Nov.
-11 100/240 VAC power supply
Do not remove the mains power supply terminal strip when the remote terminal unit is
powered up (mains or battery).
Position: no. 0 (the leftmost)
Properties
Mains board: 100/240 VAC - 40/70 Hz. - max 0.5 A.
12 V lead battery charger (maximum load current: 500 mA).
Capacity for power supply to boards and devices (cf. § Consumption).
- Rated capacity: 1.4 A.
- "Peak" capacity without battery: 2 A.
- "Peak" capacity with battery: 4 A.
Battery power supply management (functions optimized for 10 to 27 Ah batteries):
- Overload test: automatic cut-off in the event of a short circuit.
- Polarity reversal detection and protection.
- Detection of battery voltage inferior to 11.2 V.
- Battery presence test.
- Battery capacity test.
- Protection against complete discharges (threshold at 10.2 V).
These tests are retrieved via the "Battery fault" information. These are performed each day on a 2-
hourly basis; the battery capacity test is performed on the 15th of each month at 8:30am.
Power cut-off device
A remote terminal unit power supply circuit breaker must be installed in the enclosure.
Backup battery
First use: When connecting the new battery, the Remote Terminal Unit must remain connected to the
power supply for at least 24 hours.
Mains outage: in the event of an outage of the main energy source, the power supply to the Remote
Terminal Unit is backed up by this 12 V lead-acid battery (27 Ah maximum).
Minimum voltage: to prevent deep discharge of the battery, the Remote Terminal Unit is no longer
powered if the battery voltage is under 10.2 V.
When the Remote Terminal Unit’s mains power supply is deliberately cut off for long periods of time
(typically for 48 hours or more), we strongly recommend disconnecting the battery.
Case of a 12 V solar panel power supply
A 12 V direct current source can be connected to the "Battery (B-, B+)" input terminal strip, on condition that
nothing is connected to the "Mains" input terminal strip.
In this operating mode, the Remote Terminal Unit is not shielded from possible overvoltages.
We recommend the use of SunSaver controllers:
please contact our sales engineering department
for help in selecting the correct type of controller
(6, 10 or 20) and in defining the size of the solar
panel according to your facility’s geographical
situation.
Please comply with the installation recommendations
Battery stated in the instructions provided with the controller:
jumper fit vertically, establish connections by increasing terminal
strip number (1 to 6) as shown on the diagram opposite
(battery, solar panel, then finally the Remote Terminal
Unit), position of the jumper for a wet battery, etc.
Fuse
Ground 10A - 125mW
In that case, data "Battery Fault" is not managed by the remote terminal unit.
Doc_02-02-100/240VAC
Nov.-11 100/240 VAC power supply
Connecting the power supply
An appropriate differential isolator should be positioned upstream of the instrument.
Terminal strips for
the 100/240VAC board FAST-ON lug
V+ EXTERNAL devices or
SunSaver charge controller for
solar panel power supply
Battery
External battery
(attachment required)
MAINS
Neutral - Phase
Mains protection
Mains
EARTH
For further information, see the “Surge Protectors” §.
Power supply for an external GSM modem
As the consumption peaks of an external GSM modem are significant, a 12V battery
must be connected to the remote terminal unit's power supply.
Diagnostics
The graphical display allows control of the remote terminal unit's power supply status:
100-240 VAC
signal not detected
RTU supply fault :
Battery fault : signal detected
Battery test :
Click with the control thumbwheel
to perform a "Battery test".
Doc_02-02-100/240VAC
