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Rockwell Automation 1771-WHF_WHFB Fused Field Wiring Arm Installation Instructions User Manual

Fused field wiring arm, Installation instructions, Pre-installation considerations

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Publication 1771-IN072B-EN-P - December 2004

Installation Instructions

Fused Field Wiring Arm

Cat. No. 1771-WHF and -WHFB

To the Installer

This document describes:

• pre-installation considerations
• how to install the field wiring arm
• how to change a fuse on the field wiring arm
• product specifications

Pre-installation
Considerations

The fused field wiring arm provides individual output circuit protection.

It allows simple fuse replacement without removing the field wiring arm from
the I/O chassis.

Two versions are available, both of which are interchangeable with the
1771-WH field wiring arm:

• 1771-WHF - this wiring arm uses a 3 A fuse for each output. The

maximum continuous current should not exceed 2.0 A per fuse.

• 1771-WHFB - this wiring arm uses a 1.5 A fuse for each output. The

maximum continuous current should not exceed 1.1 A per fuse.

IMPORTANT

Fused field wiring arms require more clearance than
the 1771-WH field wiring arms. If you are installing
in a cabinet, make certain that your installation has
sufficient clearance for this wiring arm.