Chapter 2 Installation 23
Power LED and keylock (CN8)
You can connect an LED to indicate when the CPU card is on. Pin
1 of CN8 supplies power to the LED; Pin 3 is the ground.
You can use a switch (or a lock) to disable the keyboard. In this
state, the PC will not respond to any input. This is useful if you
do not want anyone to change or stop a running program. Simply
connect the switch between Pins 4 and 5. The pin assignments
appear in the following table:
Power LED and keylock (CN8)
Pin
Function
1
LED Power (+5 V)
2
NC
3
GND
4
Keyboard lock
5
GND
Reserved IR connector (CN9)
Reserved IR connector (CN9)
Pin
Function
1
Vcc
2
FIR_RX
3
IR_RX
4
GND
5
IR_TX
Summary of Contents for PCM-4894
Page 14: ...8 PCM 4894 User Manual...
Page 56: ...50 PCM 4894 User Manual...
Page 72: ...A 66 PCM 4894 User Manual...
Page 77: ...Appendix C Optional Extras C 71 C Optional Extras APPENDIX...