nvent Raychem NGC-30 User manual

Installation Manual
NGC-30
Firmware version # - V1.18

2 |nVent.com
CONTENTS
Section 1 – Overview ................................................................................................................................ 3
1.1 Introduction.................................................................................................................................. 3
Section 2 – Installation and Wiring ........................................................................................................... 4
2.1 Introduction.................................................................................................................................. 4
2.2 Initial Inspection .......................................................................................................................... 4
2.3 Operating Environment................................................................................................................ 4
2.4 Installation Location.................................................................................................................... 5
2.5 Mounting Procedures.................................................................................................................. 5
2.6 Wiring Procedures ....................................................................................................................... 5
2.6.1 INCOMING POWER WITH DISTRIBUTION SYSTEM.......................................................... 5
2.6.2 OUTGOING POWER WITH DISTRIBUTION SYSTEM.......................................................... 6
2.6.3 INCOMING/OUTGOING POWER WITHOUT DISTRIBUTION PANEL BOARD.................... 6
2.6.4 INCOMING RTD WIRING ..................................................................................................... 7
2.6.5 CONNECTING THE RS-485 DEVICE NETWORK................................................................. 7
2.7 Connections for Remote Annunciation.................................................................................... 12
2.8 RS-232, RS-485, or Ethernet Remote Port Connections to a Host Computer........................ 14
2.8.1 RS-232 SERIAL CONNECTIONS ....................................................................................... 14
2.8.2 RS-485 SERIAL CONNECTIONS ....................................................................................... 14
2.8.3 ETHERNET CONNECTIONS.............................................................................................. 14
2.9 Testing the nVent RAYCHEM NGC-30 System......................................................................... 15
Section 3 – nVent RAYCHEM NGC-30 Components and Operation ........................................................ 16
3.1 User Interface Terminal (NGC-UIT)........................................................................................... 16
3.1.1 MULTIPLE NGC-UIT MODELS ........................................................................................... 16
3.1.2 NGC-UIT LOCAL AND REMOTE NETWORK CONNECTIONS........................................... 16
3.1.3 NGC-UIT LED STATUS ....................................................................................................... 18
3.1.4 CONFIGURATION SWITCHES ........................................................................................... 18
3.1.5 NGC-UIT RESET SWITCH .................................................................................................. 18
3.2 Card Rack Module (NGC-30-CRM/-CRMS) and Current Transformer
Module (NGC-30-CTM) ............................................................................................................. 19
3.3 Card Rack (NGC-30-CR).............................................................................................................20
3.4 Voltage Monitoring Module (NGC-30-CVM) – Optional.......................................................... 20
3.5 Remote Monitoring Module (RMM2) – Optional..................................................................... 21
3.6 Power Line Carrier Interface Module (PLI) – Optional............................................................ 22
Section 4 – Appendices .......................................................................................................................... 23
Appendix A – Replacement Component Ordering Guide.............................................................. 23
Appendix B – Panel Specications................................................................................................. 24
Appendix C – NGC-30-CRM/-CRMS Specications....................................................................... 27
Appendix D – NGC-UIT2 Specications ......................................................................................... 28
Appendix E – Device Address......................................................................................................... 30

nVent.com |3
SECTION 1 – OVERVIEW
1.1 INTRODUCTION
The nVent RAYCHEM NGC-30 is a fully wired and tested control and monitoring system used
with electric heat tracing. This manual provides information pertaining to the installation,
operations, testing, adjustment, and maintenance of all components of the RAYCHEM NGC-30.
For information about how to program the RAYCHEM NGC-30, see the RAYCHEM NGC-30
Programming Guide (H58186)
A typical RAYCHEM NGC-30 is made up of at least a nVent RAYCHEM User Interface Terminal
(NGC-UIT), one Card Rack (NGC-30-CR), one Card Rack Module with connectors
(NGC-30-CRM or NGC-30-CRMS), and one Current Transformer Module (NGC-30-CTM).
Optional nVent RAYCHEM Remote Monitoring Module (RMM2), Power Line Carrier Interface
(PLI) and Voltage Monitoring Module (NGC-30-CVM) may be used.
The information in this document coincides with the specific releases of firmware
(listed in Table 1.1.) for the User Interface Terminal (NGC-UIT) and Card Rack Module
(NGC-30-CRM/-CRMS) components. As nVent releases new firmware to significantly modify
or enhance any of these components, new documentation will accompany these releases.
To ensure that the correct documentation is being used for your particular version of the
RAYCHEM User Interface Terminal (NGC-UIT), compare the firmware version number of each
component against the number listed in the table below. As subsequent changes are made,
supplements to this document will be included in manuals shipped after the firmware is
released. Supplements will make specific reference to the operation or functional change.
Copies of this manual and updates may be downloaded from the Literature section of
nVent.com
Table 1.1 Component versions
Component Version number
NGC-CRM/CRMS V1.0X
NGC-UIT V1.1X
RMM2 V1.0X

4 |nVent.com
SECTION 2 – INSTALLATION AND WIRING
2.1 INTRODUCTION
WARNING:
Electrical Hazard! Ensure all personnel involved in installation, servicing, and programming are
qualified and familiar with electrical equipment, their ratings, and proper practices and codes.
Multiple voltages and signal levels may be present during the installation, operation, and
servicing of this product. Do not power the product until the safety provisions outlined in this
section have been observed.
This section includes information regarding the initial inspection, preparation for use, and
wiring instructions for the components of the RAYCHEM NGC-30.
2.2 INITIAL INSPECTION
Inspect the shipping container for damage. If the shipping container or cushioning material
is damaged, it should be kept until the contents of the shipment have been verified for
completeness and the equipment has been checked mechanically and electrically. Procedures
for installing the RAYCHEM NGC-30 are given in this section. If the shipment is incomplete,
mechanically damaged, defective in any way, or does not pass the electrical performance tests,
notify the nearest nVent representative. If the shipping container is damaged, or the cushioning
material shows signs of stress, notify the carrier as well as your nVent representative. Keep the
shipping materials for the carrier’s inspection.
2.3 OPERATING ENVIRONMENT
There are three types of User Interface Terminals (UITs) available with the RAYCHEM NGC-30
panel, as shown in Table 2.1. The term “NGC-UIT” in this document refers to any of the
available NGC-UITs, regardless of which model is actually installed.
Table 2.1 NGC-30 User Interface Terminals (UITs)
UIT type Area classification Usage
NGC-UIT-ORD Nonhazardous (Unclassified) Locations NEMA 12
• (Indoors)
NGC-UIT-ORD-12 Nonhazardous (Unclassified) Locations NEMA 12
• The NGC-UIT-ORD-12 must be installed in an • (Indoors)
nonhazardous, indoor location.
• The NGC-UIT-ORD-12 connects to NGC-30
panels using RS-485 communication wiring.
NGC-UIT-OUT Hazardous Locations* NEMA 4 or 4X
• Designed for mounting on the RAYCHEM • (Outdoors, solid-state
NGC-30 external panel door. re-lays)
• Class I, Division 2, Groups A, B, C, D NEMA 4X-P
• Class I, Zone 2, Group IIC • (Outdoors,
mechanical
• Temperature Class T4 relays with Z purge
Outdoor Locations option)
*Hazardous locations are defined by
Article 500 of the National Electrical Code and/or
Part 1, Section 18 of the Canadian Electrical Code.
WARNING:
Some wiring configurations will use more than one power source. All power sources must be
de-energized prior to performing any maintenance on a card rack module or its heating circuit.
The operating environment should be within the limitations specified for the RAYCHEM NGC-30
components as outlined in Appendices B, C, and D.

nVent.com |5
2.4 INSTALLATION LOCATION
The wide Operating Temperature of the RAYCHEM NGC-30 permits installation in almost
any convenient location. Considerations should include: expected atmospheric conditions
(weather), accessibility for maintenance and testing, the location of existing conduits, and
hazardous location rating. Ambient temperature conditions may affect load current ratings.
CAUTION:
Always be sure that the intended location is classified as an area that the product is approved
for use in as defined by Article 500 of the National Electrical Code and/or Part I, Section 18 of
the Canadian Electrical Code.
2.5 MOUNTING PROCEDURES
Each RAYCHEM NGC-30 panel includes a set of “As Built” drawings that have been engineered,
designed, and drafted based upon the model number and any special requirements that
were requested when ordering. The “As Built” drawings include an elevation/layout (with
bill of materials) and schematics. If these drawings are not included, contact your nVent
Representative and request the “As Built” drawings for your panel. Upon request, an electronic
copy of these drawings can be provided.
For mounting the panel, locate the elevation and layout drawing which includes a bill of
materials. The enclosure mounting information will be provided on the “As Built” drawings.
2.6 WIRING PROCEDURES
Refer to the “As Built” drawings for wiring of incoming/outgoing power and incoming RTD
connections. The RAYCHEM NGC-30 panel can be purchased with, or without, a distribution
panel board.
2.6.1 INCOMING POWER WITH DISTRIBUTION SYSTEM
Main Circuit Breaker
Locate the main circuit breaker in the panel by using the supplied elevation/layout drawing, and
connect per the associated schematic drawings. Depending upon the size and type of main
circuit breaker and voltage loss calculations, use the appropriate size and number of wires
to connect directly to the main circuit breaker, and panel board neutral and ground bus in the
panel.
Power wiring diagram
Panelboard
ground bus
Panelboard
neutral bus
ØA ØB
Incomming service
Three phase, 4 wire, 60 Hz
Main circuit
breaker
3-pole
ØC
Fig. 2.1 Main circuit breaker wiring
Branch Circuit Breakers
The branch circuit breakers are pre-wired to the contactors or solid-state relays in the panel, so
no further incoming power wiring is required.

6 |nVent.com
2.6.2 OUTGOING POWER WITH DISTRIBUTION SYSTEM
Load Power Terminal Blocks
Locate the outgoing heater terminal blocks using the supplied elevation/layout drawing, and
connect per the associated schematic drawings. Depending upon the size of the branch circuit
breaker and voltage loss calculations, use the appropriate size and number of wires to connect
from the panel’s Load Power Terminal Blocks to the heat-trace power junction box.
Heat tr
ace cable
TB- (Y)
CRM
TB*
EMR or
SSR
contacts
Branch
circuit
breaker
Load Power
Terminal
Block
Heat trace
junction
box
17
16
15
14
13
Cable-CT**
* Reference panel drawing for terminal block number
** Represents HTC circuit number 1-40
LCGF
CTM
connector
X
Fig. 2.2 Heat trace power wiring diagram
2.6.3 INCOMING/OUTGOING POWER WITHOUT DISTRIBUTION PANEL BOARD
Line Power Terminal Blocks
Locate the incoming power terminal blocks in the panel using the supplied elevation/layout
drawings and connect per the associated schematic drawing. Depending upon size and type of
the remotely located branch circuit breakers, use the appropriate size and number of wires to
connect directly to the Line Power Terminal Blocks.
Load Power Terminal Blocks
Locate the outgoing power terminal blocks in the panel using the supplied elevation/layout
drawings and connect per the associated schematic drawing. Depending upon size and type of
the remotely located branch circuit breakers, use the appropriate size and number of wires to
connect from the Load Power Terminal Blocks to the heater’s power connection box.
L1
LP *–L1 *–T1
C*
CB*
CB*
CTM–*
CT GF CT
TB*
T1
TB*
Heat trace cable
Single pole C.B.
Tw
o pole C.B.
N
N*–N *–N N
L1
LP *–L1 *–T1
C*
CTM–*
CT GF CT
TB*
T1
TB*
Heat trace cable
Line Power
Terminal Blocks
Load Power
Terminal Blocks
Line Power
Terminal Blocks
Load Power
Terminal Blocks
L2
LP *–L2 *–T2 T2
* Reference panel drawing for terminal block number
Fig. 2.3 Single pole and two pole circuit breaker wiring diagrams

nVent.com |7
2.6.4 INCOMING RTD WIRING
Nonhazardous and Hazardous Location Installations Wired to Terminal Block in Panel
The nVent RAYCHEM RTD wiring from the NGC-30-CRM/-CRMS have been pre-wired to
RTDterminals. The field RTD wiring (3-wire with shield) will be terminated by the installer at the
RTD terminal blocks. Refer to the Installation Drawings for the RTD Termination Schedule.
See Fig. 2.4 on page 8 for a typical RTD installation.
Note: To meet the requirements for hazardous location installations, a separate RTD terminal
block must be installed and wired to the NGC-30-CRM/-CRMS RTD terminal connector.
OPENOPEN
REDRED
REDRED
WHWH
SHLDSHLD
REDRED
REDRED
WHWH
RTD-RTD-
CRMCRM
Card Rack ModuleCard Rack Module
TB*TB*
SHLDSHLD
REDRED
REDRED REDRED
REDREDWHWH
(+)(+) (–)(–)
(+)(+)
(–)(–)
WHWH
44
33
22
11
CHASSIS GRDCHASSIS GRD
NGC-30-CRM/-CRMSNGC-30-CRM/-CRMS Panel Rear
Terminal Block
Panel Rear
Terminal Block
Field
Wiring
Field
Wiring
RTD-RTD-
* Reference panel drawing for terminal block number
Fig. 2.4 Typical RTD installation
2.6.5 CONNECTING THE RS-485 DEVICE NETWORK
The nVent RAYCHEM NGC-UIT display is typically linked to a network of RAYCHEM NGC-30-CRMs/-
CRMSs and optional RMM2s and PLIs. These are connected to the RAYCHEM NGC-UIT using an
RS-485 communication cable (shielded, two conductor, twisted pair). The following illustration
shows how the RS-485 network for the NGC-UIT system may be configured.

8 |nVent.com
TB12
MSBLSB
TB7TB6
TB13 TB 14 TB 15 TB 16 TB 17
TB1TB 2TB 3TB4TB 5
TB19
12 3
NGC-CRM/-CRMS
PLI
TB12
MSBLSB
TB7TB6
TB13 TB 14 TB 15 TB 16 TB 17
TB1TB 2TB 3TB4TB 5
TB19
12 3
0
Jumper
0
NGC-CRM/-CRMS
TB12
MSBLSB
TB7TB6
TB13 TB 14 TB 15 TB 16 TB 17
TB1TB 2TB 3TB4TB 5
TB19
12 3
NGC-CRM/-CRMS
TB12
MSBLSB
TB7TB6
TB13 TB 14 TB 15 TB 16 TB 17
TB1TB 2TB 3TB4TB 5
TB19
12 3
NGC-CRM/-CRMS
TB12
MSBLSB
TB7TB6
TB13 TB 14 TB 15 TB 16 TB 17
TB1TB 2TB 3TB4TB 5
TB19
12 3
NGC-CRM/-CRMS
RMM2
NGC-UIT
RMM2
PLI
nVent
NGC-UIT
NGC-UIT
NGC-
Device must be mounted in series.
(Terminated devices are shown in gray)
Branching of the network is not allowed.
Connect no more than two RS-485 cables to any device.
.
110
S2 S1
6
S
Norm
HN/H GABCNMixed
+
S
36
S+
0-9
.
220
6
0
.
110
S2 S1
6
S
Norm
HN/H GABCNMixed
+
S
36
S+
0-9
.
220
6
0
Fig. 2.5 RS-485 network configuration for the NGC-UIT system
In order for the nVent RAYCHEM RS-485 network to work properly, you must enable the
termination resistor for the first and last device. The devices shown in gray in Fig. 2.5 represent
the devices for which you must enable the termination resistors. The devices that are not grayed
out represent the devices for which you should not enable the termination resistors.

nVent.com |9
Optional RMM2 Installed in the Field
Refer to the nVent RAYCHEM RMM2 Installation Instructions (H56848) for field installation
instructions. You must connect a RS-485 connection from the RMM2 to an open nVent
RAYCHEM RS-485 connector on the NGC-30-CRM/-CRMS board in the RAYCHEM NGC-30
panel. To make this connection, a pre-wired terminal block has been provided in the RAYCHEM
NGC-30 panel. Connect the RS-485 wire from the RMM2 to TB (per the panel drawing) while
maintaining the correct polarity. If the RMM2 is the first or last device in the RS-485 network,
connect the J17 termination jumper to pins 1 and 2.
If the RMM2 is not the first or last device in the RS-485 network, connect the J17 termination
jumper to pins 2 and 3.
0
Jumper
RMM2
NGC-30-CRM/-CRMS #1NGC-UIT RS-485 NGC-30-CRM/-CRMS #8
NGC-30 Panel
RS-485 RS-485
RS-485
BK
WH
(–)
S
(+)
S
BK
TB*
WH
BK
TB*
3
WH
+
–
1
2
3
1
2
S
BK
TB*
WH
S
BK
TB*
3
WH
+
–
+
–
1
2
3
1
2
SS
BK
WH
S
+
–
BK
WH
S
6
4
5
TB*
1
3
2
4
6
5
J17
123
Default position (for all RMM2
units in network except first or last one)
J17
123
Termination mode
(first or last RMM2 in network)
Last RMM2 in network
J17
123
* Reference panel drawing for terminal block number
Fig. 2.6 RMM2 RS-485 field wiring and termination jumper setting

10 |nVent.com
Optional PLI Installed in the Panel
Refer to the PLI Installation Instructions (H56850). You must connect a RS-485 connection
from the PLI to an open RS-485 connector on the NGC-30-CRM/-CRMS board in the RAYCHEM
NGC-30 panel. IF the PLI is the first or last device in the RS-485 network, remove the shorting
block jumper location J2 from 1 and 2 and place it across pins 2 and 3.
NGC-30-CRM/-CRMS #1NGC-UIT RS-485 NGC-30-CRM/-CRMS #8
NGC-30 Panel
RS-485 RS-485
BK
WH
(–)
S
(+)
S
BK
TB*
WH
BK
TB*
3
WH
+
–
1
2
3
1
2
S
BK
TB*
WH
S
BK
TB*
3
WH
+
–
1
2
3
1
2
SS
1
3
2
4
6
5
J2
123
Default position (for all PLI
units in network except first or last one)
J2
123
Termination mode
(first or last PLIin network)
* Reference panel drawing for terminal block number
.
110
S2 S1
6
S
Norm
HN/H GABCNMixed
+––
S
36
S+
5
.
220
9
5
Last PLI in network
J2
123
RS-485 connections
Fig. 2.7 PLI RS-485 panel wiring and termination jumper setting
NGC-UIT Installation
The nVent RAYCHEM NGC-UIT-ORD and NGC-UIT-OUT will come pre-wired into any NGC-30 panel.
Exceptions exist when a remote mount NGC-UIT (NGC-UIT-ORD-12) is used or the NGC-30 panel
is wired to the NGC-UIT in another panel. Fig. 2.8 shows the wiring for the NGC-30-ORD-12 and
Fig. 2.10 shows the wiring between a separate panel and the NGC-UIT.
NGC-UIT-ORD-12 Installation
You must make an RS-485 connection from the NGC-UIT-ORD-12 to the NGC-30-CRM/-CRMS
board in the NGC-30 panel. To make this connection, a pre-wired terminal block has been
provided in the NGC-UIT-ORD-12 and in the NGC-30 panel. Connect the RS-485 wire from TB3
in the NGC-UIT-ORD-12 and the other end to TB* in the NGC-30 panel maintaining the correct
polarity. If the NGC-UIT-ORD-12 and/or the NGC-30-CRM/-CRMS is the first or last device in the
RS-485 network, see Fig. 2.9 and Table 3.2 for details on how to terminate the RS-485 network.
* Reference panel drawing for terminal block numbers.

nVent.com |11
1
FU1
2345
HHNN
123 123456789
AR
456
Grounding bar
NGC-UIT- ORD-12
TB1
Line voltage Alarm relay
TB2
RS-485
TB3
Field Host
NGC-30 Panel #1
NGC-30-CRM/-CRMS #1
RS-485
NGC-30-CRM/-CRMS #8
RS-485
TB*
BK
TB*
3
WH
+
–
1
2
3
1
2
S
BK
TB*
WH
S
BK
TB*
3
WH
+
–
+
–
1
2
3
1
2
S
BK
WH
S
+
–
BK
WH
S
1
3
2
TB*
* Reference panel drawing for terminal block number
+–
Fig. 2.8 NGC-UIT RS-485 field wiring
The following figure shows the RS-485 termination options for the NGC-30-CRM/-CRMS.
NGC-30-CRM/-CRMS
TB 12
MSB LSB
TB 7 TB 6
TB 13 TB 14 TB 15 TB 16 TB 17
TB 1TB 2TB 3TB 4TB 5
TB 19
1 2 3
Normal
position End of Line
position
3
2
13
2
1
End of Line (EOL) Jumper
If this device (NGC-30-CRM/-CRMS) is
the first or last device in the RS-485
network, move the J1 jumper from
terminals 2 & 3 to terminals 1 & 2.
Fig. 2.9 Termination of RS-485 network for NGC-30-CRM/-CRMS
NGC-30 Panel with NGC-UIT Connected to an NGC-30 Panel without NGC-UIT
This wiring is used when a single UIT in one panel is the central point for multiple NGC-30
panels. Because the NGC-UIT can handle up to 260 heat tracing circuits, it can be cost effective
to use one NGC-UIT for multiple panels. An RS-485 connection must be made from the panel
that has the NGC-UIT (panel #1) installed to the NGC-30-CRM/-CRMS board in NGC-30
(panel #2) that does not have the NGC-UIT installed (see Fig. 2.10). To make this connection,
a pre-wired terminal block has been provided in the panel #1 and in panel #2. Connect the
RS-485 wire from TB* in panel #1 and the other end to TB* in panel #2 maintaining the
correct polarity.

12 |nVent.com
If the NGC-30-CRM/-CRMS is the first or last device in the RS-485 network, see Fig. 2.9 and
Table 3.2 for details on how to terminate the RS-485 network.
* Reference panel drawing for terminal block numbers.
NGC-30-CRM/-CRMS #1NGC-UIT RS-485 NGC-30-CRM/-CRMS #8
NGC-30 Panel #1
RS-485 RS-485
RS-485
BK
WH
(–)
S
(+)
S
BK
TB6
WH
BK
TB6
3
WH
+
–
1
2
3
1
2
S
BK
TB6
WH
S
BK
TB6
3
WH
+
–
+
–
1
2
3
1
2
SS
BK
WH
S
+
–
BK
WH
S
6
4
5
TB*
1
3
2
4
6
5
NGC-30 Panel #2
without UIT installed
NGC-30-CRM/-CRMS #1
RS-485 NGC-30-CRM/-CRMS #8
RS-485
TB6
BK
TB6
3
WH
+
–
1
2
3
1
2
S
BK
TB6
WH
S
BK
TB6
3
WH
+
–
+
–
1
2
3
1
2
S
BK
WH
S
+
–
BK
WH
S
3
1
2
TB*
* Reference panel drawing for terminal block number
Fig. 2.10 RS-485 field wiring between two RAYCHEM NGC-30 panels
2.7 CONNECTIONS FOR REMOTE ANNUNCIATION
Relay 1 on the NGC-UIT has been factory-configured and wired for “Any Alarms” unless
otherwise specified. It is powered by 120 Vac and will energize a light on the front of the panel
if any alarm occurs. Relay 1 was also wired to a common alarm relay/terminal block for remote
annunciation of any alarms. Please see below the NGC-UIT Relay 1 in non-energized, energized
and in alarm condition.
NGC-UIT Relay 1
TB*
AR–NO
AR–COM Common
alarm
output
AR–NC
1
2
1
3
AR
AR
2
3
* Reference panel drawing for terminal block number
TB*
AR–NO
AR–COM Common
alarm
output
AR–NC
1
2
1
3
AR
AR
2
3
TB*
AR–NO
AR–COM Commo
n
alarm
output
AR–NC
1
2
1
3
AR
AR
2
3
Non-energized Energized without an
alarm condition
Energized with an
alarm condition
Fig. 2.11 Relay 1 wiring

nVent.com |13
The NGC-UIT has two other Form C alarm relays (configurable through the NGC-UIT program)
for external alarms. Each relay can be connected to an annunciator light or distributed control
system. Each relay’s contacts have been wired from the NGC-UIT to a terminal block in the
panel.
NGC-UIT Relay 2
NGC-UI
T Relay 3
10
9
11
UIT-R3-COM
UIT-R3-NO
UIT-R3-NC
8
7
9
TB*
* Reference panel drawing for terminal block number
6
5
7
UIT-R2-COM
UIT-R2-NO
UIT-R2-NC
4
5
6
TB*
6
5
7
UIT-R2-COM
UIT-R2-NO
UIT-R2-NC
4
5
6
TB*
6
5
7
UIT-R2-COM
UIT-R2-NO
UIT-R2-NC
4
5
6
TB
*
Non-energized Energized without an
alarm condition
Energized with an
alarm condition
Non-energized Energized without an
alarm condition
Energized with an
alarm condition
10
9
11
UIT-R3-COM
UIT-R3-NO
UIT-R3-NC
8
7
9
TB*
10
9
11
UIT-R3-COM
UIT-R3-NO
UIT-R3-NC
8
7
9
TB
*
Fig. 2.12 Relays 2 and 3 wiring
Note: An energized relay with no alarm condition will change state with loss of power or an
alarm condition.

14 |nVent.com
2.8 RS-232, RS-485, OR ETHERNET REMOTE PORT CONNECTIONS TO A HOST COMPUTER
The NGC-UIT can communicate with a distributed control system (DCS) or other host
computer through the NGC-UIT external communication ports. The NGC-UIT provides ports for
RS-232, RS-485, and Ethernet communication. All of these communication ports provide data
read access. However, only one port can be assigned read/write access. This is done using the
NGC-UIT.
2.8.1 RS-232 SERIAL CONNECTIONS
The RS-232 port can be used as a direct connection to a single PC located within 50 feet of the
panel. (Refer to Fig. 2.13 on page 15). For an RS-232 connection, a 3-foot long RJ11 to 9-pin
female D-connector (NGC-UIT-232, part number: 10332-005) has been provided with the
NGC-UIT. Plug the RJ11 connector into the RS-232 connector on the NGC-UIT and the other end
into the 9-pin male connector on the user’s computer.
10/100
Ethernet
RS-232
(DCE)
Local
SIG – SIG + Shield SIG – SIG + Shield
4
3
Relay 1
RemoteField
21654321
9-pin
male
PC Laptop
9-pin
female
3-foot RJ11 to
9-pin female D connector
Fig. 2.13 RS-232 connection
2.8.2 RS-485 SERIAL CONNECTIONS
Use the RS-485 port when multiple NGC-UIT units are to be connected to a host computer or
the connection is longer than 50 feet. An RS-485 to RS-232 or RS-485 to USB converter may be
required to make the connection to the user’s PC.
9-pin
female
9-pin
male
To NGC-30-CRM/-CRMS
NGC-UIT
BK
WH
(–)
––
S
(+)
SRS-485
BK
WH
S
BK
WH
S
1
3
2
1
3
2
4
6
5
TB*
PC
RS-485 Converter
NGC-30 Panel
+ +
* Reference panel drawing
for terminal block number
Fig. 2.14 RS-485 connection
2.8.3 ETHERNET CONNECTIONS
The Ethernet port can be used to connect multiple NGC-UIT units to a host computer by
connecting to the user’s LAN system.

nVent.com |15
10/100
Ethernet
RS-232
(DCE)
Local
SIG – SIG + Shield SIG – SIG + Shield
4
3
Relay 1
RemoteField
21654321
Network node
Ethernet cable
Fig. 2.15 Ethernet connection
2.9 TESTING THE NGC-30 SYSTEM
Once the wiring to the panel has been finished, confirm that it was done properly by completing
the following steps:
1. Turn the power on to all network devices (NGC-30-CRMs/-CRMSs and optional RMM2s &
PLI modules) and the NGC-UIT.
2. Once the NGC-UIT has booted up to the Main screen, Go to the Network | Device Screen and
press “Update Network.”
Fig. 2.16 Network|Devices screen
3. Confirm all NGC-30-CRM/-CRMS, RTDs and/or RMM2s and PLI modules have been scanned
into the Network database.
4. If a device or an RTD is installed but does not show up in the Network | Devices Screen,
turn the power off to the system and:
For Devices:
a. Confirm the device has a unique address (refer to section 3.2 on page 21)
b. Confirm the device is being powered
c. Confirm the RS-485 connection is in place with the correct polarity (refer to section 2.6.5)
For RTDs:
a. Confirm the RTD connection is in place with the correct polarity
b. Perform a resistance check of the RTD. The resistance should be in a range of
70–250 ohms
Turn the power on to all devices (NGC-30-CRMs/-CRMSs and optional RMM2s & PLI) and the
NGC-UIT. Once the NGC-UIT has booted up to the Main screen, Go to the Network | Device
Screen and press “Update Network.” Confirm all NGC-30-CRM s/-CRMSs, RTDs, and/or
RMM2s and PLI modules have been scanned into the Network database.

16 |nVent.com
SECTION 3 – RAYCHEM NGC-30 COMPONENTS AND OPERATION
The RAYCHEM NGC-30 heat-trace system is comprised of a number of modular components,
allowing the ultimate in design flexibility. This section describes the NGC-30 control and
monitoring components (excluding the optional distribution section). Appendix B, C, and D
includes the specifications for these components.
3.1 USER INTERFACE TERMINAL (NGC-UIT)
The NGC-UIT is a panel mounted color LCD display with touch-screen overlay. The NGC-UIT
includes software that interfaces with the Card Rack Modules (NGC-30-CRM and
NGC-30-CRMS) and the Remote Monitoring Module (RMM2) and Power Line Carrier Interface
(PLI) module. The NGC-UIT is used as a control panel, setup device and user display.
3.1.1 MULTIPLE NGC-UIT MODELS
There are three versions of User Interface Terminals (UITs) available as specified in Table 2.1,
“NGC-30 User Interface Terminals (UITs),” on page 5. All versions use the same wiring, system
interface, and programming. The NGC-UITs differ only in the environments in which they can
be installed. The term “NGC-UIT” in this document refers to any of the available NGC-UITs,
regardless of which model is actually installed.
Fig. 3.1 Typical NGC-UIT model showing NGC-UIT-ORD-12 remote user interface terminal
The physical dimensions of each NGC-UIT model vary; the dimensions of the NGC-UIT-ORD-12
shown in the figure are the largest of all NGC-UITs:
• Width: 15" (381 mm)
• Height: 11.8" (300 mm)
• Depth: 6.1" (155 mm)
NGC-UIT LCD Touch-Screen Display
Each NGC-UIT has a 5 ¾ inch x 3 ¼ inch (14.61 cm X 8.26 cm) LCD color display with touch-
screen technology that provides an user interface easy and efficient programming with no
keyboards or cryptic labels.
3.1.2 NGC-UIT LOCAL AND REMOTE NETWORK CONNECTIONS
The NGC-UIT communicates to both a local field network and optionally to a remote
monitoring and control network.

nVent.com |17
Local Field Network Connection
The local field network always uses an RS-485 serial connection running over shielded twisted-
pair cable. This network is used to connect the NGC-UIT to its control and monitoring modules:
• RAYCHEM Mechanical Contactors Controller - NGC-30-CRM
• RAYCHEM Solid State Relay Controller - NGC-30-CRMS
• RAYCHEM Current Transformer Module Controller - NGC-30-CTM
• RAYCHEM Voltage Monitoring Module - NGC-30-CVM
• RAYCHEM Remote Monitoring Module - RMM2
• RAYCHEM Power Line Carrier Interface Module - PLI
The local field network must follow configuration rules about topology and termination of
network end devices.
Remote Monitoring and Control Network Connection
The remote monitoring and control network communicates via a selectable network
connection port using either RS-485, RS-232, or 10/100Base-T Ethernet. This network is
used to connect to multiple NGC-UIT systems and communicate with a central PC running
RAYCHEM Supervisor software. The RAYCHEM Supervisor software provides centralized
status and alarm monitoring, data logging, and remote configuration control over all attached
NGC-UIT systems in the network. The remote monitoring and control network must also follow
configuration rules about topology and termination of the network end devices.
Front view
Bottom view
Side view
Not to scale
TX
TX
1
3
USB
RX Field
RX Local/Remote
2 Output
relays
Status
Reset
Side View
USB
OFF TERM R-Field
OFF TERM R-Remote
OFF WDT
ON
ON
ON
10/100
Ethernet
RS-232
(DCE)
Local
N/L2 Line/L1 SIG – SIG + Shield SIG – SIG + Shield
1110
93
21876543
Relay 3Relay 2Relay 1
RemoteField
21654321
Fig. 3.1 NGC-UIT touch-screen display, controls, and connections

18 |nVent.com
3.1.3 NGC-UIT LED STATUS
The LED Status lights are located on the side of the NGC-UIT. Refer to Table 3.1
for LED functions.
Table 3.1 LED Status Light Functions
OFF No power No activity No activity No activity No activityNo USB key
detected
Relay in
NO position
Green Normal
operation*
Flicker on
receipt of
data packet
Flicker on
transmission
of data
packet
Flicker on
receipt of
data packet
Flicker on
transmission
of data
packet
USB key
inserted*
Relay
energized
contacts in
NC position
Yellow
* State controlled by software, all other states controlled by hardware.
UIT loadingUSB in use*
LED functions
TX
TX
1
3
USB
RX Field
RX Local/Remote
2 Output
relays
Status
State Status USB RX TX RX TX
Field Local/Remote
Relays
3.1.4 CONFIGURATION SWITCHES
The configuration switches are also located on the side of the NGC-UIT. The TERM R-FIELD
setting refers to the local RS-485 network that connects the NGC-UIT to attached -CRM, -CRMS,
and/or RMM2 devices. The TERM R-REMOTE SETTING refers to connections between the
NGC-UIT and a central PC running RAYCHEM Supervisor software. Refer to Table 3.2 for
LED functions.
Table 3.2 Configuration Switch Functions
120 Ohm
Termination Enabled
(Factory Default)
Termination
Disabled
TERM R-FIELD
(Field Port
Termination Select)
Terminates local
RS-485 network.
TERM R-REMOTE
(Remote Port
Termination Select)
Terminates remote
RS-485 network
connected to PC and
Raychem Supervisor
software.
120 Ohm
Termination Enabled
Termination
Disabled
(Factory Default)
For the REMOTE RS-485
network connected to a PC.
If this NGC-UIT is the first
or last RS-485 device in the
remote network, it must be
set to ENABLED/ON. If the
NGC-UIT is NOT the first or
last device, it must be set to
DISABLED/OFF.
WDT
(Watch Dog Timer)
WDT Enabled
(Factory Default)
WDT Disabled WDT should normally
be enabled
Configuration Switches
OFF TERM R-Field
OFF TERM R-Remote
OFF WDT
ON
ON
ON
For the local FIELD RS-485
network. If this NGC-UIT is the
first or last RS-485 device in the
network, it must be set to
ENABLED/ON. If the NGC-UIT is
NOT the first or last device, it
must be set to DISABLED/OFF.
3.1.5 NGC-UIT RESET SWITCH
The reset switch is located on the side of the NGC-UIT panel. A pointed object is required to
press the restart switch and restart the UIT software.
TX
TX
1
3
USB Status
Reset
USB
ON
ON
ON
USB Status
Reset
USB
USB
Status
USB
Fig. 3.2 Reset switch

nVent.com |19
3.2 CARD RACK MODULE (NGC-30-CRM/-CRMS) AND CURRENT TRANSFORMER MODULE (NGC-30-CTM)
Each Card Rack Module (NGC-30-CRM and NGC-30-CRMS) and Current Transformer Module
(NGC-30-CTM) provide ground-fault and line current sensing, alarming, switching, and RTD
input for five Loops. The NGC-30-CRM is used with electromechanical relays. The
NGC-30-CRMS is used with solid-state relays. The NGC-30-CRM/-CRMS may be connected to
one User Interface Terminal (NGC-UIT).
Each NGC-30-CRM/-CRMS must have a unique communication address. The valid address
switch range for the NGC-UIT is 1–99. SW1 is the ones digit (0–9) and SW2 is the tens digit
(0–9). See Fig. 3.3.
Note: RMM2s use ModBus addresses 32 through 47 and PLIs use Modbus addresses 1-99.
When using RMM2s and PLI modules in an NGC-30 system, care must be taken to not assign
the same addresses to an RMM2, PLI module or an NGC-30-CRM/-CRMS board.
LSBMSB
SW1SW2
3
8
Fig. 3.3 Communication address switch
Note: When adding an NGC-30-CRM/-CRMS to the system, power must be cycled to the board and a
network update on the NGC-UIT must be performed.
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
Address Switches
NGC-30-CRM/-CRMS
TB 12
MSB LSB
TB 7 TB 6
TB 13 TB 14 TB 15 TB 16 TB 17
TB 1 TB 2 TB 3 TB 4 TB 5
TB 19
1 2 3
1
2
3
4
5
6
7
8
9
10
6 7
10
1 2 3 4 58
9
Fig. 3.4 NGC-30-CRM/-CRMS Board l Layout
Each NGC-30-CRM/-CRMS has a cluster of nine LED lights to advise the status of the board.
Number 3 in Fig. 3.4 shows the location of the LED lights.

20 |nVent.com
Table 3.3 LED Display
Alarm
LED function
LED descriptionLED color
Energized upon Alarm Red
PowerEnergizes upon power to unit Green
Relays 1, 2, 3, 4, 5Energizes upon relay closed Red
RX & TX Energizes upon received and
transmit of RS-485 data
Amber
Power Relay 1 Relay 3 Tx
Alarm
Relay 2 Relay 4
Rx
Relay 5
LED functions
3.3 CARD RACK (NGC-30-CR)
The Card Rack (NGC-30-CR) has the capability to house one to four Card Rack Modules
(CRMs).
Fig. 3.5 NGC-30 card rack
3.4 VOLTAGE MONITORING MODULE (NGC-30-CVM) – OPTIONAL
The optional voltage sensor can monitor 80–290 Vac. This voltage sensor connects to one
of the five line current/ground-fault inputs of the NGC-30-CRM/-CRMS (Note: By using the
optional voltage sensors, the NGC-30-CRM/-CRMS board looses one circuit).
Fig. 3.6 NGC-30 voltage monitoring module