4
6610-2203
1.1 Functional description
The TD-34 has various interfaces that will cover most industrial applications.TD-34 is func-
tionally complete industrial modem including alarm handling, leased line to PSTN redundancy,
Industrial Temperature Range, RS-232/422/485 interfaces and a power
supply interface with a wide input voltage range. All functional blocks are illustrated
in the figure below. A more detailed description can be found under chapter 3. Specifications
(page 8–9).
DP
CPU
Memory
ROM & RAM
MCU
Config.
DIP-switch
RS-232
RS-422/485
Leased
Line
Leased
Line
LED’s
+5V
0
IN
Isolated
power supply
Telephone
Line
Telephone
Line
Alarm in
Alarm out
Common
RS-232/V.24
RS-422/485
DAA
TTL
TTL
TTL
DAA
