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
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