ERECA, 75 rue d'Orgemont, 95210 Saint Gratien, France T: +33 1 39 89 76 23 W: ereca.fr
SR2 Installation Manual EN
1.3.7 Serial ports
Two multiprotocol RS232/422/485 serial signals are transmitted in standard by the equipment.
The supported data rate of each signal is about 500Kbds.
The setting of the serial protocol is done within the web server of the Stage Racer 2.
1.3.7.1 RS422/485
The RJ 45 connector provide 1 differential pair for RS422 transmission and 1 differential pair for RS422
reception.
To build a half-duplex RS485 transmission, just bridge “pin 3 with pin 4” and “pin 5 with pin 6”.
For RS485, setup the corresponding Baud rate within the web server to enable the Stage Racer 2 to manage
the output impedance at the right serial byte duration.
Connect the Shield to pin 1.
1: GND (Shield)
2: GP IN
3: RX RS 422 – (Stage Racer 2 electrical OUTPUT)
4: TX RS 422 – (Stage Racer 2 electrical INPUT)
5: TX RS 422 + (Stage Racer 2 electrical INPUT)
6: RX RS 422 + (Stage Racer 2 electrical OUTPUT)
7: GP OUT
8: GP OUT
Note: For RS 485 Telex/RTS talkback panels please ask ERECA for wiring tip.
1.3.7.2 RS232
Refer The RS 232 signal ground to pin 1. Leave pins 5 and 6 unconnected.
1: GND (Ground ref/Shield)
2: GP IN
3: RX RS 232 – (Stage Racer 2 electrical OUTPUT)
4: TX RS 232 – (Stage Racer 2 electrical INPUT)
5: Do not connect
6: Do not connect
7: GP OUT
8: GP OUT
Those serial ports appear in the RS232/422/485 grid and are connectable in a peer 2 peer manner.
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