Analog Electronic Modules
12-56
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Block diagram
Backplane bus
ET 200S
backplane bus
interface
connection
ADC
M
ANA
24V
L+
1M
1
2
5
6
7
3
Current
limiting
P1
P2
MUX
Figure 12-10 Block diagram of the 2AI I 2WIRE Standard
Technical data
Dimensions and weight
Dimensions W x H x D
(mm)
15 x 81 x 52
Weight Approx. 40 g
Module-specific data
Supports clock synchro-
nized mode
No
Number of inputs 2
Cable length
•
shielded max. 200 m (164 ft)
Voltages, currents, electrical potentials
Rated load voltage L+ (from
power module)
24 VDC
•
Polarity reversal
protection
Yes
Transducer power supply Yes
•
Short-circuit protection Yes (destruction limit
35 mA per channel)
Electrical isolation
•
Between channels and
backplane bus
Yes
•
Between channels and
load voltage L+
No
•
Between the channels No
Isolation tested 500 VDC
Current consumption
•
with load voltage L+ max . 8 0 mA
Power loss of the module Typical 0.6 W
Status, interrupts, diagnostics
Diagnostic functions
•
Group error red LED ”SF”
•
Reading of diagnostics
functions
Yes
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