2
OVERVIEW
SPCi MAXI SERIES GEN II
The second generation interVOLT SPCi Maxi series isolated power conditioners are the evolution
of the original and renowned SPCi models fi rst released in 2003. The GEN II Series is not just a
cosmetic ‘makeover’ but rather a complete new product from the ground up. The all new design
features complete digital control with a specifi cation second-to-none. Here are just a few of the
new features and benefi ts exclusive to the new range:
– Unique operator interface for control and monitoring
– Galvanically isolated input to output – no common connectivity
– Handy charge mode for charging a 24V auxiliary battery (2 stage)
– High resolution voltage output of less than 0.5% under any load
– Peak effi ciency of 92% (better than 90% under most load conditions)
– Remote operator control to turn unit on/off with signal current only
– Multifunction alarm output for fault and pre-emptive warnings
– Temperature and speed controlled internal cooling fan (Vapo bearing)
– Compact design and can be mounted vertically or horizontally
– Heavy duty termination with separate, removable terminal cover
– 24 months warranty (subject to specifi c terms and conditions)
– High quality assembly featuring marine grade hardware
– Conformally coated printed circuit board assembly (tropicalisation)
This manual contains comprehensive information on the installation, set-up and use of the all
new SPCi isolated power conditioners and is applicable to GEN II models only. Whilst every care
has been taken in the preparation of this manual, Amelec Australia Pty Ltd offers no guarantee,
express or implied, and accepts no liability for any inaccuracies, errors or omissions in its
content. Specifi cations are subject to change without notice.
4
INSTALLATION
WIRING
IMPORTANT! Ensure adequately rated cables are used for the maximum load of the SPCi model
installed. If uncertain, consult your cable supplier quoting the continuous rating of the SPCi and the
length of cable on both input and output. The input current draw is approximately 110% of the output
load (subject to V in and V out references). Under-sizing the cable will result in poor performance,
over-heating, a reduction in longevity and may jeopardise your warranty in the event of a failure.
Disconnect the 24VDC supply at the source before attempting any connection to the input terminals
of the SPCi or equipment to the output.
Install an appropriately rated circuit breaker or fuse (see chart below) as the input protection for the
24VDC supply cable to the SPCi.
EXTERNAL INPUT FUSE REQUIREMENT CHART
SPCi Model No. SPCi Rating Input Fuse
SPCi242410G2 10 Amps cont. 20 Amps
SPCi242420G2 20 Amps cont. 40 Amps
Connect all input wiring to the SPCi ensuring correct polarity. Failure to observe correct polarity will
result in the internal protection circuit blowing the fuse. This circuit protects the SPCi from catastrophic
damage. The internal fuse is not user serviceable. In the event the SPCi is incorrectly reverse polarity
connected, the unit must be returned to vendor for servicing.
The power terminals utilise M5 combination head screws for excellent conductivity. It is recommended
that proper tinned drawn-copper cable lugs are used for termination. An example of this item is
depicted on page 6.
3
NOTICE!
The SPCi must be properly installed in order to comply with environmental operating considerations and
the manufacturer’s warranty terms and conditions.
The SPCi is constructed from marine grade materials and the printed circuit board has been conformally
coated (tropicalised) to protect the SPCi from condensation and humidity. It is NOT however, waterproof.
LOCATION
Select a suitable location where the SPCi can be mounted. Ensure there is adequate ventilation and
that the location is free from excessive moisture, dust, vibration and heat. The SPCi is designed for
installation in a protected environment.
ORIENTATION
The SPCi can be mounted vertically or horizontally. The SPCi should be installed on a hard fl at surface –
do not install on an upholstered or insulated surface. Ensure at least 50mm of clearance all around from
other equipment. There should be no restrictions in the way of the ventilated end cap.
MOUNTING
The SPCi unit should be installed with appropriate fasteners ensuring all anchor holes are utilised. The
mounting hole diameter is 5mm and it is recommended that a fastener with a diameter (major thread) of
no less than 3.5mm be used. Do not overtighten.
WIRING
In order to ensure safety, good performance and long life the SPCi should be wired according to the
method detailed overleaf. Please refer pages 11-15 for schematics of the various wiring circuits available.
INSTALLATION
5
INSTALLATION
Once the input supply is terminated the SPCi can be powered up. Upon reconnecting the 24VDC supply
the POWER indicator is illuminated intermittently (pulsing green) indicating the SPCi is operational.
If any other icon is illuminated or the POWER indicator is not illuminated, refer to the troubleshooting
guide on pages 24-25.
The SPCi is now in standby and operating at the factory default output of 26.0VDC. The output can now be
adjusted in one of two ways depending upon the application:
i. For use as a power conditioner – output voltage is selectable between 24.0V and 28.0V in 1V
increments. Please refer to the set-up instructions on pages 7-8 before connecting the output wiring
to the 24V equipment.
ii. For use as a battery charger – output voltage is set to battery charging mode (standard lead acid
battery only). Please refer to the set-up instructions on pages 7-8 before connecting the output wiring
to the 24V battery.
Before connecting the output wiring, ensure the input supply is isolated. Once the output is connected the
SPCi can again be powered up and is now ready for operation.
In addition to the main power terminals there is an auxiliary terminal block located between the input
and output terminals. See over for further information on wiring the auxiliary terminal block.
NOTE: It is also possible to wire the SPCi’s in parallel to increase the output current rating. For example,
two 20A rated units can be paralleled for a combined total of 40 Amps continuous, three for 60 Amps, etc.
The wiring must be appropriately rated to carry the total load and the output voltage setting of each unit
MUST be the same i.e. 26.0V. The SPCi’s can ONLY be paralleled when used as power conditioners and
NOT when used in battery charging mode. Please refer to pages 11-13 for schematics.
