Baldor E100 manual Incremental encoder feedback, Pin Incremental encoder function

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4.1.1 Incremental encoder feedback

The incremental encoder connections (ABZ channels and Hall signals) are made using the 15-pin D-type female connector X8. The encoder inputs (CHA, CHB and CHZ) accept differential signals only. Twisted pairs must be used for each complementary signal pair e.g. CHA+ and CHA-. The Hall inputs may be used as differential inputs (recommended for improved noise immunity) or single ended inputs. When used as single ended inputs, leave the Hall U-, Hall V- and Hall W- pins unconnected. The overall cable shield (screen) must be connected 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 e100 to increase the encoder supply voltage on pin 12 to maintain a 5V supply at the encoder (200mA max).

1 9

8 15

Pin Incremental encoder function

1CHA+

2 CHB+

3 CHZ+

4 Sense

5 Hall U-

6 Hall U+

7 Hall V-

8 Hall V+

9 CHA-

10CHB-

11CHZ-

12+5V out

13DGND

14Hall W-

15Hall W+

	MicroFlex e100
			to encoder signal loss detection
CHA+	1
	1nF		MAX3096	to CPU
		120R	Differential
			line receiver
CHA-	9
	1nF
		DGND

Figure 12 - Encoder channel input circuit - Channel A shown

4-2 Feedback MN1942