OEM335A ANDERS ELECTRONICS, OEM335A Datasheet - Page 2

• Manufacturer Part Number: OEM335A
• Description: DPM, LED, 3.5DIGIT
• Manufacturer: ANDERS ELECTRONICS

Specifications of OEM335A

• Supply Voltage Range: 4.75V To 5.25V
• Backlighting Colour: Red
• No. Of Digits / Alpha: 3.5
• Display Size: 46mm X 14mm
• Panel Cutout Height: 26mm
• Panel Cutout Width: 56mm
• Operating Temperature Range: 0°C To +50°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DC VOLTAGE MEASUREMENT
AC VOLTAGE MEASUREMENT
The OEM335A is designed for +5V single rail supply.
Incorrect supply will damage the module.
Apply the input signal between pin 3 (INHI) and pin 4
(INLO). The input range is 0 - 199.9mV.
Over range is indicated by illuminating a "1" in the most
significant digit and blanking the other digits.
It is recommended to use this module with floating inputs
i.e. the low input signal (INLO) must be isolated from the
power supply ground (GND). Where (INLO) must be
referenced to the power supply, connect via a 10KΩ
resistor and a 0.1µF capacitor as shown opposite.
To activate a decimal point, connect the appropriate
decimal point pin to DPcom.
DC CURRENT MEASUREMENT
The meter can only measure DC. Use the above circuit to convert AC to
DC. For voltages above 200mV AC, a potential divider is required before
the converter circuit as shown in the "Voltage measurement" section
above
USER INSTRUCTIONS
APPLICATION CIRCUITS
The input impedance becomes R1+R2. Choose accurate stable
resistors. Typically, R1=1MΩ. 9MΩ is a practical upper limit.
To measure voltages greater than 200mV
an attenuator is required.
EXAMPLES
10V 1500rpm
V
2V
V
IN
IN
anders
=V
Shunt resistance
It is important to note the power
dissipation in the shunt and choose
resistor rating accordingly
Display
1.999V
D
EXAMPLES
P
x
Tel: [phone] Fax: [phone]
S
R1+R2
Current
200mA
=
R2
2A
Vs
I
IN
electronics plc
199.9mV 1MΩ 110KΩ
2
150mV
= I
V
V
D
IN
D
0.1Ω
1Ω
2
R
max. is 199.99mV
R
R
S
S
S
1MΩ
R1
=
Ω
Vs
I
IN
0.04W
0.4W
Ω
P
15KΩ
S
R2
Bayham Place, London NW1 OEU UK
MULTI-RANGE DC VOLTAGE MEASUREMENT
DC MULTI-RANGE CURRENT MEASUREMENT
CONNECTION DIAGRAM
www.anders.co.uk
OEM335AV4
BASIC CONFIGURATION
For multi-range, use, a 2 pole,
4 way rotary switch. 1 pole for
range select and the other to
connect the appropriate
decimal point to V+
For multi-range, use, a 2 pole,
5 way rotary switch. 1 pole for
range select and the other to
connect the appropriate
decimal point to V+
Revision 4 - 21/10/03