QSI QS-2plus!, Manual

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Section 6 RESET Feature Guide 56
Note: When you arm and fire both couplers, the available electrical power to
operate the couplers is split between the front and rear couplers. You may not
have sufficient power to open the knuckles against the drag of a long train.
What Is a Trailing Coupler and How Is It Used?
The trailing coupler is either the front or rear coupler, depending on the
direction the engine was traveling. For example, the trailing coupler on an
engine that was going forward, and is now in neutral, is the rear coupler. The
trailing coupler on an engine that was going in reverse, and is now in neutral,
is the front coupler. (The rear coupler is at the back of an engine. On steam
engines the rear coupler is on the tender, and on most diesels it is at the hood
end of the body. The front coupler is at the nose of an engine. On diesels the
front coupler is at the cab end, and on steam engines it is at the boiler end.)
With Trailing Arm Enabled, engine direction determines which coupler will
work. You do not have to return to this RESET Feature to change between front
and rear couplers.
For example, let's say you want to arm and fire the rear coupler on your engine.
Run the engine in
forward, stop, and put the engine in neutral. When you arm
the coupler, only the rear coupler will accept the command and only the rear
coupler will fire.
Now run the engine in reverse, stop, and put the engine in neutral. Now the
trailing coupler is the front coupler. When you arm the coupler, only the front
coupler will accept the command and only the front coupler will fire.
There are advantages to being able to choose the coupler you want without
going back to RESET. With most engines, rear couplers are used the most, but
some engines change between using front and rear couplers frequently. For
example, switchers use both couplers and you want to choose between the front
and rear couplers quickly and easily.
ding, ding…
Press horn button to enable or disable coupler