The P1AM-GPIO is an industrial rated shield that provides a convenient connection from most of
the P1AM-100 GPIO pins to the front 18 position terminal block connector. The signal level for
the GPIO pins is 3.3V. All GPIO pins (except for DAC0) include basic electrical protection including: ESD suppression, overvoltage, and overcurrent protection.
The VCC pin includes a PTC resettable fuse(Trip - 420mA; Hold - 200mA) to protect against overloading the 3.3V supply.
See below on this page for an image of the GPIO pin protection circuit.
| Terminal block | Shield pin | Functions |
| 1 | VCC | 3.3V supply output |
| 2 | DAC0* | GPIO, Analog input, Analog output |
| 3 | A1 | GPIO, Analog input, Interrupt |
| 4 | A2 | GPIO, Analog input, Interrupt |
| 5 | A5 | GPIO, Analog input |
| 6 | A6 | GPIO, Analog input |
| 7 | 0 | GPIO, PWM, Interrupt |
| 8 | 1 | GPIO, PWM, Interrupt |
| 9 | 2 | GPIO, PWM |
| 10 | 3 | GPIO, PWM |
| 11 | 4 | GPIO, PWM, Interrupt |
| 12 | 6 | GPIO, PWM, Interrupt |
| 13 | 7 | GPIO, PWM, Interrupt |
| 14 | 11 | GPIO, SDA |
| 15 | 12 | GPIO, SCL |
| 16 | 13 | GPIO, RX |
| 17 | 14 | GPIO, TX |
| 18 | GND | Ground |
GPIO Pin Protection
All GPIO pins except for DAC0 offer some basic electrical protection from temporary faults. These are not guaranteed to protect your device from all failure conditions. An example of a pin protection circuit is shown in the image below.
GPIO Operating Voltage Range: 0 - 3.3V
Compatible Terminal Blocks:
P2-RTB - Screw Type
P2-RTB-1 - Spring Clamp
Additional Resources:
Data Sheet
P1AM-GPIO on AutomationDirect.com
P1AM-GPIO Design Files