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APPC 1240T/1245T/1540T/1740T/1940T User Manual
Chapter 2: Jumpers and Connectors
Touch 4/5 Wire Select
Connector type: 1x3 3-pin header, 2.54mm pitch
Connector location: JP4
1 3
Pin Settings
1-2 On 5 wire
2-3 On 4 wire
1-2 On: default
COM1 RI Pin Power Select
Connector type: 1x3 3-pin header, 2.54mm pitch
Connector location: JP12
1 3
Pin Settings
1-2 On RING
2-3 On +5V
1-2 On: default
Pin Definition
1 SP1_RI
2 SP1_PSRI
3 VCC5
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