RSE-0938-4
Gas Detector with Signal Converter
SD-3NC Series SPECIFICATION
ModelDetection principle
Detection gas*1
Display
Detection range*1
Alarm set points*1
Sampling method
Setting flow rate
Power supply indication
Alarm type
Gas
Indication
alarm
Reset type*1
Self-diagnosis
Indication
Fault alarm
Reset typeSelf-diagnosis
Warnings

Display
Operation

Functions
External output*1
Transmission
MethodGas
concentration
signalTransmission
Specifications
Transmission
cable*2
Transmission
Distance＊7

Alarm contact (Optional)*1
Input voltage range*3
Power supply

Power supply cable*2＊7Power consumptionMaterial
Cable connectors*1

Housing

Tube connecting port
Degrees of protection
Installation type*1
External dimensions*5
Weight*5

Operating temperature range*4
Operating humidity range*4
Operation method
Type of protection
Explosionproof
approvals

ATEX/UKEX
IECEx

Japan Ex
Functional safety(IEC61508:2010)*6
Certification

SD-3NC
SD-3DNC
New ceramic type (catalytic type)Combustible gas
7-segment LED (5 digits), 3-color lamp (red, green, yellow)
Depends on sensor specifications
Depends on sensor specifications
Diffusion type
Suction type (pour into by external unit)－0.4 - 1.5 L/min
Power lamp lit (green)Two-step alarm (H-HH)
Alarm lamp lit (red)Auto reset or self-latching
System abnormality (E-9), sensor abnormality (E-1)
Fault lamp lit (yellow), error code display
System abnormality: Self-latching
Sensor abnormality: Auto reset (self-latching if sensor is disconnected)
Sensor life assessment, clock abnormality diagnosis, communication diagnosis, sensor
warning
Blinking display alternating between gas concentration and error code
Same as normal operation
Alarm delay, suppression, zero follower, HART communication (HART7)
Gas concentration signal (4-20 mA DC with HART output), contact output (optional)
3-wire analog transmission (common power supply <power supply, signal, common>) or
2-wire analog transmission (current source)
4-20 mA DC (non-insulated linear output)
Maximum load resistance 600 Ω (with derating depending on power supply voltage)
Resolution: max. 200 divisions (depending on specifications)Shielded cable 1.25 sq (1.308 mm2/AWG16) or
2.0 sq (2.08 mm2/AWG14) (same as power supply cable)
For 1.25 sq (1.308 mm2/AWG16): Not exceeding 1.25 km
For 2.0 sq (2.08 mm2/AWG14): Not exceeding 2 km (with derating depending on supply voltage)
SPDT (× 3): 2 alarms, 1 fault output, non-exciting at normal(exciting at alarm) or exciting
at normal(non-exciting at alarm), 250 V AC, 2 A; 30 V DC, 1 A(resistance load), Minimum load
5V DC, 0.1A
24 V DC (18 V - 30 V DC)
Shielded cable 1.25 sq (1.308 mm2/AWG16) or2.0 sq (2.08 mm2/AWG14) (same as transmission cable)
Max. 4.5 W
Stainless steel: SCS14 (equivalent to SUS316）
ATEX/IECEx/UKEX：M25 × 1.5, conversion adapter (optional): NPT3/4, NPT1/2, M20 × 1.5
Japan Ex：Flame proof packing method <M20×1.5>(Compatible cables φ6.0～12.0mm), <M25×1.5>(Compatible cables φ12.0～16.0mm)－NPT1/4 (with SUS elbow union for O.Dφ8-1t)
Equivalent to IP66/67
Wall mounting (standard)/2B pole mounting (optional)
Approx. 171(W) × 277(H) × 127(D) mm
Approx. 171(W) × 289(H) × 127(D) mm(excluding projections)(excluding projections)
Approx. 6.7 kg
Approx. 7.0 kg
ATEX/IECEx/UKEX：-40 ℃ - +70 ℃ (no sudden changes)
Japan Ex：-20 ℃ - +70 ℃ (no sudden changes)
0 %RH - 95 %RH (no condensation)
Dedicated magnet control key
Flameproof construction
Ⅱ 2 G Ex db ⅡC T5/T4 Gb, -50℃≦Ta≦+44℃/+70℃ (when lightning arrester is not installed),-40℃≦Ta≦+44℃/+70℃ (when lightning arrester is installed)
Ex db ⅡC T5/T4 Gb, -50℃≦Ta≦+44℃/+70℃ (when lightning arrester is not installed),-40℃≦Ta≦+44℃/+70℃ (when lightning arrester is installed)
Ex db ⅡC T4 Gb, -20℃≦Ta≦+70℃
SIL2 capable (HFT=0), SIL3 capable (HFT=1) with redundancy
CE Marking, UKCA Marking*1 Please specify your request when ordering.
*2 To ensure explosion protection, use a cable designed for use in temperatures at least 5 ℃ above the maximum anticipated ambient temperature.
*3 Use a power supply capable of minimum temporary output of 2.5 A to ensure that fuses blow normally in the event of a product abnormality.
*4 In accordance with sensor specifications if restrictions apply due to sensor specifications.
*5 External dimensions and weight exclude cable gland.
*6 External units used in combination with SD-3DNC should be selected from SIL certified products.
*7 Depends on the type of cable.

RSE-0938-4
Dimensional drawings (Excluding cable gland)＜Diffusion type＞＜Suction type＞* Pour into by external unit

74

74

-Terminal Block Diagram＜Using 3-core cable＞
Terminal
No.

＜Using 4-core cable＞
Terminal
No.

Power/signal cable connection

１

Power supply (+)

２Common(Power supply (-), signal (-))

３Signal(+)

４Not used１

24 V DCPower/signal cable connection
Power supply (+)
24 V DC

4-20 mAwith
HART

２Power supply (-)

３Signal (+)

４Signal (-)

4-20 mA
withHART＜Contact output (Optional)＞
Relay1 (ALARM1)
Terminal
No.
１
２
３

Cable connection
N.O.
CommonN.C.

N.O.：Normal Open
N.C.：Normal Close

Relay2 (ALARM2)
Terminal
No.
１２
３

Cable connection
N.O.
CommonN.C.

Relay3 (FAULT)
Terminal
No.
１２３

Cable connection
N.O.
CommonN.C.