3 How to Connect Wire
3-3. Protective grounding
- 14 -
3-3. Protective grounding
For stable operation of the gas monitor and safety, it must be connected to a grounding terminal. The
grounding wire should be thick and short as much as possible to minimize grounding resistance. Use the
EARTH terminal (terminal 3) of the terminal plate to ground the gas monitor.
CAUTION
Be careful not to damage the internal electronic circuit when wiring.
CAUTION
The "b" contact (break contact) under de-energized state may be opened momentarily by a physical
shock, such as external force.
When the "b" contact is selected for the alarm contact, take appropriate actions to prepare for a
momentary activation, for example, add signal delay operation (approximately one second) to the
receiving side of the "b" contact.
WARNING
The grounding must be made as D type grounding (below 100
Ω
of grounding resistance).
Do not connect the grounding wire to a gas tube.
