Starrett 2900 Capacitive Electronic Indicator Manuel d'utilisateur Page 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
IP67 Rating (Ingress Protection Rating)
6 No ingress of dust
7 No ingress of water when submerged to 1m deep for 30 minutes
IP67 rating
assured only
if all parts
listed right are
attached and
tightly secured
Spindle Bellows
Back-lug with Gasket
Stem Cap
Data Output Cover or Data Cable with Gasket
Battery Door with Gasket
Pin 1
Pin 2
Pin 3
Pin 4
2900 Capacitive Series Indicator User Manual
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