Connecting the VP-81SID 8x1 Digital STEP-IN Switcher
15
15
6.4.2 Setting the RS-485 Bus Termination
Figure 6
illustrates the factory default DIP-switch positions.
Figure 6: RS-485 Termination DIP-switch
DIP-switch 1 sets the RS-485 bus termination of the
VP-81SID
. Only the first and
last physical units on the RS-485 bus must be terminated, all others must be
unterminated. Moving the DIP-switch up turns the termination off (default),
moving the switch down enables the termination.
6.4.3 Connecting and Controlling Multiple VP-81SID Devices
You can connect up to four
VP-81SID
devices with operation via RS-232 (as
shown in the example in
Figure 7
) or Ethernet. Connecting four devices provides
37 inputs.
To connect up to four VP-81SID devices:
1. Connect the RS-232 port
1
on the first
VP-81SID
device to the PC (see
Section 6.3
).
2. Connect the RS-485 terminal block port on the first device to the RS-485 port
on the second device, and so on for all devices. (Connect A to A, B to B, and
G to G.)
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 6.4.1
)
Terminate the first and last devices, that is, terminate machine numbers 1
and 4 (see
Section 6.4.2
). Ensure that all other devices are left
unterminated
1 Alternatively, the RS-485 port could be used for PC control
im Vertrieb von CAMBOARD Electronics
www.camboard.de
Tel. 07131 911201
Fax 07131 911203
