3. Connect the terminal block plug to the rear of the device.
Connecting RS-422/485 Four-Wires
Most target devices (keyboards, PTZ cameras, monitors) use the RS-422/485 protocol for
communication.
Using a twisted pair cable, connect the signals as shown in the table below.
Signal on Peripheral Signal on S1800e
Tx+ Tx+
Tx- Tx-
Rx+ Rx+
Rx- Rx-
ground ground
NOTE: On some equipment, signal terminology may vary. Refer to the peripheral documentation to
find the equivalent terms.
► Perform the following steps:
1. Remove the terminal block plug from the rear of the device.
2. Connect a twisted pair cable to the terminal block plug as shown below.
Connecting a Serial Device
36
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