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KRAMER: SIMPLE CREATIVE TECHNOLOGY
Connecting the VS-88SDI
12
Figure 3: DIP-Switch Settings
Table 4: DIP-Switch Settings
DIPS
Function
Description
RS-485 Term
RS-485 line termination
OFF for no RS-485 line termination
ON for RS-485 120
Ω
line termination
PROG
Firmware update
Set ON only to update device firmware
MACH #
1, 2, 3, 4
Self Address
Sets the MACHINE # (see section
6.1.1
)
The RS-485 TERM DIP-switch is used only when the RS-485 port is
connected (see section
6.2.2
). The first and last units on the RS-485 line
(for example, the controller and the last
VS-88SDI
) must be terminated;
the units in between must not be terminated.
Set the PROG DIP-switch ON only while updating the unit firmware,
otherwise the switch must be OFF.
6.2
Connecting a PC or Controller to the RS-485 Port
You can operate the
VS-88SDI
via the RS-485 port from a distance of up to
1200 meters (3900ft) using any device equipped with an RS-485 port (for
example, a PC). For successful communication, you must set the RS-485
machine number and bus termination.
To connect a device with a RS-485 port to the
VS-88SDI
:
•
Connect the A (+) pin on the RS-485 port of the PC to the A (+) pin on
the RS-485 port on the rear panel of the
VS-88SDI
•
Connect the B (–) pin on the RS-485 port of the PC to the B (–) pin on
the RS-485 port on the rear panel of the
VS-88SDI
•
Connect the G pin on the RS-485 port of the PC to the G pin on the
RS-485 port on the rear panel of the
VS-88SDI
6.2.1 Setting the Address Switches
To set the address DIP-switches:
•
Assign Master Machine #1 to the master unit with the address
0 or 1 set in the DIP-switches
•
Assign a unique Machine # from 2 to 15 for each
VS-88SDI
slave
unit using
Table 3
. The units do not have to be sequentially
numbered but they must have unique addresses