RKI Instruments TAN-5000 Series - Manual (Page 14)

4 How to Use 4-3. Precautions for system designing
TAN-5000 - 14 -
Do not install the buzzer unit in a place where maintenance of the buzzer unit cannot be performed or
where handling the buzzer unit involves dangers.
Regular maintenance of the buzzer unit must be performed.
Do not install the buzzer unit in a place where the machinery must be stopped when maintenance is
performed in its inside, where parts of the machinery must be removed to perform maintenance, or where
the buzzer unit cannot be removed because tubes or racks prevent access to it. Do not install the buzzer
unit in a place where maintenance involves dangers, for example, near a high-voltage cable.
Do not install the buzzer unit in machinery which is not properly grounded.
Before installing the buzzer unit in machinery, the machinery must be grounded properly.
Do not install the buzzer unit in a place where other gases exist around it.
The buzzer unit must not be installed in a place where other gases exist around it.
4-3. Precautions for system designing
Using a stable power supply
The external output and alarm contact of the buzzer unit may be activated when the power is turned on,
when momentary blackout occurs, or when the system is being stabilized. In such cases, use a UPS
(uninterrupted power supply), or take appropriate actions on the receiving side.
The buzzer unit must be provided with the following power supply.
Power supply
voltage
24 VDC (21.6 – 26.4 VDC) (Terminal voltage of the buzzer unit)
Allowed time of
momentary blackout
Up to 10 milliseconds
(To recover from the momentary
blackout for 10 milliseconds or more,
restart the buzzer unit.) Example of actions
To ensure continuous operation and
activation, install a protective power
supply outside the buzzer unit.
Others
Do not use it with a power supply of
large power load or high-frequency
noise. Example of actions
Use a line filter to avoid the noise source
if necessary.
Heat radiation designing
When it is installed in the closed instrumentation board, attach ventilation fans above and below the board.
CAUTION
An unstable power supply and noise may cause malfunctions or false alarms.
The descriptions in this section must be reflected on the designing of a system using the buzzer
unit.