Allen-Bradley 1771-ODD Installation Instructions

Ac (120v) isolated output module, 16 outputs

To The Installer

Pre installation

Considerations

AC (120V) Isolated Output Module,

16 Outputs

Cat. No. 1771 ODD

Installation Instructions

This document provides information on:

important pre-installation considerations

installing the module

installing and connecting the wiring

replacing the fuse

using the module indicators for troubleshooting

module specifications

An output from this module can drive an Allen-Bradley Size 5 motor

starter, provided its supply voltage does not drop below 92V ac. The

maximum load current the module can deliver is 2A per channel, not to

exceed 8A total per module.

Your module's outputs can drive the following motor starter combinations:

16 size 3 motor starters (1 per output)

10 size 4 motor starters (1 per output)

7 size 5 motor starters (1 per output)

The switching device in the output circuit is a solid-state triac. There is a

small leakage current in the off state due to both triac and capacitive

characteristics. The maximum leakage current per output is 3mA at 138V

ac. Nominal leakage current is 1.5mA. The on-state voltage drop across

the output terminals will not exceed 1.5V ac at 2A.

Table of Contents

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Page 1 Pre installation An output from this module can drive an Allen-Bradley Size 5 motor starter, provided its supply voltage does not drop below 92V ac. The Considerations maximum load current the module can deliver is 2A per channel, not to exceed 8A total per module.
Page 2 Installation Instructions The 1771-ODD module is designed for a 10mA minimum current on each output circuit. The total continuous current the module supports is 8A (2A maximum per channel). If this rating is exceeded, the module overheats and damage may occur.
Page 3 Figure 1 Connection Diagram for the 1771 ODD Isolated Output Module You can use an output of the 1771-ODD module to drive an input of a 120V ac input module (1771-IA, -IA2, -IAD,-ID) to indicate status of turning on a motor starter, for example (Figure 2).
Page 4 Installation Instructions Figure 2 Driving an Input with an Output Replacing a Fuse Each module output is individually fused. You can easily access the module fuses by removing the front component-side cover. Follow the procedure below. ATTENTION: Remove power from the 1771 I/O chassis backplane and wiring arm before removing or installing an I/O module.
Page 5 Installation Instructions Specifications • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •...