TEXIO LSG-1050H, Instruction Manual

Page: 150 / 205

140
4-1-8. Turning the Load On using External Control
Description The load can be turned on and off with an external switch
connected to pins 7 and 12 of the J1 connector.
Pin Inputs Pin 7 of the J1 connector is internally pulled up to 5V with a
10kΩ resistor when the switch is open. Thus when the switch
is open, pin 7 is logically high. When the switch is closed, pin
7 is pulled down to the A COM ground level, making pin 7
logically low.
Connection
LSG-H
Switch
Analog
connector
12
7
+5V
A COM
10k
Ω
Pin7
→
Ext-Load On(+)
Pin12
→
A COM
Example The Load On In setting determines whether the load is
turned on when the external switch is closed (low) or open
(high).
High
Low
High
Low
LoadOn In = High
Load
On
Off
Load on
Load off
LoadOn In = Low
Operation:
Configuration
Press
Main
> Configure [F5] > Next Menu [F4] > External
[F3] in order, and set the LoadOn IN setting.
Set to Low if you want the load to be turned on when the
switch is closed. Set to High if you want the load to turn on
when the switch is open.
Note
When external control is used to turn the load off, the load
key cannot be used to turn the load on. However the reverse
is not true. If the load has been turned on by external control,
the load key can be used to turn the load off.