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3
Installation and Operation Manual
Main control board connections
Vapor-logic
3
main control board connections
J1 Wire terminal supplies 24 VAC to power the Vapor-logic
3
control board.
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J2 RJ-11 female modular jack connection for supply voltage
and FTT-10A communication to keypad/display
J3 RJ-45 female modular jack connection for FTT-10A
communication
J4 Wire terminal connection for FTT-10A communication
to LonTalk network. Terminals A and B provide the
communication lines. The last terminal is earth ground for
twisted pair wire shield.
J5 End-of-line communication terminator pins
J6 ¼" (6.4 mm) push-on connector for earth ground
J7 0 to 15 VDC analog output, typically connected to the
input of a steam or hot water valve and 0 to 10 VDC digital
output to solid state control (SSR). Terminal 34 is the
positive output signal and terminal 35 is common.
J8 Connector receives necessary continuity input signals from
water detection devices:
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– Terminal 30 detects maximum water level from top
probe rod and brown or black plug wire.
– Terminal 31 detects water level at refill point from
middle probe rod and orange or white plug wire.
– Terminal 32 detects water level at its lowest point from
lower probe rod and purple or red plug wire.
– Terminal 33 is the common return path for all water
detection rods from the humidifier tank machine
ground back to Vapor-logic
3
control.
t %*30XBUFSMFWFMGMPBUWBMWFTZTUFN
– Terminals 30 and 31 are not used.
– Terminal 32 is connected to the humidifier tank low
water float switch (normally open).
– Terminal 33 receives the return signal from the float
switch to Vapor-logic
3
control via machine ground.
J9 Not used
J10 Ribbon cable connector for Vapor-logic
3
expansion
modules
VL3_IOM.pdf 16 11/19/2009 9:11:06 AM
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