RKI Instruments GD-K7D2 (24 VDC) - Manual (Page 10)

6 • Model GD-K7D2 (24 VDC) Sample Draw Transmitter
Socket
A card edge connector socket on the back of the bracket mates with the main circuit board
on the detection unit.
External Wiring Terminal Strip
A seven point terminal strip is located below the socket and used for wiring the GD-K7D2
to a controller.
A jumper is normally factory installed between the second and third terminals from the
right. This jumper is installed when the GD-K7D2 is used with a controller that does not
have a flow alarm circuit and flow alarm terminals for wiring to the GD-K7D2. It is not
installed when the GD-K7D2 is used with a controller that has flow alarm circuitry and
flow alarm terminals. See Wiring the GD-K7D2 to a Controller in the Installation section
for both types of wiring.
Cable Bushing
The 1/2 in. (1.25 cm) cable bushing on the bottom of the bracket allows you to route
wiring from a controller to the seven point external wiring terminal strip on the back of
the bracket.
Gas In & Gas Out Sample Fittings
There are two tube fittings on the bottom of the bracket, the gas in and gas out sample
fittings. The gas in fitting is forward of the gas out fitting. The gas in fitting allows sample
to enter the GD-K7D2 and the gas out fitting is for exhausting the sample. Both fittings
accept 6 mm O.D. x 4 mm I.D. Teflon PTFE tubing.