DRC-4720
Bridge Input Signal Conditioner
INSTRUCTION
SHEET
M4739/0109
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Description:
The DRC-4720 is a DIN Rail mount, self-contained DC
powered module designed for load cell, strain gage, or
single ended use. The DRC-4720 contains a precision
instrumentation amplifier, filtered output and a built-
in 10V excitation supply capable of driving a 350 ohm
bridge. The 0 to 30mV input range makes it compatible
with most strain gage based load cell or pressure
transducer outputs. The DRC-4720 provides an output of
4 to 20mA. Connections are made via easily accessible
screw clamp terminal blocks. Zero and Span adjustment
potentiometers are located externally as well for easy
access.
Amplifier
Gain
Input for a 20mA Output
10mV to 30mV
Linearity: 4 to 20mA Out
±0.01
Temperature Coefficient
0.05% / ºC
Input Offset Voltage
Temperature Coefficient
±70μV
0.7μV / ºC
Common Mode Voltage
0 to +5 Volts
Common Mode Rejection - DC
100 dB
Input Noise
0.1Hz to 10Hz
0.3μV pp Typ
Output
Output Range
4 to 20mA
Compliance Voltage
5.5V Max
Loop Resistance
250Ω Max
Frequency Response
2 Pole Filter
DC to 10Hz
Total RMS Gain
Temperature Coefficient
0.007% / ºC
Bridge Supply
Fixed Output
+10V ±1.5%
Temperature Coefficient
0.05% / ºC
Load Current
30mA Max
Power Requirements
Voltage
18 to 26 Volts
Input Current (1 - 350 Ohm Bridge)
55 mA
Environment
Operating Temperature
0ºC to +55ºC
Storage Temperature
-40ºC to +80ºC
Size
Size
(Not including Universal Foot for
standard DIN EN Rails)
1.65”H x 1.06”W x 3.78”L
(42 x 27 x 96mm)
Weight
3 oz. (85g)
Agency Approval
UL, CE
UL508, UL1604, CE
Pending
Features:
Low Cost
Din Rail Mount
Load Cell or Single Ended Application
4-20mA
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