17
Selectronic Australia
Rev 41 - Dec 2022
Installation
Expansion Card Warning – 120VDC Model
SPMC1201 – SPLC1200 – SPLC1202 Models
Hazardous Voltage – 120V Battery
The Expansion Card connects to both hazardous and Safety Extra Low Voltage
(SELV) wiring. The connector and wiring to J4 (marked with
RED
on card)
must
be
treated as hazardous and be physically segregated from other wiring connected
to the Expansion Card.
Protective cover (provided)
must
be installed on the Expansion Card.
Current Shunt Wiring
SPMC1201 – SPLC1200 – SPLC1202 Models – Hazardous Voltage – 120V Battery
Current shunt connections are both internally and externally connected to the battery negative
terminal and
must
be treated as hazardous. Double insulated sense cabling
must
be used.
DC shunts
must
be installed into the battery negative lead. Ensure that the shunt only measures
the renewable or other DC Load current and not any current feeding to or from the inverter.
See
DC Coupled Charge Controller Preparation
diagram on page 25.
The sense wires for the external shunts should be fed through the appropriate gland and terminated to the
SP PRO Expansion Card. The sense cabling should be kept as short as possible. Any multi-conductor multi-
strand cable is suitable for shunt sense wiring, as long as the insulation is rated appropriately for the battery
voltage. Remember that these small cables are connected to battery negative, and an inadvertent short circuit
with either lead to battery positive will short circuit the battery bank. It is recommended that both these wires
be fused.
The polarity of these shunt sense leads is not important if they are configured to either Load or any of the
input selections, such as solar; however, polarity is important when using the shunt in dual mode – that is,
where the shunt is used for both input and output measurement to obtain a net result.
In dual mode, the sense leads must be connected correctly – Expansion Card shunt terminal 1A or 2A to the
solar and Load side, 1B or 2B to the battery negative side.
For more information, see
TN0045 – SP PRO Shunt Installation
Battery Temperature Sensor
SPMC1201 – SPLC1200 – SPLC1202 Models – Hazardous Voltage – 120V Battery
The battery temperature sensor is internally connected to the battery negative terminal and
must
be
treated as hazardous. The sensor cable is double insulated.
The battery temperature sensor is not required when installing managed batteries, but can remain
inside the SP PRO. The battery temperature is read by the battery BMS and sent to the SP PRO via
the communications link.
The battery temperature sensor is pre-wired to the Expansion Card. For accurate charging it must be installed
in thermal contact with the centre of a side of a battery and insulated away from external temperature effects.
If the cable provided is not long enough, it may be extended up to 10m with at least 0.5mm
2
cable. Polarity of
the cable is not important.
A small piece of foam, cut from the inverter’s packing material, can be used to both wedge the temperature
sensor in place and insulate it from external temperature effects (see insert below).
Cabling and Fusing
