Parker Vansco - Page 34

24 VMM2404
Inputs
The following table provides specifications for the power control digital input:
Power Control Digital Input Specifications
Item
Min
Nom
Max
Unit
Input voltage range
0
-
32
V
Pull-down resistance
3.1 k
-
3.5 k
Ω
Minimum negative going threshold
2.14
-
-
V
Maximum positive going threshold
-
-
4.0
V
Power-up threshold
-
1.7
-
V
Cutoff frequency (hardware)
8
-
85
-
Hz
De-bounce time (software)
9
25
-
50
ms
Overvoltage
-
-
36
V
Wetting current @ 12 V
3.43
-
3.87
mA
Leakage current sleep mode
- battery @ 12 V
-
-
200
uA
3.2.2.2. Power Control Digital Input Installation Connections
You must be aware of the following when connecting the power control digital
input:
 The power control digital input is usually connected to the vehicle ignition,
but it can be connected to any power source in a system.
 To protect the harness that connects the VMM2404 to the ignition, place a
fuse of 200 mA or higher in the circuit that feeds the VMM2404.
 If your VMM2404 must always be powered, the power control digital input
can be directly connected to a fused battery power input (called VBATT),
which will provide constant power.
 When battery power (VBATT) is connected, and the power control digital
input is inactive, the VMM2404 will go into sleep mode.
8
Assumes there is a zero ohm source impedance from driving source. The actual cutoff in the application will be partially
determined from the source impedance and VMM input capacitance.
9
De-bounce time is based on a sampling rate of 40 Hz.