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NGC-30-CRM/-CRMS and NGC-30-CTM
EN
Description
DE
The nVent RAYCHEM NGC-30-CRM/-CRMS and NGC-30-CTM
FR
provide ground-fault and line current sensing, alarming, switching
and RTD inputs for five heat-tracing circuits when used with the
RU
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
•
Screw driver small blade - standard
•
RJ11 stripping/crimping tool
Additional Materials
•
Power supply - 12 Vdc @ 400 mA-per NGC-30-CRM/-CRMS board
•
RJ11 4 conductor cable
C
Kit Contents
Item Qty Description
NGC-30-CRM or CRMS (card rack module with
A
1
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.
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4
nVent.com/RAYCHEM
•
Wire cutters
•
RJ11 connectors
D
A
B
General
Supply Voltage
12 Vdc ± 10%
Internal power
< 5 W per NGC-30-CRM/-CRMS
consumption
Ambient operating
–40°F to 140°F (–40°C to 60°C)
temperature
Ambient storage
–40°F to 167°F (–40°C to 75°C)
temperature
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
Five for ground-current measurement
NGC-30-CTM
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 span
Outputs
CRM output
Form A 3-Amp @ 277 Vac max 50/60 Hz
relays
(CSA), 1.5 A MAX @ 277 Vac max 50/60 Hz
(IECEx/ATEX/UKEX)
CRMS SSR
12 Vdc @ 30 mA max per output
outputs
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
Cable
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/
0.8 - 3.3 mm
2
Pilot Relay/ RTD/
client provided wiring, 70°C or higher Tightening
Comm Port
torque: min 0.5 Nm, max 0.6 Nm
(RS485)
* If required a Repeater can be used.
(18-12 AWG) Minimum rating of
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