RAYCHEM
NGC-UIT-ORD to NGC-UIT3-EX
Conversion Instructions 

NGC-UIT3-EX installed in a panel

KIT CONTENTS

Qty| Description| Manufacturer| Part
Number
---|---|---|---
1| 12 Vdc Power Supply| Lambda| DSP60-12
2| Serial Communication cables,
10 ft.| L-Com| CSMN9MF-10
3| Alarm Relays – 12 V, 12 A, SPDT| TE Connectivity| RTB14012F
3| Alarm Relay Sockets| TE Connectivity| RT78724
1| NGC-UIT3-EX and mounting
hardware (12 Kep nuts, 6/32 in)| nVent| 10332-032
1| DIN35 Rail, 10 inches| N/A|
1| Template for replacing UIT1 with UIT3| nVent|
3| Ground Terminal Blocks| Phoenix Contact 3031238| 3031238
4| End Clamps| Phoenix Contact 0800886| 800886

Optional–To be purchased separately–UIT3 Window Kit P/N T1011164

DESCRIPTION

These instructions will guide the installer on how to convert from nVent RAYCHEM NGC-UIT-ORD to nVent RAYCHEM NGC-UIT3-EX and are intended only for personnel experienced in panel constructions. This kit can also replace a NGC- UIT-OUT if installed in a nonhazardous area. If installed outdoors in nonhazardous area, then a protective cover is required. The use of “NGC-UIT- ORD” can be interchanged with “NGCUIT-OUT” throughout this conversion instruction.

TOOLS REQUIRED

• Masking tape

• 16 (3/16) drill bit

• 3/8 drill bit
• Metal file
• In-line torque wrench with 8mm (5/16 in) socket
• Jig saw (recommend using carbon steel blade with 24TPI)

SPECIFICATIONS

General|
---|---
Area of Use| Ordinary (nonhazardous) and Hazardous locations, indoors or outdoors (IP65, Type 4X)
Supply Voltage| 12 -27VDC, 3A – 1.1A respectively, 30W max / 16W nominal, AWG 16-20 (1.31 mm2 0.52 mm2)
Operating Temperature| -40°C to 60°C (-40°F to 140°F)
Storage Temperature| -40°C to 80°C (-40°F to 176°F)
Dimensions| 279 mm W X 229 mm H X 70 mm D (11 in. W X 9 in. H X 2.75 in. D)
Alarm Outputs|
Transistor open collector outputs| 5 – 30 Vdc with a max. sink current of 500 mA, AWG 16-20 (1.31 mm2 – 0.52 mm2)
Use to drive external relays| Relays may be assigned for alarm outputs.
LCD Display|
Display| LCD is a 8.4 in. color XGA with integral LED backlight
Touch Screen| 5-wire resistive touch screen interface for user entry, compatible with glove use
Network Connection|
Local/Remote Port| RS-232/RS-485 ports may be used
to communicate with host computers
(nVent RAYCHEM Supervisor Software) or DCS
Local RS-232| A non-isolated, 9 pin D sub male
Remote RS-485 #2| 2-wire isolated
Data Rate| 9600 to 57600 baud.
Maximum cable length| For RS-485 not to exceed 1200 m (4000 ft). Cable to be shielded twisted pair.
Field Port| RS-485, 2-wire isolated. Used to communicate with external devices, such as NGC-30-CRM and RMM2. Maximum cable length not to exceed 1200 m (4000 ft). Cable to be shielded twisted pair.
Field RS-485 #1| 2-wire isolated
Data Rate| To 9600 baud
LAN| 10/100 Base-T Ethernet port with Link and Activity Status LEDs
USB Ports| USB 2.0 Host port Type A receptacle (X2)

WARNING:
FIRE Hazard: The NGC-UIT3-EX must not be used in hazardous locations. Electrical components within the unit could ignite flammable gases. Do not install the unit where it may be exposed to flammable gases.

IMPORTANT:
The NGC-UIT3-EX is an electronic unit. During installation, take the following precautions to avoid damage to its electronic components.

• Handle with care to avoid mechanical damage.
• Keep electronics dry.
• Avoid exposure to static electricity.
• Avoid contamination with metal filings, liquids, or other foreign matter.
• Take care to protect the user interface board on the enclosure door.
• Use agency-approved conduit bushings, adapters, and cable glands to keep the enclosure protected from dust and fluids.

1. Removing the Existing NGC-UIT-ORD
   ** CAUTION** – Power to the Electrical panel that is housing the NGC-UIT- ORD must be turned OFF before proceeding.

1. Disconnect the cables from the NGC-UIT-ORD by loosening the retaining screws that secure the Phoenix connectors to the mating terminals on the NGC- UIT-ORD. This includes the serial communications (RS-485), Relay outputs and AC Input.

2. Removing the Existing NGC-UIT-ORD
   1. Loosen and remove all 10 screws and remove the NGC-UIT-ORD from the panel door.
   

3. Removing the Existing NGC-UIT-ORD
   1. Disconnect the wires from the Phoenix connectors. Undo all the cable ties for the wiring bundle to the NGC-UIT-ORD. These wires will be used for the NGC-UIT3-EX once it is installed.

Enlarging the NGC-UIT opening

Use the foldout template as the guide for enlarging the cutout.
Template is actual size (see attached at back of booklet)
Instructions

1. Line up the upper left hand corner of the template with the existing cutout. Use masking tape to secure the template to the panel door. The dashed lines indicate the  areas that must be removed.

2. Using a center punch, mark the 12 mounting holes, M1–M12.

3. Using a center punch, mark the 3 holes used to insert a cutting blade, H1–H3.

4. After making the marks using the center punch, remove the template.

5. Using a straight edge and marking pen, draw a line starting from the upper left hand corner to the center of hole H1. Repeat the line from the center of hole H1 to H2  and H3.

6. Use a 3/16 drill bit and drill all 12 mounting holes, M1–M12.

7. Use a 3/8 drill bit and drill the 3 holes used to insert the cutting blade, H1–H3.

8. Using a jigsaw start the cut from the bottom left corner of the existing cutout and follow the marked line to the center of hole H1. Continue the cut to hole H2 and H3.
   End the cut at the upper right hand corner of the existing cutout.

9. Debur all cut edges before installing the new UIT3.

Installing the NGC-UIT3-EX

1. Insert the NGC-UIT3-EX into the panel door opening.
   Verify that the gasket that came with the NGC-UIT3-EX is properly installed. Secure the UIT3 using the twelve 8-32 nuts and hardware.

2. After the display is properly positioned, tighten the nuts to 0.9 newton-meters (8-inch-pounds) of torque using a 8mm (5/16 in) wrench. Tighten Kep nuts in the sequence shown for proper sealing.

Installing the DIN Rail components

1. Locate an area in the panel where the components mounted on the DIN rail can be installed. If there is DIN rail space available then mount these on components on the available space.

Connect Power

1. Connect the AC voltage wires that were removed from the NGC-UIT to the AC input on the 12V power supply. Refer to wiring diagram below. The illustration below shows the wires from the UIT1 (dashed lines) going to the power supply AC input.
2. Connect the DC side of the power supply to the UIT3 DC input, one side of the alarm relays and DC input to the alarm relay driver outputs.

Connecting the Alarm Relays

1. The illustration below shows the wiring for the alarm relays from UIT1 (dashed lines) to UIT3. TB-X’s are the field terminals. Refer to the panel wiring for location of the field terminals.
2. Connect the Relay Driver Output signals to the relays shown in the illustration below.

Communications

1. The illustration below shows the wiring for RS-485 ports from UIT1 (dashed lines) to UIT3. Refer to the panel wiring for location of the field terminals.
2. Connect the RS-485 serial cables to the appropriate comm port on the UIT3 as shown in the illustration.

NGC-UIT3-EX Cut Out Dimensions

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
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©2022 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-H58770-NGCUITUIT3-EN-2201

nVent.com/RAYCHEM

References

• Electrical Heat Tracing | Heat Tracing | nVent RAYCHEM

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