Verint Nextiva S1700e Series, Руководство пользователя

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Nextiva S1700e Series User Guide
Verint Video Solutions 17
The numbering of the pins on the DB-9 connector is:
RS-422/485
Most target devices (keyboards, PTZ cameras) use the
RS-422/485 protocol for communication. These devices are
categorized DTE (data terminal equipment); for more
information about DTE and DCE (data communication
equipment), see Appendix B on page 49.
To use the RS-422/485 functionality, you need to:
1. Connect a twisted pair cable to the multipole connector on
the back of the device. The connector gives access to the
Tx+, Tx-, Rx+, Rx-, and ground signals.
2. Select the right operating mode (RS-422 4 wires, RS-485
2 wires, or RS-485 4 wires) using SConfigurator, the web
interface, or a video management software.
To properly make the connection to a four-wire RS-422 or
RS-485 serial device, use the following scheme (where the Tx
connectors are for input and the Rx connectors are for output):
For a two-wire RS-485 connection with a Nextiva device:
1. Create the Data- signal by shorting the Rx- and Tx- pins
together.
2. Create the Data+ signal by shorting the Rx+ and Tx+ pins
together.
Peripheral connector S1700e connector
Tx+ Tx+
Tx- Tx-
Rx+ Rx+
Rx- Rx-
ground ground