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Nitrogen
P/N 6-129021-01
1. Switch contacts shown in
NC
dynamic 175 psi line
NO
pressure condition.
COM
2. Circuit No. 1: Set for open
contacts 0-140 psi, closed
COM
above 140 psi.
3. Circuit No. 2: Set for
NO
closed contacts 190 psi,
NC
open above 190 psi.
Oxygen
P/N 6-129020-01
1. Switch contacts shown in
NC
dynamic 50 psi line
NO
pressure condition.
COM
2. Circuit No. 1: Set for open
contacts 0-40 psi, closed
COM
above 40 psi.
3. Circuit No. 2: Set for
NO
closed contacts 0-60 psi,
NC
open above 60 psi.
Vacuum
P/N 6-129022-01
1. Switch contacts shown in
NC
dynamic 20 in Hg vacuum
NO
condition.
COM
2. Circuit No. 1: Set for open
contacts 0-12 in Hg
vacuum, closed for vacuum
levels above 12 in Hg.
BLUE
RED
NITROGEN
PURPLE
LINE PRESSURE LOW
BROWN
NITROGEN
YELLOW
LINE PRESSURE HIGH
ORANGE
BLUE
RED
OXYGEN LINE PRESSURE LOW
PURPLE
BROWN
OXYGEN LINE PRESSURE HIGH
YELLOW
ORANGE
RED
BLUE
VACUUM LINE LOW
PURPLE
Schematic 9. Pressure/Vacuum Switches to Multi-Signal Alarm Module
Ten-wire ribbon
cable to adjacent
module
PANEL
BUSS
CABLE
Sixteen-wire ribbon cable to multi-
signal alarm module chassis
8
COM
+
1
4
ALARM
5
7
+
COM
2
S
F1
EXT
6
COM
NC
3
W
SIGNAL
3
I
RELAY
5
+
COM
4
T
RATING
2A 30V
4
COM
C
NO
5
DC/AC
2
H
3
+
+
6
6
INPUTS
2
COM
COM
7
1
+
1
EARTH GROUND
8
TERMINAL BLOCK 1
TERMINAL BLOCK 2
8
1
1
8
PANEL
P-B ASSY
BUSS
231955
HEADER
MULTI-SIGNAL MODULE
INTERCONNECT CABLE
J3
J1
J2
Multi-Signal
Alarm Module
GREEN
SYSTEM NORMAL
CORRECTIVE ACTION REQUIRED
RED
OXYGEN LINE
PRESSURE HIGH
OXYGEN LINE
PRESSURE LOW
NITROGEN LINE
PRESSURE HIGH
NITROGEN LINE
PRESSURE LOW
VACUUM
LINE LOW
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