343.2 EncoderConnections3.2.1 X3A RS422/TTLIncremental EncoderInputConnect the incremental encoder mounted on the motor to the 15-pinSub-D connector at X3A on the COMBIVERT F5M. This connectionprovides speed feedback and is imperative to the proper operation ofthe F5.Input WiringA +B +A -B -approx.120 5 4 3 2 110 9 8 7 615 14 13 12 115.2 V x I+5VIvar = 170 mA - –————V varPin No. Signal3 A-4 B-8 A+9 B+11 Vvar 24...30 V12 +5.2 V13 0V (com)14 N-15 N+Shield HousingONLY when the inverter is switched off and the voltagesupply is disconnected may the feedback connectorsbe removed or connected!The internal voltage of "Vvar " 24...30 V (1)is an unregulated supply and will allow upto 170 mA max. current draw, for X3A andX3B total. If higher voltages / currents arerequired, then an external power supplymust be provided.The +5.2 V is a regulated voltage supplygenerated from V var and will allow up to500 mA max. current draw, for X3A andX3B total. If additional current is requiredfrom the +5.2 V output, the current fromVvar decreases in accordance with followingformula:The following specifi cations apply to encoder interface X3A and X3B, channel1 and 2 respectively:• Max. operating frequency: 300 kHz.• Internal terminating resistance: Rt = 120 • RS422 or TTL level square wavevoltage level: 2...5 Vdcapprox.34 Installation and Connection
