Riken Keiki SD-3 Series User manual

PT2E-3562
Gas Detector with Signal Converter
SD-3 Series
Excerpt Manual
for FM Explosion Proof and Performance
(PT2E-356) rev.2
NOTE
This manual contains excerpts from FM explosion-proof and performance certification related to the SD-3
series.
This manual is only included with FM Explosion Proof and Performance Certified products.
When using this product, please also refer to the Technical Manual for SD-3series (PT2E-287).

Contents
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Contents
1. Product Overview...............................................................................................................................................4
1-1 Introduction ...............................................................................................................................................4
1-2 Intended use and features ........................................................................................................................4
1-3 Usage zones and conditions.....................................................................................................................4
2. Important Safety Information..............................................................................................................................5
2-1 Danger information....................................................................................................................................5
2-2 Warning information..................................................................................................................................5
2-3 Caution information ...................................................................................................................................5
2-4 Safety information .....................................................................................................................................6
3. Product Configuration ..................................................................................................................................... 23
3-1 Main unit and accessories...................................................................................................................... 23
3-1-1 Main unit (SD-3).......................................................................................................................... 23
3-1-2 Main unit (SD-3SC)..................................................................................................................... 23
3-1-3 Remote sensor head (GD-3) ...................................................................................................... 23
3-1-4 Standard accessories ................................................................................................................. 23
3-1-5 Optional accessories................................................................................................................... 24
3-2 Part names and functions ...................................................................................................................... 26
3-3 Block diagrams....................................................................................................................................... 27
4. Installation....................................................................................................................................................... 29
4-1 Installation precautions........................................................................................................................... 29
4-1-1 General installation information................................................................................................... 29
4-1-2 Restrictions regarding installation ............................................................................................... 29
4-2 System design precautions.................................................................................................................... 32
4-3 Providing maintenance space................................................................................................................ 32
4-4 Main unit installation............................................................................................................................... 32
4-5 Remote sensor head (GD-3) installation................................................................................................ 32
4-6 Connecting the grounding terminal ........................................................................................................ 32
4-7 Connecting the power and signal cables ............................................................................................... 32
4-8 Mounting the sensor............................................................................................................................... 32
4-9 Alarm relay setting (option) .................................................................................................................... 32
4-10 Mounting the splash guard................................................................................................................... 32
5. Usage Instructions .......................................................................................................................................... 33
6. Alarm Activation .............................................................................................................................................. 34
6-1 Gas alarm activation .............................................................................................................................. 34
6-1-1 Alarm activation .......................................................................................................................... 34
6-1-2 Contact operation (auto reset) .................................................................................................... 34
6-1-3 Contact operation (self-latching) ................................................................................................. 34
6-1-4 Alarm response........................................................................................................................... 35
6-2 Fault alarm activation ............................................................................................................................. 35
6-3 Warning operation.................................................................................................................................. 36
6-4 External output operation....................................................................................................................... 36
6-5 Functions to ensure correct alarm activation.......................................................................................... 36
6-5-1 Zero suppression function........................................................................................................... 36
6-5-2 Automatic sensor recognition function ........................................................................................ 36
7. Maintenance ................................................................................................................................................... 37
7-1 Maintenance intervals and items............................................................................................................ 37
7-2 Maintenance mode ................................................................................................................................ 40
7-3 Performing tests (test mode).................................................................................................................. 40
7-4 Performing calibration ............................................................................................................................ 41
7-4-1 Calibration preparation................................................................................................................ 41

Contents
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7-4-2 Performing zero calibration ......................................................................................................... 48
7-4-3 Performing span adjustment....................................................................................................... 48
7-5 Setting environmental settings 1 ............................................................................................................ 48
7-6 Setting environmental settings 3 ............................................................................................................ 48
7-7 Parts replacement.................................................................................................................................. 49
7-7-1 Sensor replacement.................................................................................................................... 49
7-7-2 Replacement of periodic replacement parts ............................................................................... 50
8. Storage, Relocation, and Disposal.................................................................................................................. 51
8-1 Procedures for storage or when not in use for extended periods .......................................................... 51
8-2 Procedures for relocation or reuse......................................................................................................... 53
8-3 Product disposal..................................................................................................................................... 53
9. Troubleshooting .............................................................................................................................................. 54
9-1 Product abnormalities ............................................................................................................................ 54
9-2 Reading abnormalities ........................................................................................................................... 55
10. Product Specifications .................................................................................................................................... 56
10-1 SD-3 specifications .............................................................................................................................. 56
10-1-1 SD-3 (model without EC barrier)................................................................................................. 56
10-1-2 SD-3 (model with EC barrier)...................................................................................................... 58
10-1-3 Electrical ratings (SD-3) .............................................................................................................. 58
10-2 SD-3SC + GD-3 specifications............................................................................................................. 59
10-2-1 SD-3SC + GD-3 (model without EC barrier)............................................................................... 59
10-2-2 SD-3SC + GD-3 (model with EC barrier).................................................................................... 61
10-2-3 Electrical ratings (SD-3SC + GD-3) ............................................................................................ 61
10-3 Detection target gases for individual detection principles .................................................................... 62
10-3-1 Non-dispersive infrared absorption type (Infrared type).............................................................. 62
10-3-2 New ceramic type ....................................................................................................................... 62
10-3-3 Semiconductor type .................................................................................................................... 62
10-3-4 Hot-wire semiconductor type ...................................................................................................... 62
10-3-5 Electrochemical type................................................................................................................... 63
11. Appendix......................................................................................................................................................... 64
11-1 Detection principle................................................................................................................................ 64
11-2 Sensor Specifications........................................................................................................................... 65
11-2-1 IR sensor specification ............................................................................................................... 65
11-2-2 Combustible gas sensor specification........................................................................................ 66
11-2-3 EC sensor specification.............................................................................................................. 67
11-3 Calibration curve................................................................................................................................... 68
11-3-1 IRF sensor .................................................................................................................................. 68
11-3-2 NCF sensor................................................................................................................................. 69
11-4 Terminology.......................................................................................................................................... 69
Product warranty............................................................................................................................................. 70
Sensor warranty............................................................................................................................................ 70
Revision History.............................................................................................................................................. 71

1. Product Overview 1-1 Introduction
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1
Product Overview
1-1 Introduction
Thank you for purchasing the SD-3 Gas Detector with Signal Converter (“product” hereinafter).
This operating manual describes product operating procedures and specifications. It provides information
essential to correct use of the product.
Whenmeasuring combustible gases, followthe instructions provided in EN 60079-29-2.
1-2 Intended use and features
Please refer to the Technical Manual for SD-3series (PT2E-287).
1-3 Usage zones and conditions
Please refer to the Technical Manual for SD-3series (PT2E-287).
CAUTION
Poses risk that combustible or explosive gases can be ignited.The product has notbeen tested in
oxygen-enriched atmospheres (>21 %O2).
Using this product in locations associated with explosion risks: Devices and components may be used in
locations associated with explosion risks under the conditions specified by approval obtained under
explosion prevention ordinances in Japan, Europe, or internationally.

2. Important Safety Information 2-1 Danger information
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2
Important Safety
Information
2-1 Danger information
Please refer to the Technical Manual for SD-3series (PT2E-287).
2-2 Warning information
Please refer to the Technical Manual for SD-3series (PT2E-287).
2-3 Caution information
Please refer to the Technical Manual for SD-3series (PT2E-287).

2. Important Safety Information 2-4 Safety information
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2-4 Safety information
<Product overview>
The products have an explosion-proof construction.
Sensors are divided into three different types, depending on the corresponding detection principles. The
detection methods are divided into the diffusion type and suction type. Suction-type sensors should be used
with a suction cap fitted.
The product is a fixed, continuous monitoring detector. It can be connected to a gas monitoring control unit,
recorder, or programmable control unit to output the measured gas readings as a 4 - 20 mA signal or HART
signal.
The following three product output options are available:
・No alarm relay, no digital communication
・3 alarm relays (contact output) (alarm relays operate in conjunction with gas alarms and faults), no
digital signal
・No alarm relay, digital communication (RS-485 output)
<Detection principles and models>
The models corresponding to the individual detection principles are as follows. The models are classified by
detection principle and detection method.
Detection principle (Detection method: Diffusion type)
Model
Optical sensor
Non-dispersive infrared absorption type (infrared type)
SD-3RI
Solid state sensor
New ceramic type
SD-3NC
Electrochemical sensor
Electrochemical type
SD-3EC
SD-3ECS
Detection principle (Detection method: Suction type)
Model
Optical sensor
Non-dispersive infrared absorption type (infrared type)
SD-3DRI
Solid state sensor
New ceramic type
SD-3DNC
Electrochemical sensor
Electrochemical type
SD-3DEC
SD-3DECS
When the SD-3SC is combined with the remote sensor head (GD-3), it forms the following models:
Detection principle (Detection method: Diffusion type)
Model
GD-3
(Remote sensor head)
SD-3
Optical sensor
Non-dispersive infrared absorption
type (infrared type)
GD-3RI
SD-3SC
Solid state sensor
New ceramic type
GD-3NC
Electrochemical sensor
Electrochemical type
GD-3EC
GD-3ECS

2. Important Safety Information 2-4 Safety information
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<Explosion-proof performance data>
The range of ambient temperatures in which explosion-proof performance can be maintained will differ depending
on whether the optional lightning arrester is fitted.
Refer to the following performance data for each model:
【US Certification】
<Without lightning arrester>
Model
Explosion-
proof
construction
Class
Zone
Explosion-
proof class
EPL
Ambient temperature*1
SD-3RI
d
Ⅰ
1
AEx db IIC T6/T5
Gb
-50 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3DRI
GD-3RI
SD-3NC
d
Ⅰ
1
AEx db IIC T5/T4
Gb
-50 °C ≤ Ta ≤ +44 °C/+70 °C
SD-3DNC
GD-3NC
SD-3EC
d
Ⅰ
1
AEx db IIC T4
Gb
-50 °C ≤ Ta ≤ +70 °C
SD-3DEC
GD-3EC
SD-3ECS
d
Ⅰ
1
AEx db IIC T4
Gb
-50 °C ≤ Ta ≤ +70 °C
SD-3DECS
GD-3ECS
SD-3SC*2
d
Ⅰ
1
AEx db IIC T5/T4
Gb
-50 °C ≤ Ta ≤ +44 °C/+70 °C
SD-3SC*3
d
Ⅰ
1
AEx db IIC T6/T5
Gb
-50 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3SC*4
d
Ⅰ
1
AEx db IIC
T6/T5/T4
Gb
-50 °C ≤ Ta ≤+47 °C/
+55 °C/+70 °C
*1 Ambient temperature refers to the temperature range in which the explosion-proof performance is maintained. It
does not refer to the temperature range in which product performance is guaranteed. For information on the
operating temperature range, refer to ‘Detection target gases for individual detection principles’.
*2 When combined with GD-3NC
*3 When combined with GD-3RI
*4 When combined with GD-3EC and GD-3ECS
【US Certification】
<With lightning arrester>
Model
Explosion-
proof
construction
Class
Zone
Explosion-
proof class
EPL
Ambient temperature*1
SD-3RI
d
Ⅰ
1
AEx db IIC T6/T5
Gb
-40 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3DRI
GD-3RI
SD-3NC
d
Ⅰ
1
AEx db IIC T5/T4
Gb
-40 °C ≤ Ta ≤ +44 °C/+70 °C
SD-3DNC
GD-3NC
SD-3EC
d
Ⅰ
1
AEx db IIC T4
Gb
-40 °C ≤ Ta ≤ +70 °C
SD-3DEC
GD-3EC

2. Important Safety Information 2-4 Safety information
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SD-3ECS
d
Ⅰ
1
AEx db IIC T4
Gb
-40 °C ≤ Ta ≤ +70 °C
SD-3DECS
GD-3ECS
SD-3SC*2
d
Ⅰ
1
AEx db IIC T5/T4
Gb
-40 °C ≤ Ta ≤ +44 °C/+70 °C
SD-3SC*3
d
Ⅰ
1
AEx db IIC T6/T5
Gb
-40 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3SC*4
d
Ⅰ
1
AEx db IIC
T6/T5/T4
Gb
-40 °C ≤ Ta ≤+47 °C/
+55 °C/+70 °C
*1 Ambient temperature refers to the temperature range in which the explosion-proof performance is maintained. It
does not refer to the temperature range in which product performance is guaranteed. For information on the
operating temperature range, refer to ‘Detection target gases for individual detection principles’.
*2 When combined with GD-3NC
*3 When combined with GD-3RI
*4 When combined with GD-3EC and GD-3ECS
【Canadian Certification】
<Without lightning arrester>
Model
Explosion-
proof
construction
Explosion-
proof class
EPL
Ambient temperature*1
SD-3RI
d
Ex db IIC T6/T5
Gb
-50 °C ≤Ta ≤+60 °C/+70 °C
SD-3DRI
GD-3RI
SD-3NC
d
Ex db IIC T5/T4
Gb
-50 °C ≤Ta ≤+44 °C/+70 °C
SD-3DNC
GD-3NC
SD-3EC
d
Ex db IIC T4
Gb
-50 °C ≤Ta ≤+70 °C
SD-3DEC
GD-3EC
SD-3ECS
d
Ex db IIC T4
Gb
-50 °C ≤Ta ≤+70 °C
SD-3DECS
GD-3ECS
SD-3SC*2
d
Ex db IIC T5/T4
Gb
-50 °C ≤Ta ≤+44 °C/+70 °C
SD-3SC*3
d
Ex db IIC T6/T5
Gb
-50 °C ≤Ta ≤+60 °C/+70 °C
SD-3SC*4
d
Ex db IIC T6/T5/T4
Gb
-50 °C ≤Ta ≤+47 °C/
+55 °C/+70 °C
*1 Ambient temperature refers to the temperature range in which the explosion-proof performance is maintained. It
does not refer to the temperature range in which product performance is guaranteed. For information on the
operating temperature range, refer to ‘Detection target gases for individual detection principles’.
*2 When combined with GD-3NC
*3 When combined with GD-3RI
*4 When combined with GD-3EC and GD-3ECS

2. Important Safety Information 2-4 Safety information
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【Canadian Certification】
<With lightning arrester>
Model
Explosion-
proof
construction
Explosion-proof class
EPL
Ambient temperature*1
SD-3RI
d
Ex db IIC T6/T5
Gb
-40 °C ≤Ta ≤+60 °C/+70 °C
SD-3DRI
GD-3RI
SD-3NC
d
Ex db IIC T5/T4
Gb
-40 °C ≤Ta ≤+44 °C/+70 °C
SD-3DNC
GD-3NC
SD-3EC
d
Ex db IIC T4
Gb
-40 °C ≤Ta ≤+70 °C
SD-3DEC
GD-3EC
SD-3ECS
d
Ex db IIC T4
Gb
-40 °C ≤Ta ≤+70 °C
SD-3DECS
GD-3ECS
SD-3SC*2
d
Ex db IIC T5/T4
Gb
-40 °C ≤Ta ≤+44 °C/+70 °C
SD-3SC*3
d
Ex db IIC T6/T5
Gb
-40 °C ≤Ta ≤+60 °C/+70 °C
SD-3SC*4
d
Ex db IIC T6/T5/T4
Gb
-40 °C ≤Ta ≤+47 °C/
+55 °C/+70 °C
*1 Ambient temperature refers to the temperature range in which the explosion-proof performance is maintained. It
does not refer to the temperature range in which product performance is guaranteed. For information on the
operating temperature range, refer to ‘Detection target gases for individual detection principles’.
*2 When combined with GD-3NC
*3 When combined with GD-3RI
*4 When combined with GD-3EC and GD-3ECS
【ATEx / IECEx Certification】
EN/IEC 60079-29-1
<Without lightning arrester>
Model
Explosion-
proof
constructio
n
Group
Category
Explosion-proof
class
EPL
Ambient temperature*1
SD-3RI
d
II
2G
Ex db IIC T6/T5
Gb
-50 °C ≤ Ta ≤ +60 °C /+70 °C
SD-3DRI
GD-3RI
SD-3NC
d
II
2G
Ex db IIC T5/T4
Gb
-50 °C ≤ Ta ≤ +44 °C /+70 °C
SD-3DNC
GD-3NC
SD-3EC
d
II
2G
Ex db IIC T4
Gb
-50 °C ≤ Ta ≤ +70 °C
SD-3DEC
GD-3EC
SD-3ECS
d
II
2G
Ex db IIC T4
Gb
-50 °C ≤ Ta ≤ +70 °C
SD-3DECS

2. Important Safety Information 2-4 Safety information
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GD-3ECS
SD-3SC*2
d
II
2G
Ex db IIC T5/T4
Gb
-50 °C ≤ Ta ≤ +44 °C/+70 °C
SD-3SC*3
d
II
2G
Ex db IIC T6/T5
Gb
-50 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3SC*4
d
II
2G
Ex db IIC
T6/T5/T4
Gb
-50 °C ≤ Ta ≤+47 °C/
+55 °C/+70 °C
*1 Ambient temperature refers to the temperature range in which the explosion-proof performance is maintained. It
does not refer to the temperature range in which product performance is guaranteed. For information on the
operating temperature range, refer to ‘Detection target gases for individual detection principles’.
*2 When combined with GD-3NC
*3 When combined with GD-3RI
*4 When combined with GD-3EC and GD-3ECS
【ATEx / IECEx Certification】
EN/IEC 60079-29-1
<With lightning arrester>
Model
Explosion-
proof
construction
Group
Category
Explosion-proof
class
EPL
Ambient temperature*1
SD-3RI
d
II
2G
Ex db IIC T6/T5
Gb
-40 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3DRI
GD-3RI
SD-3NC
d
II
2G
Ex db IIC T5/T4
Gb
-40 °C ≤ Ta ≤ +44 °C /+70 °C
SD-3DNC
GD-3NC
SD-3EC
d
II
2G
Ex db IIC T4
Gb
-40 °C ≤ Ta ≤ +70 °C
SD-3DEC
GD-3EC
SD-3ECS
d
II
2G
Ex db IIC T4
Gb
-40 °C ≤ Ta ≤ +70 °C
SD-3DECS
GD-3ECS
SD-3SC*2
d
II
2G
Ex db IIC T5/T4
Gb
-40 °C ≤ Ta ≤ +44 °C/+70 °C
SD-3SC*3
d
II
2G
Ex db IIC T6/T5
Gb
-40 °C ≤ Ta ≤ +60 °C/+70 °C
SD-3SC*4
d
II
2G
Ex db IIC
T6/T5/T4
Gb
-40 °C ≤ Ta ≤+47 °C/
+55 °C/+70 °C
*1 Ambient temperature refers to the temperature range in which the explosion-proof performance is maintained. It
does not refer to the temperature range in which product performance is guaranteed. For information on the
operating temperature range, refer to ‘Detection target gases for individual detection principles’.
*2 When combined with GD-3NC
*3 When combined with GD-3RI
*4 When combined with GD-3EC and GD-3ECS

2. Important Safety Information 2-4 Safety information
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<Electrical data>
Model
Supply voltage
Power
consumption
Signal output
Option (select one)
No alarm relay/
No digital
communication
Alarm relay
(contact output)/
Resistance load
only
Digital
communication
SD-3RI
24 V DC
(18 V - 30 V
DC Max)
3.8 W Max
0 - 22 mA + HART
―
30 V DC, 1 A
250 V AC, 2 A
RS-485 output
SD-3DRI
GD-3RI
1.2 W Max
―
―
―
―
SD-3NC
24 V DC
(18 V - 30 V
DC Max)
4.5 W Max
0 - 22 mA + HART
―
30 V DC, 1 A
250 V AC, 2 A
RS-485 output
SD-3DNC
GD-3NC
2 W Max
―
―
―
―
SD-3EC
24 V DC
(18 - 30 V DC
Max）
2.8 W Max
0 - 22 mA + HART
―
30 V DC, 1 A
250 V AC, 2 A
RS485 output
SD-3DEC
GD-3EC
1 W Max
―
―
―
―
SD-3ECS
24 V DC
(18 - 30 V DC
Max）
2.8 W Max
0 - 22 mA + HART
―
30 V DC, 1 A
250 V AC, 2 A
RS485 output
SD-3DECS
GD-3ECS
1 W Max
―
―
―
―
SD-3SC
24 V DC
(18 V - 30 V
DC Max)
5 W Max
0 - 22 mA + HART
―
30 V DC, 1 A
250 V AC, 2 A
RS-485 output
<Certificate numbers>
FM22US0043X
FM22CA0030X
FM22ATEX0019X
IECEx FMG 22.0011X
*The “X” at the end of the certificate number indicates the following special operating conditions:
・ The flameproof joints are not intended to be repaired
・Equipment must only be placed in areas with low risk of mechanical danger(according to clause 26.4.2 of
ANSI/UL 60079-0:2019、26.4.2 of CAN/CSA-C22.2 No. 60079-0:2019).
・Avoid rubbing the nameplate area with a dry cloth during use, maintenance, or cleaning. Doing so may
result in a static charge buildup of up to 6 nF.
・Refer to manufacturer’s instructions for ambient temperature.
・If the surge protection device (lightning arrester) is attached to the flameproof enclosure, it shall be
provided with a high strength locking compound on the mounting thread.
・The IP ratings are IP44 for the infra-red sensors and IP67 for the ceramic sensors.(according to
clause ANSI/FM 60079-29-1)
・The IP ratings of electrochemical sensors are IP44 for the ESF-A24R and IP67 for the ESF-A24R3.
・For situations where the detector has been submerged in water, refer to the Safety Information section
of the user manual.
・The GD-3 Series remote gas detectors are only for use with the SD-3SC transmitter.

2. Important Safety Information 2-4 Safety information
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<System configuration diagrams>
Display
Gas detector (SD-3)
Hazardous area
(Zone 1)
Non-hazardous
area
Installation diagram
Signal cable
POW(+)
COM(−)
Sig(+)
Sig(−)
POW(+)
COM(−)
Sig(+)
Sig(−)
RLY
RLY
Display
Gas detector (SD-3)
Hazardous area
(Zone 1)
Non-hazardous
area
Installation diagram
Signal cable
POW(+)
COM(−)
Sig(+)
Sig(−)
POW(+)
COM(−)
Sig(+)
Sig(−)
Signal cable

2. Important Safety Information 2-4 Safety information
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RS-485
Display
Gas detector (SD-3 (RS-485))
Hazardous area
(Zone 1)
Non-hazardous
area
Installation diagram
Signal cable
POW(+)
COM(−)
Sig(+)
Sig(−)
POW(+)
COM(−)
Sig(+)
Sig(−)
Signal cable
RS-485
Display
Gas detector (SD-3SC)
Hazardous area
(Zone 1)
Non-hazardous
area
Installation diagram
Signal cable
POW(+)
COM(−)
Sig(+)
Sig(−)
POW(+)
COM(−)
Sig(+)
Sig(−)
Signal
cable
POW(+)
COM(−)
RS-485(Y)
RS-485(Z)
POW(+)
COM(−)
RS-485(Y)
RS-485(Z)
Remote sensor head
(GD-3)

2. Important Safety Information 2-4 Safety information
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RLY
RLY
Display
Gas detector (SD-3SC)
Hazardous area
(Zone 1)
Non-hazardous
area
Installation
diagram
Signal cable
POW(+)
COM(−)
Sig(+)
Sig(−)
POW(+)
COM(−)
Sig(+)
Sig(−)
Signal cable
Signal
cable
POW(+)
COM(−)
RS-485(Y)
RS-485(Z)
POW(+)
COM(−)
RS-485(Y)
RS-485(Z)
Remote sensor head
(GD-3)
RS-485
RS-485
Display
Gas detector (SD-3SC)
Hazardous area
(Zone 1)
Non-hazardous
area
Installation diagram
Signal cable
POW(+)
COM(−)
Sig(+)
Sig(−)
POW(+)
COM(−)
Sig(+)
Sig(−)
Signal cable
Signal
cable
POW(+)
COM(−)
RS-485(Y)
RS-485(Z)
POW(+)
COM(−)
RS-485(Y)
RS-485(Z)
Remote sensor head
(GD-3)

2. Important Safety Information 2-4 Safety information
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CAUTION
Install the product in accordance with the required installation conditions.
Do not disassemble, modify, or alter the product.
Contact Riken Keiki to request readjustment or parts replacement including calibration.
Use cable lugs for grounding wire and bonding conductor connections. Make sure the bonding
conductors are not loose or twisted.
Do not open the cover in locations where explosive gas may be present.
The maximum pressure inside the gas channels and sensor is 10.13 kPa (gauge pressure).
Be sure to connect the grounding terminal before turning on the power to the product.
Make sure the grounding is Class D equivalent (grounding resistance less than 100 Ω).
Use crimped terminals to connect the grounding wire to the grounding terminal inside the unit. Use a
cable with a cross section area of at least 4 mm2 to connect to the external grounding terminal.
Use approved cable glands when installing.
If the product is installed in a location where the ambient temperature exceeds 65 °C, use cables
designed for use at temperatures at least 5 °C above the maximum ambient temperature.
Do not subject the window in the cover to strong forces or impact. Doing so may result in damage and
impaired explosion-proof performance. (The low risk of mechanical hazards has been confirmed in
testing [2 joules].)
Do not use more than one adapter per connector.
CAUTION
With suction type
Use with a flow rate of at least 0.4 L/min and not exceeding 1.5 L/min.

2. Important Safety Information 2-4 Safety information
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Putting into service
Type and size of screw at external entry of SD-3.
Entry1
Entry2
Entry3
Entry4
Entry5
Entry6
M25×1.5
〇
〇
✕
〇
〇
〇
NPT1/2-14
〇
〇
〇
〇
✕
✕
NPT3/4-14
〇
〇
✕
〇
✕
✕
No hole
✕
✕
〇
〇
〇
✕
〇：Correspondence is possible
✕：Correspondence is impossible
The above table shows type and size of screw at external entry of SD-3.Each of our component and
sensor assembly can be connected to Entry 1 to Entry6.
The following table shows the connectable components of each entry. When connecting each component,
the body needs to have screw holes suitable for each component.Entry1, Entry2, Entry4, Entry6 can be also
be cable entry. Entry 6 is used to connect GD-3. When connecting GD-3, use a certified cable gland. The
number of entry for external cable that can be used simultaneously is two (Excluding entry 6) .Use only
certified components for entry 1 to entry 6. For entry 2 or for entry 4, can use a certified surge protection
device. Entry 3 can use a certified wireless HART adapter. Unused opening entries must be closed off with
plugs.
Entry3
Entry2
Entry1
Entry6
Entry5
Entry4

2. Important Safety Information 2-4 Safety information
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Entry1
Entry2
Entry3
Entry4
Entry5
Entry6
Sensor Assembly
✕
✕
✕
✕
✕
〇
EC Barrier
✕
✕
✕
✕
✕
〇
Certified cable gland
〇
〇
✕
〇
✕
〇
M25 Plug
〇
〇
✕
〇
〇
〇
NPT1/2 Plug
〇
〇
〇
〇
✕
✕
Conversion adapter
(M25⇔NPT1/2)
〇
〇
✕
〇
✕
〇
Conversion adapter
(M25⇔NPT3/4)
〇
〇
✕
〇
✕
〇
Conversion adapter
(M25⇔M20)
〇
〇
✕
〇
✕
〇
Surge protection device
✕
〇
〇
〇
✕
✕
Wireless HART adapter
✕
✕
〇
✕
✕
✕
〇：Connectable
✕：Unconnectable
Tighten 30 Nꞏm or larger torque value to ensure the tightening M25 Plug and Conversion adapter.
Tighten 10 Nꞏm or larger torque value to ensure the tightening NPT1/2 Plug.
The thread engagement should be 5 or more.

2. Important Safety Information 2-4 Safety information
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External entry of GD-3.
Combination table of external entry
Entry1
Entry2
Entry3
Sensor Assembly
✕
✕
〇
EC Barrier
✕
✕
〇
Certified cable gland
〇
〇
✕
M25 Plug
〇
〇
〇
NPT1/2 Plug
〇
〇
〇
Conversion adapter
(M25⇔NPT1/2)
〇
〇
〇
Conversion adapter
(M25⇔NPT3/4)
〇
〇
〇
Conversion adapter
(M25⇔M20)
〇
〇
〇
〇：Connectable
✕：Unconnectable
Tighten 30 Nꞏm or larger torque value to ensure the tightening M25 Plug and Conversion adapter.
Tighten 10 Nꞏm or larger torque value to ensure the tightening NPT1/2 Plug.
The thread engagement should be 5 or more.
Entry3
Entry2
Entry1

2. Important Safety Information 2-4 Safety information
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No
COMPONENT
CERTIFICATES
RATINGS
manufacturer
name/
code
protection
number&edition
standards
voltage,
current,
temperature
1
Eaton Electric
Limited
TP48andTP32Series
SurgeProtection
Devices
II2 GEx
dbIICT6
Gb
IECExBAS
15.0056X
Issue1
Baseefa 04
ATEX0053X
EN60079-
0:2012+A11:2013
EN60079-1:2014
IEC60079-0:2011
Edition:6.0
IEC60079-1:2014
Edition:7.0
-40ºC
to+70ºC
48VDC
NPT ½”
2
Pepperl+Fuchs
GmbH
WHA-BLT-F9D0-N-A0-
Z1-1
II2 GEx
dbIIC
T6...T5
Gb
IECExFMG
17.0020X
Issue0
FM17ATEX
0046X
EN60079-
0:2012+A11:2013,
EN60079-1:2014
IEC60079-0:2011
Edition:6.0
IEC60079-1:2014
Edition:7.0
T6：-40°C
to75°C,
T5：-40°C
to85°C
7～32V
DC
NPT ½”
・Inthecaseofusing SurgeProtectionDevices,thelowerlimitofambienttemperatureofSD-3orGD-3is-40℃.
・In the case of using WHA-BLT-F9D0-N-A0-Z1-1(WirelessHARTAdaptor),thelowerlimitofambienttemperatureofSD-3orGD-3
is-40℃.

2. Important Safety Information 2-4 Safety information
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<Connection examples>
GD-3RI
GD-3ECB
SD-3SC
SD-3SC