Mounting and Wiring

Site Preparation

Mounting and Wiring

Site Preparation

The UMC800 must be mounted within an enclosure. Hardware is provided to surface mount the controller to a panel or other suitable surface. Be sure that there is sufficient clearance for mounting the controller enclosure and the external wiring.

UMC enclosure and components

The controller enclosure houses all circuit assemblies of the UMC controller. See Figure 7. The power supply and CPU are modules that plug into slots on the right hand side of the enclosure. Both modules have metal covers on the front where indicators, switches and connectors are located. All external connections to the power supply and CPU are made on the front panels of these modules.

A front cover can be removed by two screws to access the I/O modules. There are two rows of card guides to accommodate up to 16 plug-in I/O modules. External signal wiring to field devices are made with removable terminal blocks that attach to the front of each I/O module. Optional terminal strips can be used to provide shield termination of field wiring.

Power supply, CPU and I/O modules are connected through a common backplane within the enclosure. All external wiring for power supply and I/O modules are brought out through rubber grommets located at the top and bottom of the enclosure. The CPU features two connections for external communications. One provides a cable connection to a PC for configuration and database file management; the other connection accommodates a cable to the operator interface. An optional communication board provides two RS 485 serial communications ports (slave and master) using Modbus RTU protocol.

External Wiring

Access Holes

Front

Cover

CPU Module

Power Supply

Figure 7 UMC800 controller enclosure

Release F

UMC800 Controller Installation and User Guide

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Honeywell UMC800 manual Mounting and Wiring, Site Preparation, UMC enclosure and components