Introduction to the SINAUT ST7 system
1.4 The classic SINAUT ST7 modems
Station control system
System Manual, 07/2009, C79000-G8976-C178-07
35
MD2
Terminating resistor can be adjusted
•
For 1200 and 2400 bps
•
For 9600 and 19,200 bps
•
For tapping point
•
600 ohms
•
150 ohms
•
> 6 kilohms
Ready to send
•
At 1200 bps
•
At 2400 bps
•
At 9600 and 19,200 bps
•
After 7 ms
•
After 4 ms
•
After 0.5 ms
Lower / upper keying frequency
•
At 1200 bps
•
At 2400 bps
•
At 9600 and 19,200 bps
•
1300 Hz / 2100 Hz
•
2400 Hz / 3300 Hz
•
20,800 Hz / 33,600 Hz
Asynchronous character format
10 or 11 bits
Floating optical relay output
•
Max. connected voltage
•
Max. permitted permanent current
•
Max. R
on
•
60 V AC/DC
•
400 mA
•
3 ohms
Surge withstand capability
U
1.2/50
to DIN VDE 0804
between supply circuit and
•
FSK remote line circuits
•
Optical relay output
•
2.5 kV
•
2.5 kV
Compatible with SINAUT modems
•
MD100
•
MD124
•
At 1200 bps
•
At 1200, 2400 and 19,200 bps
Certifications and approvals
EU approval CE 0682 X
Technical specifications of the MD3 analog dial-up modem
MD3
Interfaces
•
Attachment to telephone network or dedicated
line
•
RS-232 attachment to DTE
•
RS-485 attachment to DTE
•
Connection to power supply
•
RJ-12
•
9-pin D-sub male connector
•
9-pin D-sub female connector
•
4-pin terminal strip
Power supply
24 V DC
Current consumption
•
From 24 V DC
•
200 mA
Power loss
4.8 W
