aPbox Installation and Operations Manual
23
The two paralleled DO+ terminals and the two paralleled DO- terminals are connected to
the aGate DO terminals (without polarity distinction), as shown in the following figure.
NOTE
•
The length of the communications cables between the aPbox and aGate
X should not exceed 328 feet (100 meters)
•
Use twisted pair cables for RS485 conductors.
•
The DO- DO+ terminals of the two aPbox's should be connected in
parallel. Make sure that they are not interchanged with one another.
•
When two units are connected to an aGate X, use 20AWG cables for
DO- and DO+ conductors.