Specifications

Quintech Electronics and Communications Inc. Protocol Version 2.15 20

SRX Series Protocol

Serial Interface

A new command can be sent to the matrix as soon as a response to the previous command

is received. If a break in communication occurs while a message is being transmitted the

input buffer will automatically clear and no error response will be given.

Serial Parameters:

Baud Rate: 9600

Data Bits: 8

Stop Bits: 1

Parity: None

Protocol: STX/ETX

Flow Control: None. The program sending commands must wait until a response is received

from the matrix controller before sending another command.

SRX “Control In” Serial Pinouts:

RS-232 RS-422/485

1 – GND 1 - GND

2 - TXD 2 - NC

3 – RXD 3 – Non-Inverting Transmit (+)

4 – NC 4 – Non-Inverting Receive (+)

5 – GND 5 - GND

6 – Not Used 6 – Inverting Transmit (-)

7 – NC 7 - NC

8 – NC 8 - NC

9 – Not Used 9 – Inverting Receive (-)

Note on the RS-232 port:

No null modem or crossover cable is needed on the serial port.

Note on RS-485 mode:

RS-485 is compatible with RS-422. RS-485 allows multiple devices on a single shared serial

bus. The SRX unit uses a 4-wire RS-485 interface.