Two Versions

While the Nelson CM-GP controller comes ready to wall-mount, the AXPC100-CM-GP is configured for direct installation on piping systems. As a stand-alone pipe mounted solution, the AXPC100-CM-GP significantly reduces installation labor and material costs. It employs the field-proven Nelson AX Connection Kit for fast, simple pipe mounting.

As simple to operate as they are to install, both controllers feature a single line, alphanumeric LCD display that enables the use of English language prompts for set point entry and operation for one heat tracing circuit. LED lights indicate whether there is power to the unit, if the heater power is on, along with the current status of alarms. Dry contacts close in the event of an alarm activation, including high or low temperature alarms, sensor failures, or ground fault trips and are conveniently wired to a terminal strip for local or remote use.

Ground Fault Protection

Built-in ground fault leakage detection is a key advantage because it does away with the need for a separate EPD branch circuit breaker and costly manual maintenance checks.

Ground faults typically are the result of damaged or improperly installed heat tracing cables, which allow current-carrying conductors, surfaces, or parts to be in contact with grounded objects. This type of fault can eventually become serious, resulting in overheating, dangerous fires, and shock hazards.

As a standard feature, Nelson AXPC100-CM-GP and CM-GP controllers are programmed to trip when leakage current exceeds the specified maximum allowable amount. By installing the controllers, the end user brings their heating circuit up to the current requirements for ground fault equipment protection outlined in the National Electrical Code and Canadian Electrical Code. For more information, visit www.emerson.com/en-us/automation/nelson.