nVent RAYCHEM NGC-40-HTC & NGC-40-HTC3 Installation Instructions
Control and monitoring modules for use with nVent RAYCHEM NGC-40 system
Approvals and Certifications
Hazardous Locations:
- Class I, Div. 2, Groups A,B,C,D T4
- Class I, Zone 2, AEx nC IIC T4 IP20
- Ex nL nC IIC T4 X
- -40°C ≤ Ta ≤ +65°C
Conforms to:
- FM Class Number 3600 (11/98)
- FM Class Number 3611 (10/99)
- ANSI/UL STD. 60079-15-2009
- UL STD. 61010-1
Certified to:
- CAN/CSA STD. C22.2 No. 213-M1987 (R2004)
- CAN/CSA STD. C22.2 No. 61010-1:2004
- EN 61010-1 (2001)
- CAN/CSA STD. E60079-15:02 (R2006)
IEC Ex Markings:
- IEC Ex ETL17.0062X
- Ex ec nC IIC T4 Gc
ATEX Markings:
- ITS17ATEX402833X
- II 3 G Ex ec nC IIC T4 Gc
Description
The nVent RAYCHEM NGC-40-HTC (for single-phase heaters) and NGC-40-HTC3 (for three-phase heaters) modules are used to control either an external solid-state relay or a contactor within the NGC-40 control and monitoring system. These modules also have one alarm output and one digital input. The alarm output can be used to activate an external annunciator. The digital input is programmable and may be used for various functions such as forcing outputs on and off. Other features include ground-fault and line current sensing for both HTC and HTC3. The front panel of the HTC modules has LED indicators for various status conditions. The front panel also provides a ground-fault and heater test button.
Tools Required
- Small flat-blade screwdriver
Additional Materials
- Power supply 24 Vdc @100 mA per NGC-40-HTC/HTC3
- Custom built CAN cables with RJ-45 connections
- CAN Termination Resistor
Kit Contents
| Item | Qty | Description |
|---|---|---|
| A | 1 | NGC-40-HTC module (single-phase heaters) |
| B | 1 | NGC-40-HTC3 module (three-phase heaters) |
Special Conditions of Use
- The overall equipment is evaluated to type of protection "ec". Sealed devices in the form of relays are additionally present in module NGC-40-HTC and NGC-40-HTC3 and comply with requirements for the type of protection nC.
- For full connection details see these installation instructions.
- The equipment shall only be used in an area of not more than pollution degree 2, as defined in IEC/EN 60664-1.
- The equipment shall be installed in an enclosure that provides a minimum ingress protection of IP54 in accordance with IEC/EN 60079-0.
- Transient protection shall be provided that is set at a level not exceeding 140% of the peak rated voltage value at the supply terminals to the equipment.
Warning
This component is an electrical device that must be installed correctly to ensure proper operation and to prevent shock or fire. For technical support, call nVent at (800) 545-6258.
General Specifications
| Parameter | Value |
|---|---|
| Supply voltage | 24 Vdc ± 10% |
| Internal power consumption | < 2.4 W per NGC-40-HTC/HTC3 module |
| Ambient operating temperature | -40°C to 65°C (-40°F to 149°F) |
| Ambient storage temperature | -55°C to 75°C (−67°F to 167°F) |
| Environment | PD2, CAT III |
| Max. altitude | 2,000 m (6,562 ft) |
| Humidity | 5 – 90% noncondensing |
| Mounting | Din Rail – 35 mm |
Electromagnetic Compatibility
| Category | Standard |
|---|---|
| Emissions | EN 61000-6-3 Emission standard for residential, commercial and light industrial environments |
| Immunity | EN 61000-6-2 Immunity standard for industrial environments |
Temperature Sensors
| Parameter | Specification |
|---|---|
| Type | 100 Ω platinum RTD, 3-wire, α = 0.00385 ohms/ohm/°C. Can be extended with a 3-conductor shielded cable of 20 Ω maximum per conductor. |
| Type | 100 Ω, Ni-Fe, 2-wire. Can be extended with a 2-wire shielded cable of 20 Ω maximum per conductor. |
| Quantity | One per NGC-40-HTC/HTC3 module |
Alarm Relay
Dry contact relay (voltage free): Relay contact rated 250 V / 3 A 50/60 Hz (CE) and 277 V / 3 A 50/60 Hz (cSAus). Alarm relay is programmable. NO and NC contacts available.
Contactor Output Relay
Relay contact rated 250 V / 3 A 50/60 Hz (CE) and 277 V / 3 A 50/60 Hz (c-CSA-us).
Digital Input
Multi-purpose input for connection to external dry (voltage-free) contact or DC voltage. May be user programmable for: not used / force off / force on functions. It can be configured to be active open or active closed.
CAN Networking Port
| Parameter | Specification |
|---|---|
| Type | 2-wire isolated CAN-based peer to peer network. Isolated to 24 Vdc – verified by 500 Vrms dielectric withstand test |
| Connection | Two 8-pin RJ-45 connectors (both may be used for Input or Output connections) |
| Protocol | Proprietary NGC-40 |
| Topology | Daisy chain |
| Cable length | 10 m (33 ft) maximum |
| Quantity | Up to 80 HTC/HTC3 and IO modules per network segment |
| Address | Unique, factory assigned |
Connection Terminals
Wiring terminals: Cage clamp, 0.5 to 2.5 mm² (24 to 12 AWG)
Housing
Size: 45.1 mm (1.78 in) wide x 87 mm (3.43 in) high x 106.4 mm (4.2 in) deep
Line Current Sensors
| Parameter | Value |
|---|---|
| Max current | 63 A |
| Accuracy | ± 2% of reading |
Ground-Fault Sensor
| Parameter | Value |
|---|---|
| Range | 10 – 250 mA |
| Accuracy | ± 2% of range |
Outputs
SSR output: 12 Vdc @ 45 mA max per output
System Components
Module Overview
The NGC-40-HTC and NGC-40-HTC3 modules are compact electronic units designed for DIN rail mounting. They feature a front panel with various status LEDs and control buttons.
Front Panel Layout
The front panel includes the following status indicators and controls:
- STATUS LED: Indicates the overall status of the HTC/HTC3 module.
- Off: No power.
- Green: Normal operation, no internal faults.
- Yellow: Module is in Factory mode.
- Red: Indicates HTC/HTC3 operating status.
- Flash R: Indicates an internal fault.
- Flash R/G: Indicates factory status.
- Flash R/Y: Indicates an internal fault has been detected.
- NETWORK LED: Indicates CAN network activity.
- Off: No network activity.
- Green: Flicker indicates receipt of network data.
- Yellow: Flicker indicates transmission of network data.
- Flash R: Indicates network communication failure.
- INPUT LED: Shows the status of the digital input.
- Off: Input is inactive (open).
- Green: Input is active (shorted).
- Flash R: Indicates external input source failure.
- OUTPUT LED: Shows the status of the contactor or SSR.
- Off: Output is off.
- Green: Follows the output state.
- HEATER LED: Indicates the heater's alarm status.
- Off: No alarm.
- Red: High or low current or resistance alarm.
- Flash R: Overcurrent trip alarm.
- TS LED: Indicates the temperature alarm status.
- Off: No alarm.
- Red: High or low temperature alarm.
- Flash R: Temperature sensor failure.
- GFI LED: Indicates ground-fault status.
- Off: No alarm.
- Red: High or low ground-fault alarm.
- Flash R: Ground-fault trip alarm.
- SWITCH LED: Indicates contactor/SSR switch status.
- Off: No alarm.
- Red: Contactor cycle count alarm.
- Flash R: Switch failed shorted on.
- Buttons:
- TEST: Initiates a heater test.
- RESET: Resets the module or fault conditions.
Wiring Terminals
The modules feature a terminal block for various connections:
- Terminal 1: Alarm relay N.O. (Normally Open)
- Terminal 2: Alarm relay COM (Common)
- Terminal 3: Alarm relay N.C. (Normally Closed)
- Terminal 4: Not used
- Terminal 5: SSR Out +
- Terminal 6: SSR Out -
- Terminal 7: Digital In +
- Terminal 8: Digital In -
- Terminal 9: Line In
- Terminal 10: Line Out
- Terminal 11: Coil Out
- Terminal 13: TS COM (White wire)
- Terminal 14: TS Sense (Red wire)
- Terminal 15: TS Source (Red wire)
- Terminal 16: Not used
WARNING: Shock Hazard. Disconnect from live voltage prior to accessing terminals.
Mounting
Each NGC-40-HTC/HTC3 mounts on a standard 35 mm DIN rail.
- Mounting: Insert the rear bottom of the module into the DIN rail, then push up and inwards to engage the clip.
- Removal: Push the module upwards to disengage the clip, then rotate the module toward you.
Power Supply and CAN Networking
The power supply and CAN bus connection utilize an RJ-45 connector. The CAN termination device must be installed in the unused port of the last module in the network chain. Connections are identical for both HTC and HTC3 modules.
Diagram Description: A module is shown with an RJ-45 port. One port is labeled for connection to "Cable from another module or power supply". The other port is labeled "CAN termination here if last one in chain".
RTD Input Connections
North American Installation Technique
For all RTD terminations, the RTD field wires must be terminated on a panel-mounted terminal block. Connections are the same for the HTC3.
Diagram Description: An HTC module's terminal block area is shown. Terminals 13-16 are labeled: TS COM (White), TS Sense (Red), TS Source (Red), and Not used. "HTC RTD Wiring" connects from a "Terminal block" to these terminals, and the terminal block connects to an "RTD".
European Installation Technique
For all RTD terminations, the RTD field wires must be terminated on a panel-mounted terminal block. The RTD cable shield from the field terminal block to the HTC module should be terminated at the earth ground bar located near the module. Connections are the same for the HTC3.
Diagram Description: Similar to the North American setup, but explicitly shows an "Earth grounding bar located at the HTC module" where the shield is terminated. The connection is from a "Field terminal block" to the "RTD".
Contactor Output Wiring
HTC3 Relay Output to Contactor - Three-Phase
Terminals 9 and 11 switch voltage to the contactor coils. The internal pilot relay switches the supply voltage (up to 277 V) to the contactor coil. Refer to the NGC-40 CAN bus connection diagrams for detailed wiring.
Note: Exposure to some chemicals may degrade the sealing properties of the relay output. Periodically inspect the relay output for degradation and replace if necessary.
Diagram Description: A three-phase circuit breaker (L3, L1, L2, N) is connected to the HTC3 module. Output terminals (9, 11) from the HTC3 are wired to a "Contactor" coil. A connection for "To heat tracing" is also shown.
HTC Single-Phase Wiring
Diagram Description: A single-phase circuit breaker (L1, N or L2) is connected to the HTC module. Output terminals (9, 11) from the HTC are wired to a "Contactor" coil. A connection for "To heat tracing" is also shown.
WARNING: Shock Hazard. Disconnect from live voltage prior to accessing terminals.
SSR Output Wiring
HTC Output Connections to SSR - Single-Phase
Terminals 5 & 6 switch voltage to the SSR. The internal SSR driver switches the internal supply voltage (12 Vdc) to the SSR.
Diagram Description: A single-phase circuit breaker (L1, N or L2) is connected to the HTC module. Terminals 5 & 6 are wired to an "SSR". The SSR output is connected to "To heat tracing" (L1, N or L2).
HTC3 Output Connections to SSR - Three-Phase
Diagram Description: A three-phase circuit breaker (L3, L1, L2, N) is connected to the HTC3 module. Terminals 5 & 6 are wired to an "SSR". The SSR output is connected to "To heat tracing" (L1, L2, L3).
WARNING: Shock Hazard. Disconnect from live voltage prior to accessing terminals.
Alarm Relay Functionality
WARNING: Shock Hazard. Disconnect from live voltage prior to accessing terminals.
Note: Exposure to some chemicals may degrade the sealing properties of the alarm relay. Periodically inspect the alarm relay for degradation and replace if necessary.
The alarm relay is multi-purpose and energized in a normal state, configured as Fail Safe. It provides a Form C dry contact rated at 277 V max (3 A).
- NO (Normally Open) contact: Opens when de-energized. Closes during normal conditions when energized. Opens upon an alarm condition or power failure.
- NC (Normally Closed) contact: Closes when de-energized. Opens during normal conditions when energized. Closes upon an alarm condition or power failure.
Relay Contact Rating: 250 V / 3A 50/60 Hz (CE); 277 V / 3A 50/60 Hz (c-CSA-us).
Connections are the same for the HTC3.
Diagram Description: An HTC module's alarm relay terminals (1, 2, 3) are shown, labeled NO, C, NC. It indicates "Failsafe Mode: Contacts shown energized with no alarm condition".
Digital Input Connections
North American and European Installation Techniques
Digital Input: Multi-purpose input for connection to external dry (voltage free) contact or DC voltage.
Rating: 100 Ω max loop resistance or 5-24 Vdc @ 1 mA maximum.
Connections are the same for the HTC3.
North American Installations
Diagram Description: An HTC module's digital input terminals (7 & 8) are shown connected to a "Terminal block". The terminal block is then connected to "+ From user input".
European Installations
Diagram Description: Similar to North American, with terminals 7 & 8 connected to a "Terminal block" and then to "+ From user input". An "Earth grounding bar located at the HTC module" is also shown.
Panel Enclosure and Location
1. Provide Suitable Panel Enclosure
The NGC-40-HTC or NGC-40-HTC3 must be mounted in an enclosure to protect its electronic components. For indoor applications, use a minimum NEMA 1 enclosure (NEMA 12 recommended). For outdoor applications, use a NEMA 4 or NEMA 4X enclosure depending on the requirements.
Note: The nVent RAYCHEM NGC-40-HTC or NGC-40-HTC3 is designed for operation in ambient temperatures from -40°C to 65°C (-40°F to 149°F). If the ambient temperature is outside this range, a space heater and/or cooling fan will be required in the panel.
2. Determine Locations for Assembly in Panel
The NGC-40-HTC or NGC-40-HTC3 should be located in the rear of the panel. The assembly is an electronic unit and must not be located where it will be exposed to strong magnetic fields or excessive vibration.
* North American panel installation techniques
Diagram Description: A typical electrical panel layout is shown. The "Panel door" has an "Alarm light". The "Panel" interior shows various components and a row of HTC modules mounted.
NGC-40 CAN Bus Connections
Up to 10 Modules
Diagram Description: Illustrates a CAN bus network configuration for up to 10 modules. It shows a "Termination Block", a "Power/Termination Module", and a "Bridge Module" distributing power (24 Vdc) and CAN signals to multiple HTC/HTC3 or I/O modules connected in a daisy-chain via RJ-45 ports (IN/OUT). Primary and redundant power supplies (100-240 Vac In) are depicted, with a limit of 20 modules per power supply.
Up to 20 Modules
Diagram Description: Expands on the 10-module configuration, showing how to connect up to 20 modules. The structure remains similar, with power distribution and daisy-chaining of modules. It includes a section for modules 11 through 20, also connected to power supplies and the CAN bus.
Up to 40 Modules
Diagram Description: Depicts a larger CAN bus network for up to 40 modules, organized into segments. It shows multiple "Power/Termination Modules" and "Bridge Modules" supporting the daisy-chain connection of HTC/HTC3 or I/O modules across three tiers of 10-20 modules each. Power supplies are shown with capacity for 20 modules per supply.
* Power supply shall have a means for disconnect from the voltage.
Servicing
The NGC-40-HTC/HTC3 contains no user-serviceable parts. Contact your nVent representative for service and an RMA number if required.
Warnings
- WARNING: Explosion Hazard - Substitution of components may impair suitability for Class I, Division 2 hazardous and nonhazardous locations.
- AVERTISSEMENT - Risque D'explosion - La substitution de composants peut rendre ce matériel inacceptable pour les emplacements de Classe I, Division 2.
- WARNING: Explosion Hazard - Do not replace NGC-40-PTM unless power has been switched off or the area is known to be nonhazardous.
- AVERTISSEMENT - Risque D'explosion - Couper le courant ou s'assurer que l'emplacement est désigné non dangereux avant de replacer le NGC-40-PTM.
- WARNING: Explosion Hazard - Do not disconnect equipment unless power has been switched off or the area is known to be nonhazardous.
- AVERTISSEMENT - Risque D'explosion - Avant de déconnecter l'équipement, couper le courant ou s'assurer que l'emplacement est désigné non dangereux.
Contact Information
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 +86.21.2412.1688
Fax +86.21.5426.3167
cn.thermal.info@nVent.com
Latin America
Tel +1.713.868.4800
Fax +1.713.868.2333
thermal.info@nVent.com
Electrical Heat Tracing | Heat Tracing | nVent RAYCHEM
