Chapter 2: Description • 11
Cylinder Connections (Side Panels)
Four gas fittings are located on the left side of the SDM-3R. Three are for gas cylinders and one is for
the particle filter or a zero air cylinder. The left to right order is: GAS 3, GAS 2, GAS 1, AIR. All four
fittings accept 3/16 inch ID tubing. The number of active gas fittings depends on how many solenoid
valves are installed in your docking station. The AIR and GAS 1 fittings are always active. The GAS 2
and GAS 3 fittings are only active if the docking station was ordered with 2 or 3 solenoid valves,
respectively.
The right side of the SDM-3R is shipped from the factory with a small panel attached to it with two
screws. That panel should remain in place if the SDM-3R is being used alone or if it is the right-most
station in a bank of connected stations. The panel needs to be removed in order to connect another
SDM-3R to it. Beneath the panel are plugged fitting connections that mate to the stubs on the left side
of another SDM-3R.
Figure 3: Cylinder Connections
G
A
S
1
G
A
S
2
G
A
S
3
A
IR
Left Side
Right Side, Panel
and Plugs Removed
