Siemens SIMATIC ET 200S Manual page 454

Analog Electronic Modules
Table 13-42 Terminal assignment of the 2AI I 2/4WIRE High Feature, continued
View
TM-E15S26-A1 and 2AI I 2/4WIRE High Feature
CH0
M
0+
1 5
M
0–
2 6
24 VDC+
3 7
24 VDC–
4 8
A A
AUX1
4 8
A A
AUX1
3 7
Block diagram
ET 200S
backplane bus
interface
module
P1
P2
Figure 13-13 Block diagram of the 2AI I 2/4WIRE High Feature
13-70
Terminal assignment
(Alternative terminal assignment for
2WIRE)
2 conductors
CH1
Two-wire measuring transducer
M
1+
M
1–
24 VDC+
24 VDC–
AUX1
AUX1
24 V
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"+"
Two-wire measuring
mA
transducers are supplied by
means of the measuring
circuits.
Mixing two-wire and four-wire
measuring transducers is
permitted.
To support isolation between
the channels, use an external
supply to feed one of the
measuring transducers.
MUX
ADC
M
ANA
Current limit
Remarks
1
2
5
6
3
7
4
8
ET 200S Distributed I/O System
EWA-4NEB780602402-09