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General
Site check
A site inspection allows a quick check of the
operation of the RCU. After opening the
door, the panel LEDs will come on. Normal
operation will display:
Power source on (unless it is dark and
the power source is solar)
Battery OK
Switchgear OK
Remote control on
CPU OK flashing
Protocol RX data and TX data flashing
occasionally when the SCADA system
polls the RCU. For some protocols, such
as DNP3, which may not have frequent
polling of the RCU, it may be possible to
force unsolicited messages to the SCADA
system by turning the remote control
switch off and on again. The protocol
LEDs can be observed and voice
communication with the SCADA
operator will confirm receipt of the data.
Hazardous voltages and high-speed moving parts.
Will cause death, serious injury and property damage.
Do not work on energized equipment. Always de-energize and ground the
lines before working on the equipment.
De-energize and isolate auxiliary power supply at the source before
removing power supply cover, and install power supply cover before
energizing auxiliary power to the RCU.
Spare parts
Spare parts must only be replaced by
qualified personnel.
Accessory/spare part
Battery 12 V, 7.2 Ah lead acid
Solar panel kit 65 W
Fusesaver operator panel
Battery replacement
The RCU monitors the battery to determine
when replacement is required as described
on page 65. If the battery is detected as
being near end of its life, the replace battery
indicator on the front panel is lit and the
replace battery database point will be set.
When the battery is replaced it must be of
the same type. The battery is a sealed lead-
acid battery preferably conforming to the
battery standard JISC8702. Battery
specification is in Battery life section on
page 65, and the Siemens part number is
listed above for re-ordering.
To replace a battery the action is:
1. Turn off the battery switch, check that
the battery LED lights on the display
panel go out. The auxiliary power supply
or solar switches can be left on and the
RCU will still be operating.
Table 6: Spare parts
Order number
3AX1350-6A
3AX1350-6B
3AX1350-8C
57
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