INSTALLATION | Cabling and fusing
Doc #OI0003 Part #004122 Rev19 2014
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Expansion Card Warning - 120VDC model
SPMC1201, SPLC1200 and SPLC1202 models - Hazardous Voltage - 120 V Battery
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
expansion card.
Protective cover MUST be installed on the Expansion card.
Current Shunt Wiring
SPMC1201, SPLC1200 and SPLC1202 models - Hazardous Voltage - 120 V Battery
Current shunts connections are both internally and externally connected to 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.
The sense wires for the externals shunts should be fed up through the appropriate gland and terminated to
the SP PRO expansion card. The sense cabling should be kept as short as possible. “CAT5” type cabling
or any multi conductor multi strand cable is suitable for shunt sense wiring. Remember that these small
cables are connected to battery negative and an inadvertent short circuit with either lead to battery positive
would 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 nett 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 please see “TN0045_03 SP PRO Shunt Installation” document available on the USB
stick provided with this product or from www.selectronic.com.au
Battery Temperature Sensor
SPMC1201, SPLC1200 and SPLC1202 models - Hazardous Voltage - 120 V Battery
Battery temperature sensor is internally connected to battery negative terminal and MUST be
treated as Hazardous. Sensor cable is double insulated.
The battery temperature sensor is pre-wired to the expansion card and must be installed in thermal contact
with the centre of a side of a battery and insulated from external temperature effects for accurate charging.
If the cable provided is not long enough it may be extended. Polarity of the cable is not important.
A small piece of the foam cut from the inverter’s packing material (or similar packing foam) can be used to
both wedge the temperature sensor in place and insulate it from external temperature effects (see insert
below).
