nvent RAYCHEM T2000 User Manual

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• When using an AC 2000+ with a CR 2000 or a CR 2000-CPS card rack, the alarm and warning
relay driver outputs, the Ethernet communication port, and the Local RS-485 communication
port are not available.
2.5.4 CT MODULE REMOVAL AND INSTALLATION
WARNING:
Always ensure that all power to the individual heating circuit is turned off during installation or
removal to avoid the risk of injury to personnel and damage to the CT module.
WARNING:
Hazardous Area Explosion Hazard
Do not install or remove the CT module while the unit is powered.
To remove a CT module, first remove the wires that pass through the CT module from the
contactor, SSR, or the field wiring terminals and carefully pull the wires through the CT module
housing. Next remove all of the wires from the CT module terminal block by inserting a small
bladed screw driver in the terminal block slot and pulling the wire out of the terminal block.
Remove the two mounting screws and remove the CT module.
Install in the reverse order.
2.6 WIRING
Wire the card rack as indicated by the wiring diagrams supplied. See Appendix B for a
complete set of wiring diagrams. All terminals are labeled with terminal numbers and the
corresponding legend is printed on the wiring label beside the terminal block.
Do not to use wire sizes that exceed the marked terminal ratings and avoid terminating two
wires on the same terminal.
Use of the incorrect screwdriver size may damage the terminals.
Use the terminal block behind the right-most slot, to connect the following three termination
resistors:
• 3300ΩresistoracrosstheterminalslabeledSIG+andSIG–
• 120ΩresistoracrosstheterminalslabeledTX/RX+andTX/RX–
• 120ΩresistoracrosstheterminalslabeledRTS/DCD+andRTS/DCD–
• 120ΩresistoracrosstheterminalslabeledREMOTE+andREMOTE–(AC2000+only)
• 120ΩresistoracrosstheterminalslabeledLOCAL+andLOCAL–(AC2000+only)
Use twisted, three-conductor shielded cable for extending RTD leads. Wire size should ensure
that the maximum lead resistance specified for the CM 2000/CM 2000+ is not exceeded.
Communications wiring should be two conductor twisted shielded cable. Shields on both
RTD and communications wiring should be grounded at one end only. Communications cable
shield should only be grounded at the alarm/communications interface card terminal provided.
RTDcableshieldsshouldbegroundedatthecontrolmoduleterminalprovided.
If the card racks are installed in either a metallic or non-metallic enclosure, follow the
enclosure manufacturer’s recommendations for proper grounding. Do not rely on conduit
connections to provide a suitable ground.
A ground terminal is provided on each card rack for connection of a system ground lead.
Proper system grounding is required for safe and correct operation of the RAYCHEM T2000
HTC protection features. Refer to Article 501-4(b) of the National Electrical Code for grounding
in hazardous areas, if appropriate.
2.6.1 ISOLATED POWER SUPPLY CARD RACK (CR 2000 & CR 2000+)
Conductors used to power the individual control modules and the alarm/communication
interface card, CT module signals, sensor inputs, alarm circuits and controller communications
all terminate on the back of the card rack. The standard card rack assembly has an individual
power source for each control module, therefore more than one power source will be present
on the card rack terminal blocks (see Appendix B).
2.6.2 COMMON POWER SUPPLY CARD RACK (CR 2000-CPS & CR 2000-CPS+)
Conductors used to power the individual control modules and the alarm/communication
interface card, CT module signals, sensor inputs, alarm circuits and controller communications
all terminate on the back of the card rack. The CPS card rack assembly has a common power

nvent RAYCHEM T2000 Specifications

General

Brand	nvent
Model	RAYCHEM T2000
Category	Controller
Language	English