Field Wiring Connections; System Wiring Guidelines - Allen-Bradley Compact 1769-IR6 User Manual

3-8 Installation and Wiring
Field Wiring
Connections
Publication 1769-UM005A-EN-P
4. On the right-side adjacent module, move its bus lever to the right
(unlock) to disconnect it from the module to be removed.
5. Gently slide the disconnected module forward. If you feel excessive
resistance, check that the module has been disconnected from the
bus, and that both mounting screws have been removed (or DIN
latches opened).
It may be necessary to rock the module slightly from
NOTE
front to back to remove it, or, in a panel-mounted
system, to loosen the screws of adjacent modules.
6. Before installing the replacement module, be sure that the bus lever
on the module to be installed and on the right-side adjacent module
are in the unlocked (fully right) position.
7. Slide the replacement module into the open slot.
8. Connect the modules together by locking (fully left) the bus levers on
the replacement module and the right-side adjacent module.
9. Replace the mounting screws (or snap the module onto the DIN rail).

System Wiring Guidelines

Consider the following when wiring your system:
General
• This product is intended to be mounted to a well-grounded mounting
surface such as a metal panel. Additional grounding connections from
the module's mounting tabs or DIN rail (if used) are not required
unless the mounting surface cannot be grounded.
• Channels are isolated from one another by ±10V dc maximum.
• Route field wiring away from any other wiring and as far as possible
from sources of electrical noise, such as motors, transformers,
contactors, and ac devices. As a general rule, allow at least 15.2 cm (6
in.) of separation for every 120V of power.
• Routing field wiring in a grounded conduit can reduce electrical noise.
• If field wiring must cross ac or power cables, ensure that they cross at
right angles.
• To ensure optimum accuracy, limit overall cable impedance by
keeping your cable as short as possible. Locate the I/O system as
close to your sensors or actuators as your application will permit.
• Tighten terminal screws with care. Excessive tightening can strip a
screw.