Pin B: No connection / GROUND. If upgrading from an SM-5 system, your A-L plug may have
GROUND on this pin of the plug. It is acceptable to leave GROUND connected here if you’re
using the same connector on an upgrade.
Pin C: Yellow Pump Stroke Sensor Input (NPN). This is an opto-isolated input from a pump
stroke sensor (limit switch, pressure switch, flow meter, etc). The SC-12 Core Hub is looking for
a grounding (NPN) signal from the sensor.
Pin D: White Pump Stroke Sensor Input (NPN). This is an opto-isolated input from a pump
stroke sensor (limit switch, pressure switch, flow meter, etc). The SC-12 Core Hub is looking for
a grounding (NPN) signal from the sensor.
Pin E: Ground Output for Sensors (NPN). The SC-12 Core Hub is providing GROUND for
sensors to use.
Pin F: Power Output (+5V) for Sensors. This is a clean, regulated +5V to use with unregulated
sensors. Note that this connection is rated to 350mA.
Pin G: Motion Sensor Input (NPN). This is an opto-isolated input from a motion sensor (5th
wheel encoder, hall effect sensor, etc). The SC-12 Core Hub is looking for a grounding (NPN)
signal from the sensor.
Pin H: Extra Opto-Isolated Input (NPN). Connection is for vehicles with more than two pump
stroke sensors. If less than or only two pump stroke sensors, this Pin has no connection. The
SC-12 Core Hub is looking for a grounding (NPN) signal from the sensor.
Pin I: Extra Opto-Isolated Input (NPN). Connection is for vehicles with more than two pump
stroke sensors. If less than or only two pump stroke sensors, this Pin has no connection. The
SC-12 Core Hub is looking for a grounding (NPN) signal from the sensor.
Pin J: No connection / GROUND.
Pin K: Extra Opto-Isolated Input (PNP). This connection is reserved for unique +12V (PNP)
signals.
Pin L: Transmission Reverse Input (PNP). This connection is looking for an active +12V (PNP)
signal from the vehicle to indicate the transmission is in reverse. This connection is optional,
but features such as Auto-Reverse Carriage Lift and CVO-312/DL-12 Backup Camera will not
function without a connection