Spectrum Controls 1769sc-HART Modules - Manual (Page 23)

Chapter 3: Installation and Wiring
User’s Manual 0300217-03 Rev. A
3-5
Figure 3-2
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.
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).
A 1769-ECR or 1769-ECL right or left end cap respectively must be
used to terminate the end of the bus.
Section 3.5
Mounting
During panel or DIN rail mounting of all devices, be sure that all
debris (metal chips, wire strands, etc.) is kept from falling into the
module. Debris that falls into the module could cause damage at
power up.
3.5.1 Minimum Spacing
Maintain spacing from enclosure walls, wireways, adjacent equipment, etc. Allow 50 mm
(2 in.) of space on all sides for adequate ventilation, as shown below:
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