Control Ports — Touchpanel
Digital Input Monitoring Port
This port monitors digital input from external devices. Connect as follows:
1
G
INPU
T
Ground
Control Signal
Figure 6.
Digital Input Monitoring Port
•
Pin 1 = signal
•
Pin 2 (G) = ground.
The port measures two states: high and low. Digital input is triggered by an external switch or
voltage between the digital input pin and ground. The threshold voltages are:
•
Low to high 2.8 VDC
•
High to low 2.0 VDC
If the connected device does not provide its own power, use Global Configurator to configure an
internal pull‑up resistor.
Digital Input Port Use-cases
Connecting an Occupancy Sensor to the Digital Input Port
Digital I/O digital input with pull‑up disabled:
Digital input is triggered by an external switch or voltage between the digital input pin and
ground.
Example application: occupancy sensor connection:
Control
Signal
Ground
+5.0 V
1k ohm
SW 2
Digital
Input
GND
Voltage
Protection
CTL
Occupancy
Sensor
Figure 7.
Connecting an Occupancy Sensor to the Digital Input Port
•
Room Occupied
— Digital input reads +2.8 to 24 VDC = Logic High
•
Room Unoccupied
— Digital Input reads 0 VDC = Logic Low
NOTE:
An occupancy sensor typically su24 VDC when occupancy is detected. After
a defined period when no occupancy is detected, the sensor supplies 0 VDC.
TLC Pro 526M, 726M, and 1026M Series TouchLink Pro Control Systems • Panel Features
12
