include a continuous sensingelement, which covers the entire length of the probe.The Flexible Averaging sensor has either 4 or 9sensing points depending on the length. It usesBACnet MS/TP or Modbus for RTU for physicalconnection to a BAS or controller, has dip switches toset addresses and baud rate, parity and stop bits(Modbus RTU only), and has on board end-of-linetermination. There is no analog output.WIRING INSTRUCTIONSThe BACnet MS/TP /Modbus RTU Averaging Seriestemperature sensor has a depluggable terminalblock located on the front of the PCB. For ease ofwiring, we recommend removing the block, wiring,and reattaching before mounting. 16 to 22 AWGtwo conductor shielded cable is recommended forpowering the sensors.ACI recommends using Belden 3105 or compatiblecable for RS-485 communication wiring. This wire has120 ohm input impendence. The terminal blocksallow for (1) or (2) wires to be connected in eachposition for daisy chaining. Daisy chain the RS-485wiring and do not use “Star” or “T” wiring. Avoidrunning communication wires next to AC linevoltage wires. These can be sources of noise that canaffect signal quality.3.60"(91.44 mm)2.25"(57.15 mm)4.79"(121.55 mm)2.35"(59.80 mm)FIGURE 2: LAYOUTDIP SWITCHBAUDADDRESSOFFONPARSW4BACNETMODBUSRESETBUTTONEND OF LINETERMINATIONLEDEN DISD+D-GNV64321684214211ON122 3 4TERMINALBLOCKSVersion: 2.0I0000932