nvent RAYCHEM NGC-30-CR RMM3 Remote Temperature Module Instruction Manual
- June 12, 2024
- nVent RAYCHEM
Table of Contents
nvent RAYCHEM NGC-30-CR RMM3 Remote Temperature Module
Modules for use with the nVent RAYCHEM NGC-30
WARNING: This component is an electrical device that must be installed correctly to ensure proper operation and to prevent shock or fire. Read these important warnings and carefully follow all of the installation instructions.
- Component approvals and performance are based on the use of nVent-specified parts only. Do not use substitute parts.
- Keep components dry before and during installation
- Leave these instructions with the end user for reference and future use.
- For technical support, call nVent at +32 16 213511 or +1 800 5456258 or your local representative.
ATEX/IECEx/UKEX ZONE 2 conditions of safe use
- This equipment must be mounted in an ATEX/IECEx/UKEX certified Zone 2 enclosure that provides a minimum ingress protection of IP54 when used in a Zone 2 environment.
- The enclosure shall only be accessible with the use of a tool.
- Device shall only be used in an area of not more than pollution degree 2.
- Provisions shall be made, external to the apparatus, to provide the transient protection device to be set at a level not exceeding 140% of the rated voltage at the input terminals of this apparatus.
General installation instructions
- The NGC-30 components must be installed:
- In compliance with all local electrical and safety codes
- In an enclosure suitable for the application environment. When used in Zone 2 hazardous locations, a minimum IP54 enclosure is required. The enclosure shall only be accessible with the use of a tool.
- The NGC-30 components must be protected by external overcurrent and disconnect devices. This may be a circuit breaker or a combination of disconnect switch and fuses. Also for Overvoltage protection, an external protection needs to be provided to limit any transients to 140% of the rated input voltage. The disconnect device:
- Must disconnect all ungrounded, current-carrying conductors
- Should be located in close proximity to the equipment
- Be within easy reach of the Operator
- Be marked as the disconnecting device for the equipment
- Supply wiring insulation must be rated for the highest voltage and temperature to be encountered in the application. Conductors must be sized for the application and be protected by an external overcurrent device.
- Some wiring configurations will use more than one power source and all must be de-energized prior to performing any maintenance on a controller circuit.
- The protection provided by this equipment may be impaired if the device is used outside of its ratings or for applications other than is intended.
- Always be sure that the intended location is classified as an area for which the product is approved.
- CRM(S) and CTM modules must be handled with care when installed in a panel. Components should not be subject to mechanical stress.
- Wear an anti-static wrist strap connected to the ground in order to avoid component damage when installing the CRM(S) or CTM modules.
FCC STATEMENT
Conducted and radiated emissions – Statement of compliance
This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more
of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
This Class A digital apparatus complies with Canadian ICES-003.
Description
The nVent RAYCHEM NGC-30-CRM/-CRMS and NGC-30-CTM provide ground-fault and line current sensing, alarming, switching and RTD inputs for five heat-tracing circuits when used with the NGC-UIT. The NGC-30-CRM is used to control Electromechanical Relays (EMRs) and the NGC-30-CRMS is used to control Solid State Relays (SSRs).
Tools Required
- Screwdriver small blade – standard
- RJ11 stripping/crimping tool
- Wire cutters
- RJ11 connectors
Additional Materials
- Power supply – 12 Vdc @ 400 mA-per NGC-30-CRM/-CRMS board
- RJ11 4 conductor cable
Kit Contents
| Item | Qty | Description |
|---|---|---|
| A | 1 | NGC-30-CRM or CRMS (card rack module with connectors) |
| B | 1 | NGC-30-CTM (current transformer module) |
| C | 1 | NGC-30-CR (card rack) |
| D | 1 | NGC-30-CVM (voltage monitoring module) – optional |
Cleaning instructions
- If dust accumulates on the NGC-30-CRM/-CRMS circuit board use dried compressed air to remove the dust. Turn off all power to the NGC-30 panel. Carefully disconnect all cables from a single
- NGC-30-CRM/-CRMS card, making sure to label cables so that they can be reconnected after board cleaning. Wear an anti-static wrist strap connected to ground in order to avoid component damage. Remove the CRM/CRMS circuit card from the card cage and place on a clean lint-free surface.
- Use dry compressed air from a can for cleaning circuit boards. (Avoid factory compressed air since it may contain enough moisture or oil to cause permanent damage.) Use short quick blasts to remove dust build-up as necessary. After cleaning, replace the
- CRM/CRMS in the same card cage position and reconnect all cables. Remove only one card at a time for cleaning to avoid any problems during re-installation.
General|
---|---
Supply Voltage| 12 Vdc ± 10%
Internal power
consumption
| < 5 W per NGC-30-CRM/-CRMS
Ambient operating
temperature
| –40°F to 140°F (–40°C to 60°C)
Ambient storage temperature| –40°F to 167°F (–40°C to 75°C)
Environment| PD2, CAT III
Max. altitude| 2000 m
Humidity| 0 – 90% non-condensing
Electromagnetic Compatibility
Immunity| Heavy Industrial
Emission| Industrial Environment
Temperature Sensors
Type| 100-ohm platinum RTD, 3-wire, α = 0.00385
ohms/ohm/°C. Can be extended with a 3-conductor shielded cable of 20 ohm maximum per conductor
Quantity| Up to five wired directly to each NGC-30-CRM/-CRMS
Current Sensors|
Mounting| Din Rail – 35 mm
Quantity per
NGC-30-CTM
| Five for ground-current measurement
Five for line current measurement
Line Current Sensors
Max current| 60 Aac 50/60 Hz
Accuracy| ± 2% of reading
Ground Fault Sensor
Range| 10 – 200 mA
Accuracy| ± 4% of range at 30 A line current
Voltage Sensor|
Range| 80 – 290 Vac 50/60 Hz
Accuracy| ± 1% of the span
Outputs|
CRM output relays| Form A 3-Amp @ 277 Vac max 50/60 Hz (CSA), 1.5 A MAX @ 277
Vac max 50/60 Hz (IECEx/ATEX/UKEX)
CRMS SSR
outputs
| 12 Vdc @ 30 mA max per output
Alarm Relay| Form C 3 A MAX @ 277 Vac max 50/60 Hz (CSA), 1.5 A MAX @ 277 Vac
max 50/60 Hz (IECEx/ATEX/UKEX)
Communication to NGC-UIT
Type| 2 wire RS-485
C able| One shielded twisted pair
Length| 4000 ft. (1200 M) maximum*
Quantity| Up to 52 NGC-30-CRM/-CRMS may be
connected to one NGC-UIT
Connection Terminals
Power supply/ Pilot Relay/ RTD/ Comm Port
(RS485)
| 0.8 – 3.3 mm2 (18-12 AWG) Minimum rating of client-provided wiring, 70°C or higher Tightening torque: min 0.5 Nm, max 0.6 Nm
If required a Repeater can be used.
- Alarm output
- Relay outputs (5x)
- LEDs (9x)
- Fuse
- 12 Vdc Inputs (2x)
- End of Line (EOL) jumper
- RS-485 Communications
- Line & ground-fault sensor inputs (5x)
- RTD Inputs
bk Address Switches
Power Supply
The power supply connector (TB19) is a dual two-pin connector. Either
connector allows for power in (pin #1 (+), pin #2 (–) and bussing of power to
other NGC-30-CRM modules).
Note: The power supply must be sized correctly based on the number of
NGC-30-CRM/-CRMS modules.
RS-485 Communications
The RS-485 connector (TB6) is a dual three-pin connector. Either connector
allows for RS-485 input signals (pin #1 (shield), pin #2 (+), pin #3 (–)) and
bussing of RS485 signal to other NGC-30-CRM modules.
End of Line (EOL) Jumper
If this device (NGC-30-CRM/-CRMS) is the last device in the RS-485 network,
the J1 jumper needs to be moved from terminals 2 & 3 to terminals 1 & 2.
RTD Inputs – Ordinary Area
3 wire RTDs with shield may be connected to RTD Ch1 thru Ch 5 (TB1 – TB5). The
two common wires (usually red, red) are connected to terminals 2 & 3, the
source (usually white) to terminal 1 and the braid to terminal 4 (earth
ground).
Note: RTD’s are not required if monitoring current/ground faults only or if
RTD’s are connected via RMM3.
RTD Inputs – Hazardous Area
For all RTD terminations in a hazardous area, the RTD field wires must be
terminated on a panel-mounted terminal block.
Relay Output Connections to Contactors or Solid State Devices (TB7)
- This connector switches voltage to the contactor coils or solid state relays.
- The pilot relay will switch the supply voltage (up to 277 Vac) to the contactor coil (using an NGC-30-CRM) or 12 Vdc to the solid state device (using an NGC-30-CRMS).
- Refer to system layout diagram for detail wiring.
Common Alarm
- The common alarm terminal block (TB12) provides a form C dry contact, rated at 277 Vac max (3 A).
- When the nVent RAYCHEM NGC-30 system is powered on, the common alarm relay coil is energized and pin 2 is connected to pin 1 (common). This is the “No Alarm” condition for the CRM/CRMS board.
- If the alarm occurs, or the CRM/CRMS board loses power, the relay coil is de-energized and pin 1 (common) is disconnected from pin 2 and connected to pin 3 to indicate an alarm condition exits.
Address Switches (SW1 & SW2)
- Each NGC-30-CRM/-CRMS must have a unique communication address selected. The valid address switch range when using the NGC-UIT is 1-99. SW1 is the ones digit (0–9) and SW2 is the tens digit (0 or 9).
- Note: When adding an NGC-30-CRM/-CRMS to the system, you must perform a network update at the NGC-UIT.
NGC-30-CR installation instructions
- Mounting of Card Rack
- Use the mounting template (on page 7) to mount the rack on a panel backplane. There are four holes (0,48 cm dia.) to secure it to the mounting surface using #8 screws.
- Once the card rack is installed, a earth bonding wire must be connected to the card rack using the ground screw provided.
- Note: The card rack must be installed on a non-combustible surface.
System layout NGC-30-CRM
NGC-30-CTM installation instructions
Ground-Fault/Line Current Sensors
- Connections from NGC-30-CRM/-CRMS to NGC-30-CTM.
- Using an RJ11 connector/cable assembly, connect one end to an RJ11 input (TB13-TB17) and the other end to the appropriate
- NGC‑30-CTM RJ11 connector.
Mounting of NGC-30-CTM
Each NGC-30-CTM mounts on a DIN 35 rail. It should be located between the
circuit breaker or terminal block and contactor or SSR in the panel.
Optional Voltage Sensor
The optional voltage sensor can monitor 80 – 290 Vac. This voltage connects to
one of the five line current/ground-fault inputs on the NGC-30-CRM.
Note: By using the optional voltage sensor, you lose the ability to
monitor the ground-fault and current for that circuit.
Ground-Fault/Line Current Cable Assembly
- In EMEAI the cables are not available as loose item. Cables are project specific and will be custom made.
- In North America a complete cable may be ordered as part number: 205780100-XXX, with XXX = length (L) in inches.
Voltage Sensor Cable Preparation
Notes
- Cut one end off of a ground-fault /line current cable.
- Strip insulation approx. 2,5 cm from cut end.
- Strip the red and black wire insulation approx. 0,5 cm.
- Connect red and black wire to the two position terminal plug. No need to be concerned about polarity.
- Trim brown and orange wires from cut end.
System layout NGC-30-CRMS
Contact address
- nVent
- 899 Broadway
- Redwood City, CA 94063
- United States
- Tel +1.800.545.6258
- Fax +1.800.527.5703
- thermal.info@nVent.com
North America
- Tel +1.800.545.6258
- Fax +1.800.527.5703
- thermal.info@nVent.com
Europe, Middle East, Africa
- Tel +32.16.213.511
- Fax +32.16.213.604
- thermal.info@nVent.com
Asia Pacific
- Tel +86.21.5426.2937
- Fax +86.21.2412.1688
- cn.thermal.info@nVent.com
Latin America
- Tel +1.713.868.4800
- Fax +1.713.868.2333
- thermal.info@nVent.com
©2023 nVent. All nVent marks and logos are owned or licensed by nVent Services GmbH or its affiliates. All other trademarks are the property of their respective owners. nVent reserves the right to change specifications without notice. RAYCHEM-IM-H57723-NGC30-ML-2306
References
Read User Manual Online (PDF format)
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