Overview

Two USAutomatic Patriot Control boards can be wired together so that when one gate is open, the other gate is forced to remain closed. This is done with a few wires between the J2 terminal and the Security Shunt terminal block on each board. In this article you will learn how to make these connections.

The Security Shunt contacts on each board close as soon as that board’s operator receives a command, and they stay closed until the gate returns to the closed limit. Each board’s Security Shunt is wired to the other board’s Close input, so while one gate is open or moving, the other board sees a constant close command. Because the wiring is the same in both directions, either gate can lock out the other.

Applies to Part Number(s)

1. 500018
   

What You Need

1. Flat head screw driver
2. A total of 5 wires to connect each control board
   
1. 3 wires are ran between the two operators, these need to be long
2. The remaining 2 are used as jumpers  at each board, these can be short

Procedure

Identifying the Terminals

The J2 terminal is the row of green terminals along the bottom of the board. The pins are numbered 1–12 from left to right. The Security Shunt is the blue 3-terminal block in the lower right corner of the board, labeled N/C, C and N/O from left to right.

This procedure uses the following J2 pins:

The J2 terminal and the Security Shunt terminal block on a Patriot Control board.

Enabling the Security Shunt

On each board, enable the DS2 switch labeled Gate in Motion. The Security Shunt will not activate without it.

Making the Connections

Label the boards Board 1 and Board 2. The following connections need to be made:

1. Power off both control boards. This is recommended but not required.
   
2. Pull the J2 terminal block off of each board so the wires can be installed.
3. Run a wire from J2 pin 7 on Board 1 to J2 pin 7 on Board 2.
4. Run a wire from J2 pin 5 on Board 1 to the N/O Security Shunt on Board 2.
5. Run a wire from J2 pin 5 on Board 2 to the N/O Security Shunt on Board 1.
6. On each board, run a jumper wire from J2 pin 7 to the C Security Shunt terminal.
7. Check that every wire is fully seated and tight in its terminal, and that no bare wire strands touch neighboring terminals.
8. Plug the J2 terminal block back into each board and restore power if it was removed.
   

The wire colors chosen do not matter. 

Two Patriot Control boards with the interlock connections made.

Testing the Interlock

1. Open Gate 1 and confirm that Gate 2 will not open while Gate 1 is open.
2. Close Gate 1, then open Gate 2 and confirm that Gate 1 will not open while Gate 2 is open.
   

The interlock stays active from the moment a gate receives an open command until that gate has returned to the closed limit.