Appendix C. Keyboard Connector Pin-Outs (Continued)
| VOLUME |
|
RELAY 12C COM 3 COM 2 COM 1 | RESET | DIP SWITCHES |
|
BUTTON
I2C Bus Port
This special port will be used in future for expansion of keyboard func- tionality - it is not available for use as a general purpose serial commu- nications port. These I/O lines are connected to
JP4 Pin | Function |
|
|
6 | +5 VDC Out |
|
|
5 | +5 VDC Out |
|
|
4 | Gnd |
3 | SDA In/Out |
|
|
2 | Gnd |
|
|
1 | SCL In/Out |
|
|
Relay Port
Supported by Relay RE1 and RE2 as defined by user (1 Amp internal relay rating). Relay contacts appear at
JP5 Pin | Function |
6 RE2 Normally Open
5 RE2 Normally Closed
4 RE2 Common
3 RE1 Normally Open
2 RE1 Normally Closed
1 RE1 Common
PIN 1
Pelco Manual C540M (6/98) | 35 |