Extron MLC Plus 84 handleiding
Handleiding
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MLC Plus 84 Series • Hardware Features and Installation 24
E
Digital input port — Connect a switch, sensor, LED, relay contact, or similar item to
this port (see figure 18,
E
on page18) , which can be configured with or without
+5VDC pull-up. The port can
activate events or functions (such as
triggering relays, issuing commands,
or sending an e-mail) that have been
configured using Global Configurator.
To allow the controller to monitor
external devices, connect a switch,
motion sensor, moisture sensor, tally
feedback output, button pad, or a
similar item to a digital input port and
configure the port. The port is set to
measure two states: high and low.
The port accepts 0 to 24VDC input.
Threshold voltages are not
adjustable. The thresholds are as
follows:
• 2.0VDC — port on, logic low
• 2.8VDC — port off, logic high
There is also an internal, selectable, pull-up resistor connected to +5VDC, which you
can use if the connected device does not provide its own power. The port is capable of
accepting 250mA, maximum.
• 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, digital input without pull-up: occupancy sensor
connection:
Control
Signal
Ground
+5.0 V
1k ohms
SW 2
SW 1
Digital
I/O
GND
Voltage
Protection
CTL
Occupancy
Sensor
Figure 25. Digital I/O Digital Input Application:
Occupancy Sensor, Without Pull-up
Room occupied: logic high.
Room unoccupied: logic low.
NOTE: Occupancy sensors typically supply +24VDC when occupancy is
detected. After a set time with no occupancy, the sensor supplies 0VDC.
1
2
C
G
C
V
V
OL
GIN
D IN
R
ELAY
S
Digital Input
Congure the port with or without
+5 VDC pull-up.
Use this port to:
• Monitor or trigger events and
functions (toggle relays, issue
commands, send e-mail), once
congured.
• Power an LED or other device
that accepts a TTL signal.
Rear
Pa
nel
Switch, Sensor, LED,
Relay, or Similar Item)
Figure 24. Digital Input Port Wiring
4/2017, rev. C:
Removed incandescent light
from what you can power from
the digital input port.
Rev. D, 09/2018: Added
example applications
and diagrams for
digital input.
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Productinformatie
| Merk | Extron |
| Model | MLC Plus 84 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 9928 MB |
