User's Manual Part 1

57
RS232
On the front panel of the AC there is a D-SUB9 female connector used to control the transmitter from a PC,
using a standard RS232 serial connection. For more information about remote control option, contact the
Sales Department of Elettronika S.r.l. or the local distributor.
The pin-out of this connector is DCE-type and can be connected to a PC using a direct cable.
This connector can also be used to update the firmware of the AC. This operation should only be performed
by qualified technicians.
RS485
On the rear panel there is a D-SUB9 female connector used for remote control via RS485. The RCU device
manufactured by Elettronika S.r.l. is needed for this feature to be used. For more information, contact the
Sales Department of Elettronika S.r.l. or the local distributor.
Telemeasures
The D-SUB25 female connector allows to control the transmitter remotely using a generic control interface.
Some analogue and digital outputs are available on this connector, thanks to which a control system can read
the status of the transmitter. There are also some inputs allowing to switch the transmitter on and off from
remote by opening or closing some contacts.
It is possible to connect two switches to close pin 1 and pin 14 to GND. Usually the switch on pin 1 is open
in order to disable remote control. To switch the transmitter on/off, close/open the switch on pin 14 depending
on the command to be given, then close the switch on pin 1 to send the command. Once it has been received
by the AC, the switch on pin 1 can be open again. For better comprehension see the figure below, showing the
closed switch with a low level and the open one with a high level.
POWER
MICROPROCESSOR CONTROLLED SYSTEM
RS232
AMPLIFIER CONTROL
SERIAL PORT