Honeywell Controller Module 51305890-175 MC-TAMT04

Honeywell Controller Module 51305890-175 MC-TAMT04 Description:

Unik You
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The Honeywell EC7830A or EC7850A Relay Module is a microprocessor based integrated burner control for automatically fired gas, oil, or combination fuel single burner full modulation (EC7850A) or on/off (EC7830A) power burner applications. The EC7830A or EC7850A consists of a Relay Module. Subbase, Amplifier, and Purge Card are required to complete the system. The Keyboard Display, which is optional, can be mounted on the Relay Module or on the face of a panel door. The Keyboard Display can also be mounted remotely from the panel, provided this is approved for the application.

The EC7830A must have an earth ground providing a connection between the subbase and the control panel or the equipment. The earth ground wire must be capable of conducting the current to blow the 20A fuse in event of an internal short circuit. It is recommended that the EC7830A have a low impedance ground connection to the equipment frame which, in turn, needs a low impedance connection to earth ground. For a ground path to be low impedance at RF frequencies, the connection must be made by minimum length conductors having maximum surface areas. Wide straps or brackets are preferred rather than leadwires. Be careful to ensure that mechanically tightened joints along the ground path, such as pipe or conduit threads or surfaces held together with fasteners, are free of nonconductive coatings and are protected against mating surface corrosion.