Siemens SIMATIC ET 200S - Block Diagram of the 2 AI I 2;4 WIRE High Feature

Analog Electronic Modules
12-72
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Table 12-43 Terminal assignment of the 2AI I 2/4WIRE High Feature, continued
View RemarksTerminal assignment
M
1--
M
0--
2
3
4
6
7
8
15
M
1+
M
0+
TM-E15S26-01 and 2AI I 2/4WIRE High Feature
(Alternative terminal assignment for
2WIRE)
+24 V DC+24 V DC
2-wire
CH0 CH1
mA
-- 2 4 V D C-- 2 4 V D C
2-wire measuring transducer
AUX1
A
4
A
3
A
8
A
7
AUX1
AUX1
AUX1
Channel 0: Terminals 1 to A3
Channel 1: Terminals 5 to A7
M+ : input signal ”--”
M-- : connect to -- 24 VDC
+ 24 VDC: Input signal ”+”
The 2-wire transducers are
powered over the
measurement leads.
A mixture of 2-wire and 4-wire
transducers is allowable.
An external power supply for
one of the transducers must be
used to ensure isolation
between the channels.
Block diagram
ADC
M
ANA
24V
L+
1M
1
2
5
6
7
3
8
4
P1
P2
MUX
Backplane bus
ET 200S
backplane bus
interface
connection
Current
limiting
Figure 12-14 Block diagram of the 2AI I 2/4WIRE High Feature