Riken Keiki 70D Series Instructions for use

PT2E-1670
Gas Detector
70D Series Ethernet Model
System Construction Manual
RIKEN KEIKI Co., Ltd.
2-7-6 Azusawa Itabashi-Ku, Tokyo, 174-8744, Japan
Website: http://www.rikenkeiki.co.jp/

Contents
1. Introduction
1-1. Procedures for laying Ethernet communication line ........................................................................ 2
2. Important safety information
2-1. DANGER, WARNING, CAUTION, and NOTE................................................................................. 3
2-2. Warnings ......................................................................................................................................... 3
3. Ethernet communication line configuration and specifications
3-1. Overview of communication line configurations............................................................................... 4
4. Model selection
4-1. Device and cable selection.............................................................................................................. 5
5. System construction
5-1. Important information on design and cabling................................................................................... 6
5-2. LAN cable termination ..................................................................................................................... 8
5-3. Gas detector installation and wiring................................................................................................. 9
6. Testing and measurement
6-1. Measurement and testing after cabling.......................................................................................... 16
6-2. Communication test for entire network .......................................................................................... 16
7. Maintenance
7-1. Maintenance intervals and inspection items .................................................................................. 17
7-2. Securing spare parts for emergency response .............................................................................. 17
Appendices......................................................................................................................... 18
Appendix 1. Checklist for configuration design ........................................................................................ 19
Appendix 2. System construction checklist.............................................................................................. 19
Appendix 3. Communication failure checklist .......................................................................................... 20
Appendix 4. List of measuring instruments and tools .............................................................................. 21
Appendix 5. Description of terms............................................................................................................. 22

3
2. Important safety information
2-1. DANGER, WARNING, CAUTION, and NOTE
！
DANGER The DANGER sign indicates that improper handling of the product may result
in death, severe injury, or serious property damage.
！
WARNING The WARNING sign indicates that improper handling of the product may
result in severe injury or serious property damage.
！
CAUTION The CAUTION sign indicates that improper handling of the product may
result in minor injury or minor property damage.
＊
NOTE The NOTE sign indicates recommendations for product handling.
2-2. Warnings
！
WARNING
Power source
Before turning on power for the product, be sure to confirm that the power source meets the specified
voltage requirements. Avoid using unstable power sources; doing so may lead to malfunctions.
Protective grounding required
Do not cut the protective grounding line of the product or disconnect the protective grounding
terminal.
Defects involving protective functions
Before operating the product, check the protective functions for defects. Do not operate the product if
you find potential defects in protective functions, including protective grounding.
External connections
Be sure to provide secure protective grounding before connecting the product to the detection target
or external control circuit.

5
4. Model selection
4-1. Device and cable selection
PoE HUB (if the system selected is PoE)
Item Description
Power source PoE power supply (PoE standard-compliant)
PoE: IEEE 802.3af (1 port, MAX. 15.4 W)
PoE+: IEEE 802.3at (1 port, MAX. 30 W)
Power supply capacity
＊ NOTE
Depending on the model, due to product specifications, even if the
supply capacity per port is sufficient, connecting all ports at the
same time may result in inadequate maximum supply capacity.
Select a model capable of providing the capacity needed or restrict
the number of connected detectors.
[Reference]
Number of connected gas detectors x 8 W (MAX.) ≦Total
power supply capacity
Power consumption per gas detector = 6 W to 8 W
The specifics will differ depending on the sensor unit. Refer to
the separate specification sheet for more information.
HUB (PoE/Ethernet common specifications)
Item Description
Power cable loosening
prevention
Model incorporating features to keep the power cable from coming
off the HUB main body
(Cable loosening prevention fitting)
LAN cable
Item Description
Cable used UTP (Unshielded twisted pair) cable
＊ NOTE
If you select an STP (shielded twisted pair) cable, the shield will
not be grounded unless the connected device (HUB) also
supports STP. If this requirement is not met, problems with noise
will be even more pronounced. For this reason, we recommend
using a UTP cable.
Standard Category 5 or 5e
Supported medium 100BASE-TX or better
Cable specifications Solid wire cable (up to 5 m for stranded wire cable)
Modular plug RJ-45
Number of cores 8
Wire connection Straight-through connection

17
7. Maintenance
The communication line plays a significant role in this system with respect to disaster prevention and
security.
To maintain performance and improve reliability for disaster prevention and security, regular
maintenance is recommended.
7-1. Maintenance intervals and inspection items
Item Description
Inspecting the LAN cable
installation state
The cable must be free from abnormal forces (whether
due to tension or heavy objects).
The cable coating must be free of scratches that affect
function.
Inspecting the LAN cable
connection
The connector must be free of damage.
7-2. Securing spare parts for emergency response
This gas detector is connected via a communication device (HUB).
It will be subjected frequently to LAN connections and disconnections and similar procedures. If it
breaks down due to the damage caused by system construction work, the results for the host system
will be significant. To minimize the effects of a failure, we recommend stocking spare parts.
Recommended spare parts
PoE HUB : If using the PoE system.
HUB : If using the system with normal HUB communications and separate power supply.

18
Appendices
The appendices provide lists of check items, tools, and measuring instruments for design and
construction.
The lists have been compiled to help you check the validity and prevent problems caused by system
construction. Use them effectively.

19
Appendix 1. Checklist for configuration design
Listed below are check items before construction:
No. Item Judgment criteria Judgment/result
1 Power supply
capacity in PoE HUB
The power supply capacity is sufficient even if the
maximum number of gas detectors are connected
to the ports or the number of connected detectors
is restricted by design.
OK/NG
2 LAN cable
Anti-noise measures
The cable route is isolated from noise sources. OK/NG
3 RJ-45
Modular plug
selection
Plugs for stranded wire are not used for solid wire
cables.
Plugs for solid wire and stranded wire are not used
together.
OK/NG
4 LAN cable selection UTP Category 5 or Category 5e OK/NG
5 LAN cable length 80 m or less OK/NG
Appendix 2. System construction checklist
Listed below are the check items after construction.
No. Item Judgment criteria Judgment/result
1 LAN cable
Tension
The cable is not pulled tightly but is laid loosely. OK/NG
2 LAN cable
Bending
The bending radius is 25 mm or more. OK/NG
3 LAN cable
Binding
The cable is not bound tightly by cable ties, etc. OK/NG
4 LAN cable
Long distance parallel
cabling
The cables are not laid completely in parallel over
extended distances.
OK/NG
5 LAN cable
Isolation from noise
sources
The cable is isolated in racks dedicated for
communication or by separators.
OK/NG
The cable is kept away from noise sources.
[Reference]
From transformers and motors: 120 cm or more
From AC power cables: 30 cm or more
From fluorescent lamps: 13 cm or more
OK/NG
6 LAN cable
Treatment of excess
lengths of cable
When an excess length of cable is rolled in circles,
the diameters of the circles are varied.
OK/NG
7 LAN cable
Unwound portion
On termination, the length unwound is 12.7 mm or
less.
OK/NG
8 LAN cable
Test
Straight-through connection OK/NG
No wire breaks or short circuits OK/NG
Each cable is 80 m or less. OK/NG
9 LAN cable
Marking
Both ends are marked.
Example: Gas detector tag number
OK/NG
10 LAN cable
Securing
The cables are secured so that they will not come
loose even if subjected to a sudden force.
OK/NG
11 Grounding The gas detector case is grounded.
(Equivalent to Class D grounding)
OK/NG