RS232 <=> RTC<=> RS485
Modem
4
SOCOMEC - Réf. : 874 669 A GB
INTRODUCTION
The modem RS232 <=> RTC <=> RS485 is designed to
satisfy industry’s demands on reliability and functiona-
lity in environments with high levels of interference. It has
an RS232 interface and works as a calling / answering
modem on 2-wire Leased Lines. The product can use
4-wire Leased Lines. It can handle rates up to
115.2 kbit/s on the terminal side and up to 33.6 kbit/s on
the line side.
Specific parameters can also be set in hardware using
DIP-switches.
The modem is equipped with transient protection on the
line side and a “watchdog” that monitors and automa-
tically resets the modem in the event of a fault. These
functions together with the possibility for remote confi-
guration makes the modem perfect for installation at
unmanned sites and prevents the need of costly service
trips.
The modem also has password protection and dial-back
security to ensure that only authorised users can commu-
nicate with the modem.
The modem is intended for mounting on a 35 mm DIN-
rail, where the modem is attached and locked in a single
action.
In the product there is also an RS485 interface allowing
multidrop connections to many types of industrial
equipment.
It also has a single digital input and output. The input
can be used to trigger a number of different user defined
events. The output is a relay that can also be triggered by
a number of different user defined events. Both the digi-
tal input and output are galvanically isolated from the
rest of the modem.
Description
• Extended temperature range -25 °C to +70 °C
• Data rate up to 33.6 kbit / s with Fast Connect
• Terminal rate up to 115.2 kbit / s
• 2-wire Leased Line (also 4-wire Leased Line)
• V.23 HDX with multidrop
• DTR and incoming data dialling
• DIP-switch configuration
• Watchdog
• Secure call back and access
• Industrial environment transient protection on all
interfaces
• Up to 11 data bits
• Tri-Galvanic isolation (interface / line / supply)
• Caller ID presentation and answering
• Remote configuration
• RS485 interface
• Digital I / O
• Dial backup for PSTN and Leased Line
Characteristics
