FLIR PTU-D300, User Manual, Page: 26 / 66

PTU ‐ D300 E Series User Manual
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
You do not need a crossover cable.

If needed, you may use a coupling to extend the Ethernet connection on the breakout cable.
Note: The Ethernet and serial interfaces may be connected simultaneously; however,
you should only use one interface at a time for command and control of the PTU ‐
D300.
Connect, power on, and test the PTU ‐ D300 using the Ethernet connection and Web interface as
described in Section 3.4.
4.6.2 – RS ‐ 232 Electrical Connection
PTU ‐ D300 units with RS ‐ 232 communications have the following connections:

TxD: Pin 2 (carries data from the PTU ‐ D300)

RxD: Pin 3 (carries data to the PTU ‐ D300)

GND: Pin 5
Note: TxD and RxD assignments can vary depending on your host computer. If your
initial connection does not work, try using a null modem.
Serial communication between the PTU ‐ D300 and your host computer should be set as follows:

Baud rate: 9600. You may adjust the baud rate using software commands. Please refer to
the Pan ‐ Tilt E Series Command Reference Manual for instructions.

Start bit: 1

Data bits: 8

Stop bit: 1

Handshaking: off

XON/XOFF: not used
4.6.3 – RS ‐ 485 Electrical Connection
PTU ‐ D300 units with RS ‐ 485 communications have the following connections:

Duplex: full

Connections: Tx+, Tx ‐ , Rx+, and Rx ‐

Voltage: RS ‐ 422 or RS ‐ 485 levels
Serial communication between the PTU ‐ D300 and your host computer should be set as follows:

Baud rate: 9600. You may adjust the baud rate using software commands. Please refer to
the Pan ‐ Tilt E Series Command Reference Manual for instructions.

Start bit: 1