Installation Instructions Owner's manual

ManualsBrandsRockwell Automation ManualsEquipment1771-WHF_WHFB Fused Field Wiring Arm

1 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.

Summary of content (4 pages)

PAGE 1
Installation Instructions Fused Field Wiring Arm Cat. No. 1771-WHF and -WHFB To the Installer This document describes: • • • • Pre-installation Considerations pre-installation considerations how to install the field wiring arm how to change a fuse on the field wiring arm product specifications 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.
PAGE 2
Fused Field Wiring Arm Cat. No. 1771-WHF and -WHFB The following figure shows the minimum dimensions from the back of the 1771 I/O chassis to the front of the fused field wiring arm and to the front of a typical wire bundle. Top of Chassis Fused wiring arm Back of Chassis Fuse holder Wire bundle To end of fuse holders Installing the Fused Field Wiring Arm 209.6mm (8.25”) 195.6mm (7.
PAGE 3
Fused Field Wiring Arm Cat. No. 1771-WHF and -WHFB 3 4. Swing the wiring arm upward onto the module until the arm is secured by the tab. 5. Connect field wiring as outlined in the installation data sheet included with your particular output module. IMPORTANT Make certain that you allow sufficient slack in the wiring at the bottom of the field wiring arm so that the wiring arm can pivot sufficiently on the horizontal bar to allow module removal.
PAGE 4
. Replace the fuse holder in the field wiring arm as shown above. 5. Reapply power to the wiring arm. Specifications WARNING The 1771-WHF and 1771-WHFB are not suitable for use in Class I Division 2 Groups A, B, C, D Environments. Catalog Number 1771-WHF (3 A) and 1771-WHFB (1.5 A) Dimensions 8.265H x 1.224W x 2.0D (inches) 209H x 31W x 51D (millimeters) Conductors Wire Size - 14…20 AWG (2.5mm2…0.5mm2), copper only stranded or solid, rated at 75 oC or higher, 3/64 inch (1.