MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 55)

Model 505.60 HPU Setup
Model 505.60 - 505.180 SilentFlo™ HPU Installation 55
C. If you are controlling the HPU with an external device connected to the
14-pin MS connector, select the polarity of the remote interlock signals
from the HPU to the controller.
Press the Remote Logic button to select: Remote Logic Normal
(active high) or Remote Logic Reverse (active low).
D. If a watchdog timer is present, press the Watchdog button to display
Watchdog Present.
If a watchdog timer is not present, press the Watchdog button to
display Watchdog Not Present.
E. Determine if the optional pressure filter is installed.
If the pressure filter is present, press the Pressure Filter button to
display Pressure Filter Present.
If the pressure filter is not present, press the Pressure Filter button to
display Pressure Filter Not Present.
Note Skip Step F if you do not have a device that requires the auxiliary
contacts.