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11. MULTIDROP CONFIGURATION
In the disabled state (E=0), the multiplexer outputs no current and exhibits a high
Z state. This mode allows the connection of several DRA-RTM-8 units to one PLC's
analog input, by tying their output terminals and the address lines in parallel, and
applying individual Enable lines to select the desired multiplexer by disabling all
but one (see fig 7).
12. SPECIFICATIONS
ANALOG INPUTS:
RTD INPUT:
Zero adjustability:
Span adjustability:
Lead Compensation Error:
Max Lead Resistance:
Pt-100 linearization:
CURRENT INPUT
Max Input Current:
Reverse Polarity Protection:
Output Accuracy (Refer to Current Input):
CONTROL INPUTS:
Logic:
Logic Levels:
OUTPUT:
SWITCHING TIME:
INDICATORS:
SUPPLY VOLTAGE:
SUPPLY CURRENT CONSUMPTION:
FUSE:
TEMPERATURE STABILITY:
OPERATING TEMPERATURE:
STORAGE TEMPERATURE:
HUMIDITY:
HOUSING:
Box:
Terminal:
WEIGHT:
DIMENSIONS:
8
a
8, Pt-100 Channels
=0.00385
8, 0/4-20mA Channels
o
50 to +200
C
o
50 to 750
C
o
0.025
C for 10
lead resistance
W
120
two ways
W
0.1% of span max.
30 mA
Yes
0.1% of span max.
4 Address
1 Enable input
True High or True Low (User selectable)
Low: "0" < 0.5V High: 5 < "1" < 60V
4-20mA, Current Loop
< 20mSec (into a resistive load)
1 Yellow LED, Power-On indicator
8 Red LEDs, current activity indicators
24 10% Vdc (regulated)
120 mA 10mA
150 mA, Fast Blow (5x20mm)
o
0.01% of span/1
C
o
o
0 to 60
C (32 to 140
F)
o
-25 to +85
C (-13 to 185
5 to 95% Relative humidity, non-condensing
Plastic Polycarbonate
According to IP50 DIN 40050
According to IP20 DIN 40050
0.9 Kg. (2.0 lb.)
73Hx200Wx121mmD (2.88"x7.88"x4.76")
ANALOG +
ANALOG -
PLC
ANALOG
INPUT
MODULE
ENABLE 1
ENABLE 2
MSB
DISCRETE
OUTPUT
LSB
MODULE
Figure 7.
o
F)
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