Introduction to the SINAUT ST7 system
1.4 The classic SINAUT ST7 modems
Station control system
34
System Manual, 07/2009, C79000-G8976-C178-07
1.4.3
Technical specifications of the SINAUT ST7 modems
Technical specifications of the MD2 dedicated line modem
MD2
Interfaces
•
Attachment to 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
•
100 mA
Power loss
2.4 W
Permitted ambient conditions
•
Operating temperature
•
Transport/storage temperature
•
Relative humidity
•
0 °C t60 °C
•
-40 °C t70 °C
•
Max. 95 % at +25 °C
Construction
•
Module format
•
Dimensions (W x H x D) in mm
•
Weight
•
Compact module for S7-300, double width
•
80 x 125 x 120
•
Approx. 300 g
Degree of protection
IP 20
Transmission path
2-wire, 2 x 2-wire or 4-wire,
twisted pair, without loading coils or with few
loading coils
Type of modulation
•
Frequency shift keying (FSK)
Transmission speeds
•
1200 bps
•
2400 bps
•
9600 bps (not for telephone company
leased lines)
•
19,200 bps (not for telephone company
leased lines)
Mode
•
With 2-wire or 2 x 2-wire
•
With 4-wire
•
Half duplex
•
Duplex or half duplex
Transmit level can be set to
•
0 dB
•
-6 dB
•
-9 dB (for telephone company leased lines)
•
-15 dB
Receive level
0 to -43 dB
