Chore-Time Chore-Tronics 3 Control, Installation & Operator'S Instruction Manual, Page: 99 / 142

Chore-Tronics® 3 Control Control Installation
MT2398C
99
Relative Humidity Sensor(RH) Wiring
The optional Relative Humidity Sensor (Item 1, Figure 25) requires a three-conductor wire to connect
the sensor to the Chore-Tronics
®
3 I/O board. The Sensor is connected to one of the Analog (AI) Inputs
on the IO board.
Note:
Terminal #1 on the relative humidity sensor is connected to the +24 v terminal on the IO board (see
diagram). This is the same +24 v terminal used by the Static Pressure Sensor. Terminal #2 on the Relative
Humidity Sensor is connected to the Analog Input (AI) terminal of the analog Input being used
(See
Figure 25) . Terminal #3 is connected to the ground terminal of the Analog Input (AI) being used. Make
sure that the Blue Jumper above the Analog Input that the RH sensor is connected to is set to "U".
AI10
24V
AI11
Item Description
1 Relative Humidity Sensor Quick Connect
2 I/O Board Analog Input (AI) Terminal of
your Choice
Figure 25. Relative Humidity Sensor Wiring
2
1
U R I
Blue Jumper in the "U" position
Potentiometer Wiring (Natural Ventilation only)
If natural ventilation is being used, the
Potentiometer(s)
To Potentiometer
Blue Jumper set to
the "R" position
U R I
Figure 26. Potentiometer Wiring
AI10
24V AI11
that are attached to
either the main curtain machine(s)
(Internal Potentiometer), or the main
curtain cables (External Potentiometer)
need to be wired to the Chore-Tronics
®
3 I/O Board. The Potentiometers need
to be connected using the same Twisted
Pair Wire that is used for the
Temperature Sensors and follows the
same wiring rules. Each Potentiometer
needs to be wired to one of the Analog
Input (AI) Terminals on the IO board.
Make sure that whichever AI Input the
Potentiometer is connected to that the
Blue Jumper above the Input is set to
"R"
(See Figure 26) . To connect the
sensor wire to the Potentiometer itself,
please see Chore-Time instruction
manual MV1251 for internal
Potentiometer wiring, or MV1566 for
external Potentiometer wiring.