Industrial Modem TDW-33 - Industrial Networking Solutions – Industrial Ethernet Switches and Routers
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Industrial Modem TDW-33

Industrial Modem TDW-33

The TDW-33 is a simple industrial modem designed to allow cost effective and simple remote access to legacy serial industrial equipment. The AT command driven modem is capable of synchronising with a wide range of traditional modem negotiation standards providing data rates up to 56.7 kbit/s.

Designed with remote unmanned industrial locations in mind the modem can operate in extremes of temperature and electromagnetic fields. The complete galvanic separation of all interfaces ensures that earth loops and transients do not interfere with communication. To keep visits to the site to a minimum a watchdog monitors the modem ensuring constant readiness, and remote re-configuration means that changes to settings can be handled without a site visit.

Firewalls are not an issue as data does not use the internet and with call back security it is impossible for either accidental or deliberate access to any equipment attached to the modem.

The modem is simple to configure using the Westermo TD-tool software; standard commands can easily be entered, and saved configurations downloaded. RS-232 connections can be made using screw connections as well as the standard D-sub. The modem is designed to be connected to devices with no ability to control dialling so special functions like data dialling and DTR dialling are provided to enable these devices to automatically establish connections.

TDW-33

• Product Description
Status Active
Article number 3619-0001
Ports 1 x RS-232
1 x RS-422/485
1 x ISDN
Description Industrial ISDN Modem
• Standard compliance
ISDN TBR-3
• Reliability prediction
Service life, operating Operating , 10 years
• EMC (Electromagnetic Compatibility)
EN 55024 Immunity IT equipment
EN 55022 Emission IT equipment
EN 61000-6-1 Immunity residential environments
EN 61000-6-2 Immunity industrial environments
EN 61000-6-3 Emission residential environments
EN 61000-6-4 Emission industrial environments
FCC part 15 Class B
EN 50121-4 Railway signalling and telecommunications apparatus
IEC 62236-4 Railway signalling and telecommunications apparatus
• EMC specifications
EN 61000-4-2, ESD Enclosure contact, ± 6 kV
Enclosure air, ± 8 kV
IEC 61000-4-3, RF field AM modulated Enclosure:
20 V/m @ (80 – 2700) MHz
1 kHz sine, 80% AM
ENV 50204, RF field 900 MHz Enclosure, 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
EN 61000-4-4, fast transients Signal ports, ± 2 kV
Power ports, ± 2 kV
EN 61000-4-5, surge Signal ports unbalanced, ± 2 kV line to earth, ± 2 kV line to line
Signal ports balanced, ± 2 kV line to earth, ± 1 kV line to line
Power ports, ± 2 kV line to earth, ± 2 kV line to line
EN 61000-4-6, conducted RF immunity Signal ports, 10 V 80% AM (1 kHz), 0.15 – 80 MHz
Power ports, 10 V 80% AM (1 kHz), 0.15 – 80 MHz
EN 61000-4-8, power frequency magnetic field Enclosure, 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
EN 61000-4-9, pulsed magnetic field Enclosure, 300 A/m, 6.4 / 16 μs pulse
EN 61000-4-11, Voltage dips and interruption AC power ports:
10 & 5 000 ms, interruption
10 & 500 ms, 30% reduction
100 & 1 000 ms, 60% reduction
EN 61000-4-16, Mains freq. 50 Hz Signal ports, 100 V 50 Hz line to earth
SS 436 15 03, Mains freq. 50 Hz Signal ports, 250 V 50 Hz line to line
EN 61000-4-29, voltage dips and interruption DC power ports:
10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
EN 55022, radiated RF emission Class B
FCC part 15, radiated RF emission Class B
FCC part 15, conducted emission AC power ports, class B
EN 55022, conducted emission AC power ports, class B
PSTN, class B
DC power ports, class B
• Safety
Safety UL/IEC/EN 60950-1, IT equipment
EN 60950-1, dielectric strength Signal port to other isolated ports, 2 kVrms 50 Hz 1 min
Power port to other isolated ports:
3 kVrms 50 Hz 1 min
2 kVrms 50 Hz 1 min (@ rated power <60 V)
• Climatic
Temperature, operating –25 to +70°C (–13 to +158°F)
Temperature, storage –40 to +70°C (–40 to +158°F)
Humidity, operating 5 to 95% relative humidity non condensing
Humidity, storage 5 to 95% relative humidity non condensing
• Enclosure
Enclosure 5 to 95% relative humidity non condensing
Dimensions (W x H x D) 34 x 123 x 121 mm (1.33 x 4.84 x 4.76 in)
Weight 0.21 kg
Degree of protection IP 21
Cooling Convection
Mounting Horizontal on 35 mm DIN-rail
• Mechanical
IEC 60068-2-6, vibration Operating:
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC-60068-2-27, shock Operating, 15 g, 11 ms
• Interface specifications, power
Rated voltage 12 to 483427 VAC
Operating voltage 10 to 60 VDC
10 to 42 VDC
Rated current 150 mA @ 12 VDC
70 mA @ 24 VDC
40 mA @ 48 VDC
150 mA @ 12 VAC
70 mA @ 24 VAC
Rated frequency DC: –
AC: 48 – 62 Hz
Inrush current 0.45 A²s
Startup current 0.30 Apeak
Polarity Polarity independent
Isolation to All other ports 3 kVrms 50 Hz 1 min
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm2 (AWG 24 – 12)
Shielded cable Not required
• Public Switch Telephone Network (PSTN)
Electrical specification Public Switched Telephone Network
Data rate 300 bit/s – 33.6 kbit/s
Protocol Bell103, Bell212, V.21, V.22, V.22Bis, V.23C, V.32, V.32Bis, V.34, V.90
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port, 3 kVrms 50 Hz 1 min
RS-232, 2 kVrms 50 Hz 1 min
Connection RJ-11C
Shielded cable Not required
• Interface specifications, RS-232
Electrical specification EIA/TIA-232
Data rate 1 200 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits; Σ 9 – 12 bits
Protocol Transparent
Retiming Yes
Transmission range Cable length ≤15 m / 49 ft
Isolation to Power port, 3 kVrms 50 Hz 1 min
PSTN Line, 2 kVrms 50 Hz 1 min
Connection 9-pin D-sub female (DCE) and Detachable screw terminal (DCE)
Shielded cable Not required
Conductive housing Isolated to all other circuits

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