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MPT-90 PRODUCT MANUAL
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CAUTION
DO NOT CONNECT TO VOLTAGES HIGHER THAN
28 VDC WITHOUT RECONFIGURING.
The positioner is powered by 24-28 VDC, although it may be reconfigured for 28-48
VDC. It is highly recommended that you fuse the + power supply. Verify correct
polarity before applying power. The power of the system is isolated from chassis.
Pin #
Signal
Description
45 & 52
System Power
+ (Positive)
Pins 45 & 52 supply positive (+) power to the P&T positioner, as well as
controlled payload power features and heaters. Due to the size of the
contacts, two pins are necessary; connect together external to the
positioner. Power should be between 24 to 28 VDC, and we recommend
an external 15A fuse.
50 & 51
System Power
– (Negative)
Pins 50 & 51 connect return (-) power from the P&T positioner, as well as
controlled payload power and heaters. Due to the size of the contacts, two
pins are necessary; connect together external of the positioner. Power
should be between 24 to 28 VDC. Note this is insulated from chassis
ground, but may be connected to chassis ground external to the positioner
if desired.
53
Chassis GND
Chassis Ground – isolated from power
