Difference between revisions of "RS232 and GPIO Connector"

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m (Camille moved page RS232 to RS232 and GPIO Connector: Incomplete title)
(Added pin table)
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==Connector==
 
==Connector==
 
[[File:DB25.png|thumb]]
 
[[File:DB25.png|thumb]]
 +
{| class="wikitable"
 +
!Pin
 +
!Function
 +
!Direction
 +
|-
 +
|1
 +
|GND
 +
|Ground
 +
|-
 +
|2
 +
|RS_TXD
 +
|Out
 +
|-
 +
|3
 +
|RS_RXD
 +
|In
 +
|-
 +
|4
 +
|RS_RTS
 +
|Out
 +
|-
 +
|5
 +
|RS_CTS
 +
|In
 +
|-
 +
|6
 +
|GPI8
 +
|Opto isolated Input
 +
|-
 +
|7
 +
|GND
 +
|Ground
 +
|-
 +
|8
 +
|GPI6
 +
|Opto isolated Input
 +
|-
 +
|9
 +
|GPI5
 +
|Opto isolated Input
 +
|-
 +
|10
 +
|GPI4
 +
|Opto isolated Input
 +
|-
 +
|11
 +
|GPI3
 +
|Opto isolated Input
 +
|-
 +
|12
 +
|GPI2
 +
|Opto isolated Input
 +
|-
 +
|13
 +
|GPI1
 +
|Opto isolated Input
 +
|-
 +
|14
 +
|GPOCOM
 +
|Common GPO rail
 +
|-
 +
|15
 +
|GPO1
 +
|Solid State Relay
 +
|-
 +
|16
 +
|GPO2
 +
|Solid State Relay
 +
|-
 +
|17
 +
|GPO3
 +
|Solid State Relay
 +
|-
 +
|18
 +
|GPO4
 +
|Solid State Relay
 +
|-
 +
|19
 +
|GPO5
 +
|Solid State Relay
 +
|-
 +
|20
 +
|GPO6
 +
|Solid State Relay
 +
|-
 +
|21
 +
|GPO7
 +
|Solid State Relay
 +
|-
 +
|22
 +
|GPI7
 +
|Opto isolated Input
 +
|-
 +
|23
 +
|GPO8
 +
|Solid State Relay
 +
|-
 +
|24
 +
|GPICOM
 +
|Common GPI High-side rail
 +
|-
 +
|25
 +
|GP5V
 +
| +5V (Out), Fuse protected (100mA)
 +
|}
 +
 +
==RS232==
 
The DB25-M GPIO+RS232 is compatible with the V.24 standard, "DTE" side, meaning that it's the same as a computer-side connector.  
 
The DB25-M GPIO+RS232 is compatible with the V.24 standard, "DTE" side, meaning that it's the same as a computer-side connector.  
  

Revision as of 08:09, 15 June 2020

The RS232 port can be used to feed the SOUND4 device with RDS UECP commands.

Only the RXD/TXD signals are used for UECP, there is no handshaking : the CTS/RTS are not used

Connector

DB25.png
Pin Function Direction
1 GND Ground
2 RS_TXD Out
3 RS_RXD In
4 RS_RTS Out
5 RS_CTS In
6 GPI8 Opto isolated Input
7 GND Ground
8 GPI6 Opto isolated Input
9 GPI5 Opto isolated Input
10 GPI4 Opto isolated Input
11 GPI3 Opto isolated Input
12 GPI2 Opto isolated Input
13 GPI1 Opto isolated Input
14 GPOCOM Common GPO rail
15 GPO1 Solid State Relay
16 GPO2 Solid State Relay
17 GPO3 Solid State Relay
18 GPO4 Solid State Relay
19 GPO5 Solid State Relay
20 GPO6 Solid State Relay
21 GPO7 Solid State Relay
22 GPI7 Opto isolated Input
23 GPO8 Solid State Relay
24 GPICOM Common GPI High-side rail
25 GP5V +5V (Out), Fuse protected (100mA)

RS232

The DB25-M GPIO+RS232 is compatible with the V.24 standard, "DTE" side, meaning that it's the same as a computer-side connector.

Consequently when connecting a computer to the SOUND4 device, you have to use a Null Modem (cross cable).

So if your PC COM is male SUBD-9, the connection must be at minimum :

  • PC COM DB9M TXD (pin 3) must go to (pin 3) DB25M RS_RXD
  • PC COM DB9M RXD (pin 2) must go to (pin 2) DB25M RS_TXD
  • PC COM DB9M GND (pin 5) must go to (pin 1) DB25M GND

(see Null_modem wiring diagram)

(Optionally other V24 signals can be connected (CTS, RTS, CD, DSR, DTR) so a fully wired branded Null-Modem cable or adapter should work)

Notes :

  • the RS232 output voltage is approx. ±6V. Full ±12V is accepted at input.
  • the output RS_TXD pin is not active (so is 0V instead of +6V) until there is activity on RS_RXD pin.
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