Smart Positioner
YT-3700 / 3750
Product Manual
Ver. 1.03
35
5.2.3
Terminals with proximity Limit Switch option
The input and output terminals of products equipped with proximity limit switch switches can be
connected to an external system as shown below. Refer to the table below for the signal name and
function of each terminal.
Fig. 5-4: Proximity Sensor Switch Terminal
Terminal
name
Signal name
Function
1, LS-1
Common terminal for Limit Switch 1
Common contact terminal for Limit Switch 1
2, LS-1
Normal open signal for Limit Switch 1
The contact of the Limit Switch 1 is closed when
the valve passes through the preset position.
3, LS-1
No connection
Not used
1, LS-2
Common terminal for Limit Switch 2
Common contact terminal for Limit Switch 2
2, LS-2
Normal close signal for Limit Switch 2
The contact of the Limit Switch 1 opens when
the valve passes through the preset position.
3, LS-2
No connection
Not used
5.3
Ground
1. Ground must be done before operating the positioner.
2. Open base cover and there is an internal ground
“F.G” on the left hand.
An external ground bolt is located next to the conduit entry. Please make sure that the resistance
is less than 100 ohm.
