Introduction
Digital Signage devices have a serial cable for interfacing with hospitality TV sets.
Prerequisites
None
Summary
Digital Signage device serial cable pin-out
The interface is provided at serial RS232 standard on a DE-9 male connector. The DE-9 male connector is wired as shown below (view on pins):
- Pin 1 - IR receive/ pass through from TV. TTL level S.SV max with integrated weak pull-up resistor 47K nominal
- Pin 2 - Rx
- Pin 3 - Tx
- Pin 4 - DTR (internally looped from DSR)
- Pin 5 - Ov
- Pin 6 - Not connected
- Pin 7 - RTS (internally looped from CTS)
- Pin 8 - Not connected
- Pin 9 - IR transmit (LVTTL, 4mA max)
RJ12 to DE-9 adapter
The supplied RJ12 to female DE-9 adapter can be used with the above cable to construct a DE-9 to DE-9 cable with flexible pinning for different models of hospitality TVs.
By using the pin-outs above, together with the pin-out of the connector on your TV set, the adapter pins can be inserted in the correct locations of the DE-9 connector shell to match your TV.
Unused connection wires in the adapter can be trimmed off.
| RJ12 connector | Wire colour |
| Pin 1 | Blue |
| Pin 2 | Yellow |
| Pin 3 | Green |
| Pin 4 | Red |
| Pin 5 | Black |
| Pin 6 | White |
DE-9 to RJ12 connector cable
The serial cable is wired as shown below:
(this may not correspond to the wiring in your TV set: consult your TV manual for wiring details)
DE-9 female connector
- Pin 1 - IR pass-through
- Pin 2 - Rx
- Pin 3 - Tx
- Pin 5 - Ov
- Pins 4, 6, 7, 8, 9 - not connected
RJ12 connector
- Pin 5 - IR pass-through
- Pin 2 - Tx
- Pin 3 - Rx
- Pin 4 - Ov
- Pins 1, 6 - not connected
References
None