SIEMENS
7/152
Siemens IK PI · 2015
Industrial Remote Communication
Remote Networks
Modems for the conventional telephone network
MD3 telephone modem
7
■
Technical specifications
■
Ordering data
Article No.
Article No.
Article No.
6NH7810-0AA30
Product-type designation
MD3 telephone modem
Interfaces
• Connection for telephone
network or dedicated line
1 x RJ12
• RS 232 connection
for data terminal equipment
1 x 9-pin Sub-D connector
• RS 485 connection
• for data terminal equipment
1 x 9-pin Sub-D socket
• Connection for supply voltage
1 x 4-pin terminal block
Voltage supply
24 V DC
Current consumption
• from 24 V DC
200 mA
Power loss
4.8 W
Permissible ambient conditions
• Operating temperature
0 °C … +60 °C
• Transport/storage temperature
-40 °C … +70 °C
• Relative humidity
max. 95 % at +25 °C
Design
• Module format
Compact module S7-300,
double width
• Dimensions (W x H x D) in mm
80 x 125 x 120
• Weight
approx. 300 g
Degree of protection
IP20
Transmission path
Analog dial-up telephone network
Dedicated line, 2-wire twisted pair
cable, non-coil-loaded
Available ITU transmission standards
in analog telephone network
• V.22
1 200 bit/s, duplex
• V.22 up to
2 400 bit/s, duplex
• V.32 up to
4 800 bit/s, duplex
• V.32 up to
9 600 bit/s, duplex
• V.32 up to
14 400 bit/s, duplex
• V.34 up to
19 200 bit/s, duplex
• V.34 up to
33 600 bit/s, duplex
Error correction
V.42 and MNP4
Data compression
V.42bis and MNP5
Modem control
AT commands
V.25bis commands
Telephone charge pulse filter
can be set to:
12 kHz
16 kHz
Dial-up procedure
Voice frequency dialing
Pulse dialing
Loop current component
Available; can be connected
and disconnected
Loudspeaker
Available; can be connected
and disconnected
Line matching
600 ohms
Zr (frequency-dependent)
Transmission level can be set to
-10 dB
-15 dB
Asynchronous character format
10 or 11 bits
Standard dedicated-line profiles
300 bit/s (direct)
1 200 bit/s (direct)
2 400 bit/s (direct)
9 600 bit/s (direct)
19 200 bit/s (direct)
19 200 bit/s (buffered)
33 600 bit/s (buffered)
Compatible with SINAUT modems
(as telephone modem)
• MD125
- V.22
1 200 bit/s, duplex
-
V.22 up to
2 400 bit/s, duplex
• MDM2425B DX
-
V.22 up to
2 400 bit/s, duplex
• MD3 (HW version < 4)
- V.22
1 200 bit/s, duplex
-
V.22 up to
2 400 bit/s, duplex
-
V.32 up to
4 800 bit/s, duplex
-
V.32 up to
9 600 bit/s, duplex
-
V.32 up to
14400 bit/s, duplex
Approvals
Europe
U.S.A.
Canada
Recommended line quality
on leased telephone lines
M1020
M1025
Article No.
6NH7810-0AA30
Product-type designation
MD3 telephone modem
MD3 telephone modem
6NH7810-0AA30
For the analog telephone network,
max. 33 600 bit/s;
can also be used as a
dedicated-line modem for a point-
to-point connection,
max. 33 600 bit/s in voice band;
incl. WAN connecting cable
(RJ12 -RJ12/TAE6) with snap-on
TAE6N connector for connecting
the modem to a telephone outlet
(TAE6N or RJ12) or an LTOP
overvoltage protection module
(for dedicated-line operation)
Accessories
Connecting cable
For connecting a TIM with one of the
SINAUT ST7 MD2, MD3 modems
Cable length 1.5 m
• RS 232
6NH7701-4AL
• RS 485 (not for TIM 3V-IE)
6NH7701-4DL
Line transformer
with overvoltage protection
(for dedicated line only)
•
LTOP1
for 2-wire terminal
6NH9821-0BC11
Adapters
6NH7760-0AA
For mounting the MD3 modem
on a 35 mm standard mounting rail
SITOP compact 24 V/0.6 A
6EP1331-5BA00
1-phase power supply
with wide-range input
85 … 264 V AC/110 … 300 V DC,
stabilized output voltage 24 V,
rated output current value 0.6 A,
slim design
© Siemens AG 2014