Dedicated Micros Digital Sprite 2 Setup Manual page 11

Serial telemetry
Digital Sprite 2 currently supports a number of PTZ / dome protocols using
serial telemetry, as well as various RS232 matrix protocols.
Serial telemetry requires a twisted-pair connection from the Digital Sprite 2's
serial port to the dome.
Serial telemetry can be either star configured (from the Digital Sprite 2 serial
port to each receiver), or delta configured (each receiver are linked (looped)
together), or a combination of the two. Therefore each receiver needs to be
addressed according to its camera number – consult your receiver
documentation for details.
Serial telemetry connection
There are four, 9-Way D-Type serial ports on the Digital Sprite 2. Serial 1 and
2 are allocated as full RS-232 only, with Serial 3 (BUS A) and 4 (BUS B) able
to support RS-232, RS-422 and RS-485.
The 9-Way D-Type has the following pin connections and RS-232, RS-422,
RS-485 pin allocation:
5
1
6 9
View from rear of unit
RS-232
Serial 1 & 2
RS-232 Pin Allocation
Data Carrier Detect ( DCD) 1
Receive Data (RX) 2
Transmit Data (TX) 3
Data Terminal Ready (DTR) 4
Ground (GND) 5
Data Set Ready (DSR) 6
Ready To Send (RTS) 7
Clear To Send (CTS) 8
Ring Indicate (RI) 9
Serial 3 & 4
Pin Allocation
-
2
3
-
5
-
7
8
-
RS-422
Serial 3 & 4
RS-422 Pin Allocation
Transmit Data (TX+) 1
Transmit Data (TX-) 9
Receive Data (RX-) 4
Receive Data (RX+) 6
RS-485
Serial 3 & 4
RS-485 Pin Allocation
Transmit Data (TX+) 1
9
Transmit Data (TX-)
Note: The screen from the cable should be connected to the connector frame.
The RS485 configuration is a bus topology, the maximum distance between
the initial piece of equipment and the last piece is 1200 meters (4000 feet), this
distance must not be exceeded. The bus should be terminated at each end
with 120 Ohm resistance.
Important notice regarding EMC compliance - Use only screened cables when
connecting to the Serial Port(s) of this equipment. The screen should be
connected to the chassis of the Digital Sprite 2.
Termination Dip Switches
The termination dip switches ensure the termination on the serial ports is
correct. When connecting 485-Bus, RS-422 and RS-485 serial devices to
Digital Sprite 2, it is important that the dip switches are set as follows:
SW1 DM 485 Bus
SW2 SERIAL 3 RS485 termination (TX)
SW3 SERIAL 3 RS422 termination (RX)
SW4 SERIAL 4 RS485 termination (TX)
1 2 3 4 5
SW5 SERIAL 4 RS422 termination (RX)
9