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4.2 Terminal description
Terminal diagram
Mark
Description
L
AC85V~AC220V L
N
AC85V~AC220V N
24V
24V Power supply positive pole
0V
24V Power supply 0V
P+
Pulse output positive pole
P-
Pulse output negative pole
I+
Current output positive pole
I-
Current output negative pole
485+/A
RS485 communication interface A
485-/B
RS485 communication interface B
ALARM1
Alarm output 1
ALARM2
Alarm output 2
Sensor terminal
PT20/PT300 is
Default combination
，
Other optional sensors
PT20/PT200
、
PT20/PT1000
、
RS232 interface, baud rate is 9600.
Function1 the same with S485 interface
Function2 is used to upgrade the instrument program
Upgrade button, press the button, the RS232 interface for
function two, at this time the instrument is not displayed in
the upgrade ready!
Under normal circumstances, no need to press the button.
