Block Diagram Of The 2Ai I 2/4Wire High Feature - Siemens SIMATIC ET 200S Manual

Analog Electronic Modules
Table 12-43 Terminal assignment of the 2AI I 2/4WIRE High Feature, continued
View
TM-E15S26-01 and 2AI I 2/4WIRE High Feature
CH0
M
0+
1 5
M
0--
2 6
+24 V DC
3 7
--24 V DC
4 8
A A
AUX1
4 8
A A
AUX1
3 7
Block diagram
ET 200S
backplane bus
interface
connection
P1
P2
Figure 12-14 Block diagram of the 2AI I 2/4WIRE High Feature
12-72
Terminal assignment
(Alternative terminal assignment for
2WIRE)
2-wire
CH1
2-wire measuring transducer
M
1+
M
1--
+24 V DC
--24 V DC
AUX1
AUX1
24V
L+
1M
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
mA
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.
MUX
ADC
M
ANA
Current
limiting
Remarks
1
2
5
6
3
7
4
8
ET 200S Distributed I/O System
EWA-4NEB 780602402-12