AM-215A Series
RS-
485 User’s Manual
1.
Overview
This manual explains the specifications of the communication functions provided by the AM -215A series of digital
panelmeters. It also explains how to handle the AM -215A series.
2.
Specifications
3.
Terminal Assignments and Connection Method
3.1.
Terminal Assignments
User’s Manual AM-215A Series RS-485
1/8
UX-34109f
2017.02
Synchronization
:
Communication method
:
Transmission rate
:
Number of start bits
:
Data length
:
Error detection
:
Number of stop bits
:
Character code
:
Transmission control procedure
:
Signal name used
:
Number of units that can be connected
:
Transmission line length
:
Delimiter
:
Parity bit
:
Start-stop
Two-wire half-duplex (polling/selecting)
2400, 4800, 9600, 19200, 38400 bps
1bit
7bits, 8bits
Even parity, odd parity, or no parity
Block check character (BCC) checksum
1bit, 2bits
ASCII
CR+LF, CR
Non-procedural
Non-inverting (+), inverting (-)
31 for meters
500 m max. (overall length)
*In EN conformity, it is under 30m.
+24V
10
0V
11
12
13
14
15
16
17
18
1
2
3
4
5
6
7
8
9
COM
a
c
a
c
a
c
OUT3
OUT2
OUT1
+V
0V
POWER
HI
LO
+
-
DZ
TERMINATOR
RS485
INPUT
EXC
POWER
!
(c)
(e)
(c)
(e)
(c)
(e)
Note: A terminator will be set to being turned on if No. 5 and No. 6 are short-circuited.
WATANABE ELECTRIC INDUSTRY CO., LTD.
