C
ONVERTER
RS-232, RS-422, RS-485
O
PERATION
M
ANUAL
IOA55-1c
August
2009
15
Protection concerns only devices with two optical interfaces, dip switch configuration of 5
and 6 position does not relevant to operation device with only one optical interface
x –Does not affect to configuration
3. Functional Description
The
TR-55 converter
has the following functions:
- sending and receiving data in the RS-232, RS-422, RS-485 standards,
- detecting a break in the optic fibre line,
- converting data received from the optical connector into any standard of those
mentioned above,
- a version with two optical ports enables creating active bus branching through
dividing,
- a two-port version makes enables operation together with data protection in the
point-point configuration and in the „ring” configuration of a closed bus.
Pass-thru versions with two optical ports can work like the one-port version, whereas the
LOOS diode will be on all the time over the unused port.
4. Installation and Maintenance
4.1. Working Conditions
The devices can work continuously in closed rooms in conditions complacent with point
5.3 of
Operation Manual
. They should not be exposed to direct sunbeams. It is unacceptable
to clog ventilation holes.
4.2. Installation
The TR-55 device is adjusted to be mounted on a DIN EN 50 022 bus-bar. However,
mounting is also possible in any position outside the DIN bar.
Before you start installing the device, you should configure it with the DIP-SWITCH.
The way to do it is described in the chapter 2.3 of
Operation Manual.
Having supplied the converter with power the
PWR
and
LOOS
diodes should start, after
the device is well wired the
LOOS
diode should turn off.
Note:
1. It is recommended to connect the ground to the lowest section of the power
connector, especially where are used long wires on electrical interface side.
2. Connecting two-port devices into an optic fibre bus (both closed and open) you
should always connect both fibres from the reception and transmission with one
port of the device; a different setting can interfere with the working of the bus or
if it works in the ring configuration, the lack of protection may occur.
3. In case of the lack of signal from the optical path, the device’s electrical port will
be deactivated. If signal appears at the optical path, it will configure the electrical
port automatically.
