CF 52A
1
Mar 2014
DCM 495 USER’S GUIDE
Chapter 1 - Introduction
1.1 General
The Cooper DCM 495 is a universal in-line amplifier that can be used in applications where a direct high
level output from a transducer is not possible due to a harsh environment or because of the small size of
the transducer (e.g. miniatures). The user-programmable DCM 495 is contained in a rigid NEMA-4 plastic
box. It supplies a highly regulated bridge excitation voltage to the transducer and converts it into a +/-
10VDC output signal. The DCM 495 has three selectable excitation voltages, a programmable gain setting
and a wide adjustment on zero. Quick calibration is available through a buffered solid state shunt calibration
feature. Typical advantages like increased signal-to-noise ratio, elimination of voltage drop effects on
excitation and signals into low-impedance data systems are ensured by the careful design of the DCM
495.
1.2 Specifications
Supply Voltage:
18 - 32 VDC
Excitation Voltage to Sensor:
2.5, 5 or 10 VDC (User selectable)
Output Voltage Range:
+/-10 volts @ 2 mA
Frequency Response (1-3db):
DC
– 5000 Hz
Signal to Noise Ratio:
65 dB
Zero Adjustment Range:
+/- 25% course, +/- 10% fine
Span Adjustment Range:
Switch Selectable (1 to 32 mV/V), +/- 25% fine adjustment
Short Circuit Protected:
(+) Output to (
–) Output/Common
Environment Protection:
IP-66 or NEMA 4
Shunt Calibration:
Solid State Relay
Linearity:
+/- 0.02% of Full Scale