Starrett 2900 Indicator - Manual (Page 11)

2900 Indicator User Manual
11
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Appendix B: Serial Output Connector
Pin 1 GND – Signal return
Pin 2 Serial Receive Data Input (RX/RQST)
Pin 3 Serial Transmit Data Output (TX/DATA)
Pin 4 Remote Zero – Special Order Only
State Change High to Low
Serial Input Voltage Level Specification
Logic “0”
Vin < 1.30 Volts
Logic “1” Vin > 1.98 Volts
Serial Output Voltage Level Specification
Minimum Maximum
Low Level Vss
Vss +0.25 @ -1.5mA Load
High Level Vdd –0.25 @ 1.25 mA Load
Vdd
Note: Vss = 0 Volts, Vdd = 2.7 to 3.6 Volts
Environmental Consideration
Temperature
10-30 °C,
Humidity 30-85%RH (no condensation)
Atmosphere Non-corrosive, Non-flammable
Pin 1
Pin 2
Pin 3
Pin 4