The TC 1818a is an 18-circuit microprocessor-based temperature control and monitoring module developed specifically for heat tracing. The module can be configured for either process sensing control (with an RTD for each circuit) or ambient proportional control (APC).
As a modular unit, the TC 1818a is typically located within an enclosure suitable for the area classification. For maximum versatility, multiple modules can be installed in a common enclosure. Individual six-point sensor modules handle input to and output from the TC 1818a via ribbon cable connectors. Up to three input and output modules can be connected to each TC 1818a module.