14 ATR 421 - User manual
9
10
AO1
V/mA
Analogue output in Volt con gurable as command
(Par. c. oUT) or retransmission of process-setpoint
(Par. rEtR.).
To use analogue output in Volt enter JP3 as
indicated in the gure.
Serial input (ATR421-12ABC-T)
19
20
RS485
Shield/Schermo
Communication RS485 ModbusRTU with galvanic
isolation.
5 Display and keys functions
ATR421
C 1
C 2
A 1
A 2
A 3
MAN TUN REM
PRGM
START
STOP
OK
C 1
C 2
A 1
A 2
A 3
MAN TUN REM
3
4
6
5
78910
12
15
16
13
14
11
12