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4-10
Wiring 1394 GMC and GMC Turbo Systems
51 mm
(2.0 in.)
22 mm
1
(.875 in.)
Motor
cable
Cable Preparation
Publication 1394-5.0 — May 2000
Encoder Feedback Wiring
These connectors accept encoder feedback signals from an optional
encoder. Terminal 10 requires a user-supplied, regulated +5V DC
(±5%). We recommend Belden #9728 wire or equivalent. When you
use a 5 volt power supply, there is a maximum distance between the
encoder and 1394 of 12.2 meters (40 feet).
The 1394 interface circuitry requires 0.325A to operate. Any
additional devices connected to the 1394, such as incremental
encoders, may require an additional 0.2A per device to operate.
Check your device for operational requirements.
Make the encoder feedback connections according to the table below.
Connectors are located on the bottom of your system module (refer to
Figure 4.7 for 1394x-SJTxx-C and -T systems and Figure 4.8 for
1394C-SJTxx-L systems).
For this axis: Connect to this terminal:
0
1
2
3
To improve the bond between the motor feedback cable shield and the
system module PE ground, a cable shield clamp is included with the
Series C system modules.
Ensure an appropriate amount of the cable insulation and braided
shield is removed from the feedback cable. Place the cable wires and
exposed braided shield into the cable shield clamp and tighten the
clamp screw. Then thread the bracket screw into the bottom of the
system module and tighten. Refer to the figure below for an
illustration.
Figure 4.9
Series C System Module Cable Clamps
Cable wires
1
Bracket
screw
Braided
shield
Clamp
exposed
screw
1
Dimensions given are approximate and will vary
depending on the specific installation. Keep wires
as short as possible while maintaining adequate
stress relief.
J3
J4
J5
J10
Cable
shield
clamp
Feedback
cable clamps
System module
ground bar
Clamp Attachment
1394 front view
Wiring to System Module
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Troubleshooting
