Axis 20443r2 Manuale Utente

The AXIS 230 provides one 9-pin D-sub connector, providing the physical interface for an 

RS-232 port, used for connecting accessory equipment; such as stand-alone Pan/Tilt 

devices for the remote positioning of connected video cameras. 

A diagram of the RS-232 connector, complete with pin assignment table, is shown below.

The terminal block is located on the rear panel and provides the interface to a single 

transistor output, two digital inputs, an RS-485 interface and GND. 
This section describes the pinout, interface support and the control and monitoring 

functions provided by the terminal block.

1

CD 

2

- RXD

3

- TXD

4

DTR

5

GND

6

DSR

7

RTS

8

CTS

9

RI

1

GND

2

Digital Input 1

1k internal pull-up. Connect to GND to activate.

3

Digital Input 2

1k internal pull-up. Connect to GND to activate.

4

Digital output

Maximum current sink of 100mA (via logical 0 output.) Handles a maximum voltage of 
24V DC, which is grounded at a maximum of 100mA. This output has an open-collec-
tor NPN transistor with the emitter connected to pin 1. If used with an external relay, 
a diode must be connected in parallel with the load, for protection against voltage 
transients.

5

RS-485-A (non-inverting)

 A half-duplex RS-485/422 interface for controlling auxiliary equipment.

6

RS-485-A (inverting)

5

4

3

2

1

6

7

8

9