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Introduction CM-2201/CM-2202 1.0 Introduction The Nelson Heat Trace CM-2201 is designed to monitor and control one heating circuit in ordinary and Class I, Division 2, Class I, Zone 2, and Zone 2 hazardous locations. The CM-2202 can monitor/control two heating circuits in those same locations.
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GFI, etc.) are open for monitoring. The power supply for the CM-2201 is derived from the If the password is “Enabled”, going directly to the power provided for the load. However, the power supply for parameter to be changed, and pressing the ‘up’...
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CM-2201/CM-2202 5.1 Display 5.1.2 Navigation for CM2202 The CM-2201/CM-2202 utilizes a 2-line x 16-character alphanumeric display viewable from the front keypad. The top The CM2202 can monitor/control two separate heating line is reserved for the function or operation and the circuits (channels).
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CM-2201/CM-2202 6.0 Control Modes Forced Control Feature The CM-2201/CM-2202 allows the user to select different This control method simply allows the user to force the cable on or control modes based on their individual process control off as desired using an external signal (e.g. +5 VDC or 24 VAC) parameters.
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CM-2201/CM-2202 Communications 8.0 Communications The Nelson Heat Trace CM-2201 supports a subset of the Modbus RTU protocol format that provides monitoring, ® programming, and control functions using Read (03) and Write (05-06) register commands. General Information Serial Port: Select the serial port that corresponds to your RS-485 adapter.
9.4 Common Warnings/Alarms - What to Look for 9.4.5 Power Limiting (Current Limiting) The CM-2201/CM-2202 has a wide range of warning This alarm indicates that the solid-state relay is limiting the and alarming features that may be selectively enabled or...
Maintenance CM-2201/CM-2202 10.0 Maintenance The CM-2201/CM-2202 should be regularly maintained as follows: a) Check fit of door gasket and adjust as required. Clean door gasket. b) Verify that moisture is not entering enclosure; repair as required. c) Check terminals to ensure connections are secure.
1. Solid State Contact 2. Install Jumper at JP1 (120 OHM Resistor) on both terminals if CM-2201 is last device on network. Else install jumper on one terminal only of JP1. 3. If “Force “ feature is activated by external “dry contact”, use “+5V” and “IN” terminals; Ground connection is not required. If activated by external voltage signal, use “IN”...
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