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
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
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