Specifications

Remote Control Unit (RCU-200)
VTM-200 Installation and Operation Handbook D-2
panel of the RCU-200, and secure it by tightening the captive screws. Route the
cable as required and connect the other (male) cable end to the 9-pin COM (female)
connector on the back panel of the VTM-200(L).
4. Connect the IEC connector end of the power cord to of the power supply and
connect the other end to a properly grounded outlet. The RCU-200 will operate on
nominal voltages of 115/230 VAC, 50 or 60 Hz.
5. When connecting an RCU-200 to a VTM-200 that previously operated as a
stand-alone unit, the user should verify, using the VTM-200 SETUP menu, that the
COM rate is configured for 38,400 bps, and that the VTM-200 firmware revision
level is 1.8 or greater.
The data communication rate between the RCU-200 and the VTM-200(L) COM
interface is 38,400 bps. This rate cannot be changed remotely by the RCU-200 or by
commands issued to the VTM-200(L) over the COM interface. The data rate can be
changed only by the VTM-200 front panel controls (via the VTM-200 SETUP menu)
or by a sequence of keystroke commands from a standard AT keyboard connected to
the 6-pin, mini DIN, KEYBOARD connector on the VTM-200(L) back panel.
Transmission rates in the range of 300–38,400 bps may be selected in this manner.
Use of the RCU-200 does not preclude use of the VTM-200(L) COM interface for
updating the VTM-200(L) flash ROM, which holds the firmware program for the
VTM-200(L) embedded microcontroller. The flash ROM can be updated by cabling it
to a 9-pin, serial, COM port on a PC capable of running the necessary update software.
The communications parameters are 8 data bits, no parity, with 1 stop bit.
RCU-200 COM Port Electrical Interface Selection
CAUTION — these instructions are for use by qualified personnel only. To reduce
the risk of electric shock, do not perform this installation or any servicing unless you
are qualified to do so. Refer all servicing to qualified service personnel.
The COM interface on the VTM-200 as well as the Remote Control Unit (RCU-200)
are factory configured to use an EIA-232 electrical interface for communications. Both
the RCU and the VTM units are capable of utilizing an alternate cable interface,
RS-422, which permits longer inter-unit cabling distances. In order to support an
RS-422 connection the internal jumpers must be reconfigured. See Interface Mode
Jumper Configurations for more details.
Interface Mode Jumper Configurations
In order to utilize the RS-422 interface, internal jumpers in both the VTM and RCU
units must be repositioned. Table D-2 details the jumper configuration for the
RCU-200. All signal and power cabling should be removed from the units before
disassembly. The jumpers on the RCU-200 are located near the back connector area of
the VTM204 board.