8
Part No. 501107 Issue 13
3. OPTIONS
3.1 INTRODUCTION
OD2 Transmitter will operate with most Solartron transducers having strokes up to
E
100mm
(
E
4in), in particular with the SM, AC, AX, AT and some of the MACH 1’s. Switches on the printed
circuit card are used to set up the transmitter for a specific transducer type and onboard Span/
Zero controls are provided for calibration purposes.
3.2 4-20mA OR 0-20mA OPERATION
The OD2 will operate equally well as either a 4-20mA two wire transmitter or a 0-20mA three wire
transmitter.
3.3 4-20mA OPERATION
As a 4-20mA transmitter, only two wires are used to connect to the power supply and indicator:
Fig. 3.1 - 4-20mA Option
The transmitter draws 4mA to operate the electronics and the position of the transducer controls
a 0-16mA current sink wired in parallel. Therefore the position of the transducer is indicated by
the current consumption and a broken cable by zero current. Due to its inherent fault indication,
the need for only two wires and its low susceptibility to electrical noise/cable resistance, it is ideal
for industrial environments.
3.4 0-20mA OPERATION
The 0-20mA transmitter works on the same principle, but has three wires.
Fig. 3.2 - 0-20mA Option
This has the extra complication of the third wire, but a simpler indicator can be used.
Current
Driven
Indicator
Supply
Conditioner
Transducer
Indicator
Supply
Conditioner
Transducer
Summary of Contents for Ametek OD2
Page 1: ...OD2 USER LEAFLET ...
