ANDERS ELECTRONICS OEM035C Service Manual
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OEM035C 3.5 di
it LCD 4-20mA Current Loop Module
features
Powered by 4-20mA input signal
12.7mm digit height
Adjustable offset and span
Selectable decimal point
Screw terminal block for easy connection
Panel mounted with optional mounting bezel
DESCRIPTION
The OEM035C is a complete digital current loop meter
module for displa
transmitter. The meter is powered from the transmitter so
no external power source is re
The transmitter loop is terminated b
and a zener diode holdin
powers the circuitr
DIMENSIONS mm
engineering units from a 4-20mA
uired.
a low impedance
the signal at 2.5V. this voltage
.
ELECTRICAL CHARACTERISTICS T
CHARACTERISTIC MIN TYP MAX UNIT
Accuracy 0.1+
Sampling Rate 2.5 reading/sec
Voltage Drop 2.5 3.0 Volts
Zero offset at 4mA -350 350 counts
Scale span at 20mA 200 1999 counts
Temperature coefficient 100
1 % + digit
=25
A
O
C
PPM/
C
°
Installation diagram
Optional Bezel
Panel cut out
66x29 mm
To fit panel
1 to 3 mm thick
OPERATING SPECIFICATION
Operating temperature 0 to 50
Storage temperature -10 to 80
Relative humidity Below 80%
O
C
O
C
PIN FUNCTIONS
PIN SYMBOL DESCRIPTION
1
2
3DP3
4 DP2
5DP1
6 DP.com
I+
I-
Positive current loop input
Negative current loop input
Decimal point select.
On when connected to DP.com
Off when left floating
CALIBRATION PROCEDURE
Example:
You have 4-20mA K type thermo-transmitter.
Temperature range -150 to 1200°C. (total span 1350
°
C)
1. Input 4mA and adjust offset pot. to give zero reading.
2. Input 20mA and adjust span pot. to give 1350 reading.
3. Input 4mA and adjust offset pot. to give -150 reading.
4. Input 20mA and adjust span pot. to give 1200 reading.
5. Repeat steps 3 and 4 for higher accuracy.
ORDERING INFORMATION
OEM035C 3.5 Digit 4-20mA Current Loop Module
MB501 Optional Black ABS Mounting Bezel
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Tel: +44 (0)20 7380 8167 Fax: +44 (0)20 7874 1908 www.anders.co.uk
Bayham Place, London NW1 OEU UK
Revision - 2 21/10/03
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