Spectrum Controls 1769sc-IF8u User Manual

Page 31

Chapter 3: Installation and Wiring

1. Disconnect power.

2. Check that the bus lever of the module to be installed is in the

unlocked (fully right) position.

NOTE: If the module is being installed to the left of an existing
module, check that the right-side adjacent module’s bus lever is in the
unlocked (fully right) position.

3. Use the upper and lower tongue-and-groove slots (1) to secure the

modules together (or to a controller).

4. Move the module back along the tongue-and-groove slots until the

bus connectors (2) line up with each other.

5. Push the bus lever back slightly to clear the positioning tab (3). Use

your fingers or a small screwdriver.

6. To allow communication between the controller and module, move

the bus lever fully to the left (4) until it clicks. Ensure it is locked
firmly in place.

ATTENTION! When attaching I/O modules, it is very important that the bus

connectors are securely locked together to ensure proper electrical connection.

7. Attach an end cap terminator (5) to the last module in the system by

using the tongue-and-groove slots as before.

8. Lock the end cap bus terminator (6).

IMPORTANT: A 1769-ECR or 1769-ECL right or left end cap respectively

must be used to terminate the end of the bus.