6
AXIS 250S Blade - Rack Solution Installation Guide
The I/O Terminal Block
Axis Blade Video Servers connect to an I/O terminal block used for transmitting data over
multi-drop communication lines:
• RS-485 Pan/Tilt devices
• RS-232 Pan/Tilt devices
• External triggering (typically associated with CCTV equipment)
The Axis Blade Video Servers support several Pan/Tilt device drivers that are available
from the Axis Web site at
www.axis.com
Connector Pinout
The pinout for the I/O Terminal Block and the signaling details for each pin:
For compatible replacement connectors, contact http://www.phoenixcontact.com, quoting:
MC1.5/14-ST-3.81 (art no 1803691).
For further information, please refer to the Unit Connections section in the AXIS 250S
User’s Manual.
Pin
Function Description
Pin
Function
Description
1
RS-232
RI
15
RS-485 - A
(non-inverting)
A half-duplex RS-485 interface for con-
trolling auxiliary equipment, e g. PTZ
devices
2
RS-232
CTS
16
RS-485 - B
(inverting)
3
RS-232
RTS
17
n/a
4
RS-232
DSR
18
GND
5
GND
19
n/a
6
RS-232
DTR
20
n/a
7
RS-232
TXD
21
GND
8
RS-232
RXD
22
Transistor Output 1
With a maximum load of 100mA and
maximum voltage of 24V DC, this output
has an open-collector NPN transistor
with the emitter connected to GND. If it
is to be used with an external relay, a
diode must be connected in parallel with
the load for protection against any volt-
age transients
9
RS-232
CD
23
Digital Input 4
Connect to GND to activate or leave
floating (or unconnected) to deactivate
10
GND
24
GND
11
n/a
25
Digital Input 3
See Digital Input 4 (above)
12
n/a
26
Digital Input 2
See Digital Input 4 (above)
13
n/a
27
GND
14
n/a
28
Digital Input 1
See Digital Input 4 (above)
