PAGE 3
SENSO
RS AN
D INS
TRUME
N
TATIO
N F
OR MAC
HINE
CON
DITION M
ONIT
ORIN
G
Introduction
The models 682M57 and 682M74 are differential charge input amplifiers, designed to interface with differential
output charge sensors. The unit will convert the charge signal from any differential output charge sensor into a
voltage output. The front end differential charge amplifiers are designed to handle low sensor resistance that is
common at very elevated temperatures ( >500ºF ). An ICP
®
Din Rail signal conditioner is required for use with the
differential charge amplifier, to provide the appropriate power supply.
General Features
Din Rail Mount
Removable Terminal Blocks for easy wiring
35mm (1.38in) Din Rail Mount configuration
Space saving 22.5mm (0.9in) wide design
Installation and Wiring
Installation
The 682M57 and 682M74 are designed to be mounted on a 35mm Din Rail. Do not install in a harsh area where it
can be exposed to cleaning fluids or machine oils. The unit should be mounted in a NEMA type enclosure to
protect the electronics from contamination.
CE Requirements
The 682M57 and 682M74 are CE marked ( see Declaration of Conformity for specific standards ). To meet the
requirement, the unit must be installed in a grounded metallic enclosure and sensor cable shield terminated to
enclosure. Failure to do so can cause erroneous readings where high frequency noise is present.
Outline Drawing
