[GreenKeys] Hal ST-6 terminal unit question

[Reggie Moody]

Have a Hal ST-6 terminal unit with molex connectors on the backside.  I'm a bit 
confused.  The only manual I have is the one that shows RCA and 1/4 inch plugs 
for the printer, along with other FSK and etc. It's my understanding this is the 
manual for an earlier ST-6.  


The "loop" connector on my unit is labeled Loop 1 and Loop 2. Pins on the right 
side of the connector reads 1, 2, 3 and the left side (loop 2) reads 4, 5, 6.

Question. Which of these pins do I tap for the loop current? Question may be 
elementary, but I'm learning.

Thanks