www.baldormotion.com4-2 Feedback MN19194.1.1 Encoder feedback - X8The encoder connections (ABZ channels and Hall signals) are made using the 15-pin D-typefemale connector X8. Twisted pair cables must be used for the complementary signal pairse.g. CHA+ and CHA-. The Hall inputs may be used as differential inputs (recommended forimproved noise immunity) or single ended inputs. When used as single ended inputs, leave theHall U-, Hall V- and Hall W- pins unconnected. The overall cable shield (screen) must beconnected to the metallic shell of the D-type connector. Connector X8 includes a ‘Sense’ pin,which is used to detect the voltage drop on long cable runs. This allows the MicroFlex toincrease the encoder supply voltage on pin 12 to maintain a 5V supply at the encoder.Location Connector X815-pin D-type female connector (not high density)Pin Encoder function1 CHA+2 CHB+3 CHZ+4 Sense5 Hall U-6 Hall U+7 Hall V-8 Hall V+9 CHA-10 CHB-11 CHZ-12 +5V out13 DGND14 Hall W-15 Hall W+Description Incremental (UVW) encoder input, non-isolated. Pin 12provides 5-11V for encoders requiring power (200mA max)CHA-CHA+MicroFlexAM26LS32Differentialline receiverto CPU120R+5V47pF47pFDGND19Figure 10 - Encoder channel input circuit - Channel A shown18915
