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