Installation
25
Connecting the contact input terminal
The applicable electric wire is of 0.14 mm
2
to 2.5 mm
2
(AWG26 to AWG14).
For the cable for contact input, use a twist pair shielded wire.
If lightning might strike, install an arrester along the signal line.
Tip
EXT1: External command input for automatic zero calibration (refer to “ Setting of automatic zero
calibration start method ” (page 41)).
EXT2: External command input for the automatic cleaner (refer to “ Cleaning operation type
setting ” (page 46)).
EXT3, EXT4: Range switchover command input for transmission output 2 from a maximum of
four ranges. Cancels the automatic range changeover for transmission output 2 and activates
manual switching (Specifically, refer to “ Transmission output 2 range (fixed/automatic
changeover) setting ” (page 44)).
Note
The contact input impedance should be within 100
.
When contact input 1 is short-circuited, the EXT1 indicator in the display area lights up.
Contact input 1 to 4 Open-
circuit voltage 24 V DC
short-circuit current 12 mA
maximum
EXT3
EXT4
Range changeover for
transmission output 2
0
0
Cur2.A
1
0
Cur2.b
0
1
Cur2.c
1
1
Cur2.d
1: closed 0: opened
