3.3 Wiring the COM PortAccessory communication connector/applicable wiringThe communication connector used for the COM port (provided as an accessory with the main unit) hasa screw-tightening type of terminal block. The wiring shown below should be used.Applicable wiring (twisted wiring)Size Conductor cross-section surface areaAWG 28 to 16 0.08 to 1.25 mm2Use a special tool to tighten the terminal block of the communication connector.Using a screwdriver made by Panasonic Electric Works Co., Ltd. (Product number: AFP0806). Thetightening torque should be 0.22 to 0.3 N· m or less.When doing RS485 communication using RS422 typePlease use the following cables or equivalent.Appropriate electrical cables (twisted cables)Type Cross-sectionalviewConductor InsulatorCablediam.SampleappropriatecableSizeResist-ance(at 20°C)Material Thick-nessShieldedtwistedpair1.25 mm 2(AWG16)or greaterMax.16.8Ω/kmPolye-thyleneMax.0.5 mmApprox.8.5 mmBelden 9860Hitachi Cable,Ltd. KPEV-S1.25 mm2 x1P0.5 mm 2(AWG20)or greaterMax.33.4Ω/kmPolye-thyleneMax.0.5 mmApprox.7.8 mmBelden 9207Hitachi Cable,Ltd. KPEV-S0.5 mm 2 x1PNote:• Use shielded twisted pair cables.• Use only one type of transmission cable. Do not mix more than 1 type.• When using shielded cable with crossover wiring for the RS485 transmission line, grounded one end.Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
