Pdm Block Diagram - Polaris Ranger 500 2x4 2007 Service Manual

ELECTRICAL
Differential Solenoid
The differential solenoid driver provides a current-regulated
low-side drive for the solenoid coil. The low side driver sinks
current from the inductive load that is sourced internally via the
ACCESSORY POWER output. To activate the solenoid driver,
the DIFF IN input and the BRAKE SWITCH must be high.
Once enabled, the driver provides an initial "pull-in" current for
a pre-determined time and then lowers to a "hold" current until
the DIFF IN input or the BRAKE SWITCH goes low. The
positive side of the differential solenoid is current limited via
ACCESSORY POWER. The solenoid driver provides shut
down to shorts to battery.

PDM Block Diagram

10.20
Hub Coil Drive
The hub safety interlock control (HSI) prevents the HUB COIL
- output from activating if the stator coil input frequency is too
high. Once the frequency is below the set limit, the HUB COIL
- output is allowed to sink current. Once the hub coil is activated
it will remain engaged until current is removed from HUB COIL
+. Engine speed is measured via the stator coil input frequency.
This provides the coil with short circuit, overload and reverse
polarity protection. AWD terminal is available for the high-side
power input to the hub coil. The hub coil must be connected
between the HUB COIL + and HUB COIL -. The hub coil drive
circuit provides no current limit or short circuit protection
Reverse Polarity Protection
The reverse polarity protection circuit is in series with the
battery positive input of the PDM. When the battery terminals
are connected in reverse, the protection switch is forced off,
interrupting any current flow other than bias current.