AXIOMTEK tBOX324-894-FL Series, User Manual

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tBOX324-894-FL Series U
ser’s Manual
Digital I/O
41
APPENDIX B
DIGITAL I/O
Digital I/O Specification
Digital Input:
Input channels: 4, sink/source type
Input voltage: 0 to 30VDC at 25Hz
Input level for dry contacts:
Logic level 0: close to ground
Logic level 1: open
Input level for wet contacts:
Logic level 1: +/-3VDC max.
Logic level 0: +/- 10VDC min. to +/-30VDC max. (source to digital input)
Digital output:
output channels: 4, sink type
output current: 200mA max. per channel
on-state voltage:12~ 24VDC nominal
max. voltage on COM+: 30VDC
Digital I/O Software Programming
 I2C to GPIO PCA9554PW GPIO Group0[3:0] is Output, Group0[7:4] is
I
ntput.
 I2C address: 0b0100010x.
 Registers:
Register 0: Input Group0 register.
Register 2: Output Group0 register.