Appendix F -
The IO Terminal Block
AXIS 2400/2401 Administration Manual
56
Appendix F - The IO Terminal Block
Typically used in association with programming scripts for developing applications for motion
detection, event triggering, time lapse recording, alarm notification via e-mail, picture storage to
FTP locations and a variety of other functions; the 16-pin IO Terminal Block is located on the rear
panel and provides the interface to: a single relay switch output, four digital photo-coupled inputs,
an RS 485 interface, and auxiliary power.
This appendix describes the pinout, interface support and the
control and monitoring functions provided by this connector.
Note:
Appendix H- The Programming Script
supplements the informa-
tion provided within this section and is recommended reading
for developers wanting to fully utilize the control and monitor-
ing functions suppor ted by this connector.
Connector Pinout
The pinout for the Terminal Block
(illustrated left)
and signaling details for each pin is fully
described in the table below:
Pin
Function Description
1
Auxiliary AC Power Input
Electrically connected in parallel with PS-D power connector, pins 1 &
2 provide an auxiliary connector for mains power to the unit.
2
Auxiliary AC Power Input
3
Digital Input 3 - Photocoupler Anode (+)
Photocoupled Input 3: Electrically isolated from the chassis and con-
nectors, this input can be supplied from an external DC voltage or
the DC Power Input/Output on pins 9 and 10.
4
Digital Input 3 - Photocoupler Cathode (-)
5
Digital Input 4- Photocoupler Anode (+)
Photocoupled Input 4. As above.
6
Digital Input 4 - Photocoupler Cathode (-)
7
RS 485 - B (inverting)
Serial Port1- RS485. A half duplex RS485 interface for controlling
auxiliary equipment. Note: Serial Port 1 is programmed as either
RS232 (COM1 Connector) or RS485 (Terminal Block Connector), via
the Web browser interface.
8
RS 485 - A (non-inverting)
9
DC + Power (Input or Output)
DC Power Input or Output: Used as an input, it supplies the Axis
2400 via a DC source; for example. a solar panel or a battery.
As an output, it can drive the photo coupler inputs or other equip-
ment; such as an IR-sensor. The output voltage level is dependent
upon the input voltage to the unit. A maximum current of 50mA can
be sourced from the DC output.
Pin 10 is connected to unit chassis, and Ground on each serial port
and video input. See circuit diagram (below).
10
DC - Power (Input or Output)
11
Digital Input 1 - Photocoupler Anode (+)
Input 1 Photo coupler input. As Input 3.
12
Digital Input 1 - Photocoupler Cathode (-)
13
Digital Input 2 - Photocoupler Anode (+)
Input 2 Photo coupler input. As Input 3.
14
Digital Input 2 - Photocoupler Cathode (-)
15
Relay Switch
Relay switch - electrically isolated from chassis and connectors.
16
Relay Switch
1 2 3 4 5 6 7 8
9 10 11 12 13 14 15 16