AVL-75 User Manual
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TTW-AVL75-UM001
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The outputs are Open-Drain type with no internal pull-up resistor which can also be used to control a relay. It
means that the user has to connect a pull-up resistor or a relay coil between
the output pin and any positive
voltage (32V max) to generate a correct output. Each output can drive a continuous current of 0.15A.
The green wire is low side 150mA max, and the blue wire is low side 150mA max with latch.
The electrical conditions are:
Table 7: Electrical Conditions of Digital Outputs
Note:
1. The relay output can be latched by the software, so even if the AVL-75 is restarted or powered down in
some cases, the relay output will not change. To use the latch function, the main power and backup battery
should be connected. Otherwise the relay will always be in normal close status.
Digital outputs are used for cutting/restoring GND. The examples of connections are:
Figure 5.
The Example of Connection to Drive An LED
Figure 6.
The Example of Connection to Drive A Relay
Note: All outputs are internally pulled up to PWR pin by a diode. So no external fly-back diode is needed
when the output is connected to an inductive load.
Logical State
Electrical State
Enable
<1.5V, drive current is 0.15A
Disable
Open or the pull-up voltage (max 32V)
