Description of functions
Copyright IXXAT Automation GmbH
14
CANio 500 Quickstart Manual, version 1.3
4.6.3 ±100 mA input range
A shunt resistor R = 15
Ω is integrated for current measurement with
±
100mA.
This results in a voltage drop of U = R * I = 15
Ω * 100 mA = 1.5 V. The load
capacity at 1.5 V is given as P = U²/R = (1.5 V)² / 15
Ω = 0.15 W. The shunt
resistor is protected via a resettable fuse. The permanent load of the shunt re-
sistor of 1/2 W or a current of 0.18 A should not be exceeded.
The voltage on the input with an input range of ±100 mA can be calculated
from the AD value as follows:
I
ANA-IN
= AD value / 4095 * 3.30 / 15 - 0.110 [A]
Simplified:
I
ANA-IN
= AD value * 0.05371
– 110 [mA]
4.7
Power supply PWR(+)
The power supply PWR(+) is monitored and measured with an additional ana-
log channel. The input voltage range is between 6 and 32 V.
The voltage on the input can be calculated from the AD value as follows:
U
IN
= AD value / 4095 * 3.30 * 10 [V]
Simplified:
U
IN
= AD value * 8.0586 [mV]