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4.1.2 SSI feedback

The SSI (Synchronous Serial Interface) encoder interface is specifically designed for use with Baldor SSI motors, which incorporate a custom Baumer SSI encoder. Correct operation with other SSI interfaces cannot be guaranteed. The SSI encoder connections are made using the 15-pin D-type female connector X8. Twisted pair cables must be used for the complementary signal pairs e.g. Data+ and Data-. 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 SSI function

1Data+

2 Clock+

3 (NC)

4 Sense

5 (NC)

6 (NC)

7 (NC)

8 (NC)

9 Data-

10Clock-

11(NC)

12+5V out

13DGND

14(NC)

15(NC)

Motor

 

X8

 

 

 

 

Twisted pairs

 

 

Absolute

 

1

Data+

 

 

9

Data-

 

Encoder

 

 

SSI Interface

2

Clock+

 

 

 

 

10

Clock-

 

 

 

 

 

 

12

+5V out

 

 

 

13

DGND

Connect internal

 

 

4

Sense

 

 

 

 

shields to pin 13.

 

 

Connect overall shield

Chassis

 

 

 

 

 

 

 

to connector backshells.

 

 

Figure 18 - SSI encoder cable connections

4-6 Feedback

MN1942

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Image 44
Baldor E100 manual SSI feedback, Pin SSI function