Wiring Between Sensing Unit, Controller, And Indicator; Table 3-2 Permissible Wiring Bundling - Honeywell 7866 Operation And Maintenance Manual

Permissible Wiring Bundling
Bundle No.
1
2
3
3.7

Wiring Between Sensing Unit, Controller, and Indicator

Wiring Connections at the Sensing Unit
Step
After the sensing unit is mounted, carefully remove the top threaded cover by turning it
1
counterclockwise. (Loosen the set screw.)
2 Two openings are provided for cable entrance; make certain the plug screw is tightened firmly into
the unused right-hand opening.
3 Use 1/2 NPT threaded electrical conduit, and mount the special adapter fitting supplied with the
analyzer.
4 Wire as shown in Figure 3-5.
EXPLOSION-PROOF SENSING UNIT REQUIREMENTS
•
Always use conduit for electrical wiring and follow special installation procedures.
•
Make certain fully qualified personnel make this installation and all local regulations are observed.
Failure to comply with these instructions could result in fire caused by explosion inside the housing.
9/06 7866 Triple Range Digital H

Table 3-2 Permissible Wiring Bundling

• Line power wiring
• Earth ground wiring
• Line voltage control relay output wiring
• Line voltage alarm wiring
Analog signal wire, such as:
• Input signal wire (thermocouple, 4 to 20 mA, etc.)
• 4-20 mA output signal wiring
Digital input signals
• Low voltage alarm relay output wiring
• Low voltage wiring to solid state type control circuits
• Low voltage wiring to open collector type control circuits
Action
and CO Analyzer/Indicator - Operation and Maintenance
2 2
Wire Functions
Installation
27