Axis Communications AXIS 2420 I/O-B Connector, Schematic diagram showing possible application

66 The Unit Connectors AXIS 2420 User’s Manual

The I/O-B Connector

The 4-pole I/O-B connector provides a digital relay switch for the control of external surveillance devices and services; such as, lighting, annunciators, audible alarms, etc. It is also an RS-485/422 port for the control of pan tilt devices, etc. A pinout table is provided below.

Pinout Information

Pin Function

1Relay switch - pole 1. Electrically isolated from chassis and connectors.

1

2Relay switch - pole 2. Electrically isolated from chassis and connectors.

2

3RS-485/422 - B (inverting)

A half-duplex RS-485/422 interface for controlling auxiliary equipment. 3

4RS-485/422 - A (non-inverting)

4

Schematic diagram - showing possible application

I/O-B

Optional

Relay

o

1

Switch

!

Relay

o

o

Appliance x

Switch

o

o

o

2

!

o

o o

+ o o _

24V DC

Mains Power

RS-485/422 B o

3

External

PTZ

RS-485/422 A o

4

Device