![](/images/new-backgrounds/1174957/17495737x1.webp)
Figure 6: RS-485 Control of Multiple VP-81SIDN Devices via RS-232 and RS-485
To connect up to four VP-81SIDN devices:
1.Connect the
2.Connect the
3.Connect the HDMI LOCAL INPUT on the first device to the HDMI OUT on the second device, and so on for all devices.
4.Set the machine number and termination as follows:
The first device is machine number 1 and the subsequent three devices are machine numbers 2 to 4 (see Section 8.1)
Terminate the first and last devices, that is, terminate machine numbers 1 and 4 (see Section 8.3). Ensure that all other devices are left unterminated
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