Martel Electronics MPP-24-M - Manual (Page 5)

IN1
4 - 30V
0V
0 - 40V
0 - 40V IN2
IN1
4 - 30V
0V
0 - 40V
0 - 40V IN2
ALM1
ALM2
R R
R = (V
S
- V
L
)
I
L
V S = Supply voltage
V L = LED Voltage drop
I
L
= LED current
4 - 30V
0V
V-
0V
IN1 4 - 20mA
50
200mW
DIGI1
DIGI2
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VARIOUS OPERATING MODES
DIGITAL HOLD
DIGI1 will hold the display for IN1
DIGI2 will hold the display for IN2
ALARM OUTPUTS
Applications that feature an alarm can be connected as above.
ALM1 and ALM2 must not sink more than 10mA maximum each.
If supply voltage varies, use an appropriate voltage regulator.
MEASURING 4-20mA
Use a 50 Ω resistor with a 200mW rating.
Setup scaling in software 0.2V=4.0 and 1V=20.0
Cannot be loop powered. Supply must be isolated from current loop.
MPP-2 4-M