Parker Vansco - Addressing Digital Inputs

User Guide 25
Inputs
The following shows a typical power control digital input connection:
Internal to product
Power Control Input
Power
Control
Pull-Down
Resistor
Battery
Fuse Min.
200 mA
Application Switch
Figure 10: Power control digital input installation connections
3.2.3. Addressing Digital Inputs
The VMM2404 has 5 active low digital inputs that are used for module
addressing on the CAN network:
 ADDR1 to ADDR5
3.2.3.1. Addressing Digital Input Capabilities
The following table provides specifications for the VMM2404 addressing digital
inputs:
Addressing Digital Input Specifications
Item
Min
Nom
Max
Unit
Input voltage range
0
-
32
V
Overvoltage
-
-
36
V
Pull-up resistance
9.8 k
-
10.2
kΩ
Minimum negative going threshold
0.9
-
-
V
Maximum positive going threshold
-
-
2.15
V
Cutoff frequency (hardware)
-
80
-
Hz
De-bounce time
10
-
-
-
ms
Wetting current
316
-
343
uA
Leakage current sleep mode
- pin grounded or floating
-
0
-
A
10
De-bounce time for address inputs is based on hardware cutoff frequency. The software reads the address in succession
during power-up until it receives two consecutive results that are the same. The time between readings is in the microsecond
range so there is technically no software de-bounce on these inputs.