Rockwell Automation 1771-QC , D17716.5.25 SER/B SERVO POS - Manual (Page 75)

Installing the Assembly
Chapter 6
6Ć25
Figure 6.13a shows a current sourcing configuration. Normally the drive
disable circuit is on, sourcing current into the drive thru terminal 10.
When the drive disable circuit turns off, the drive is disabled.
Figure 6.13b shows a current sinking configuration. Normally the drive
disable circuit is on, sinking current from the drive thru terminal 9. When
the drive disable circuit turns off, the drive is disabled.
Figure 6.14 shows how to connect the drive disable circuit to the Bulletin
1388 servo drive which has an internal power supply and requires a
current source to enable it.
Figure 6.14
Connection Details for Providing a Drive-disable Signal to the Bulletin 1388 Servo Drive
Q1
8.2k
+
-
13
12
10
8
9
12024
Right Wiring Arm of
1771ĆES Expander
Bulletin 1388
Servo Drive
Note that whatever configuration your drive requires, you must connect
the plus side of the power supply to terminal 8 on the right wiring arm of
the 1771-ES expander. Without this connection, the drive disable circuit
will not turn on; the 1771-ES expander will not enable the servo drive.