Industrial Telephone 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.

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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.

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Technical data

TDW-33

Product description
StatusActive
Article number3619-0001
Ports1 x Public Switched Telephone Network (PSTN)
1 x RS-232
DescriptionIndustrial Telephone Modem
Warranty period5 Years
Standard compliance
PSTNCS 03 Part 1, issue 9
FCC part 68, TIA-968-A
ETSI TS103 021-1, ETSI TS103 021-2, ETSI TS103 021-3
AS/ACIF S002, AS/ACIF S006
Reliability prediction
Service life, operatingOperating, 10 year
EMC (Electromagnetic Compatibility)
EN 55024Immunity IT equipment
EN 55022Emission IT equipment
EN 61000-6-1Immunity residential environments
EN 61000-6-2Immunity industrial environments
EN 61000-6-3Emission residential environments
EN 61000-6-4Emission industrial environments
FCC part 15Class B
EN 50121-4Railway signalling and telecommunications apparatus
IEC 62236-4Railway signalling and telecommunications apparatus
EMC specifications
EN 61000-4-2, ESDEnclosure contact, ± 6 kV
Enclosure air, ± 8 kV
IEC 61000-4-3, RF field AM modulatedEnclosure:
20 V/m @ (80 – 2700) MHz
1 kHz sine, 80% AM
ENV 50204, RF field 900 MHzEnclosure, 20 V/m pulse modulated 200 Hz, 900 ± 5 MHz
EN 61000-4-4, fast transientsSignal ports, ± 2 kV
Power ports, ± 2 kV
EN 61000-4-5, surgeSignal 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 immunitySignal 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 fieldEnclosure, 100 A/m, 50 Hz, 16.7 Hz & 0 Hz
EN 61000-4-9, pulsed magnetic fieldEnclosure, 300 A/m, 6.4 / 16 μs pulse
EN 61000-4-11, Voltage dips and interruptionAC 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 HzSignal ports, 100 V 50 Hz line to earth
SS 436 15 03, Mains freq. 50 HzSignal ports, 250 V 50 Hz line to line
EN 61000-4-29, voltage dips and interruptionDC power ports:
10 & 100 ms, interruption
10 ms, 30% reduction
10 ms, 60% reduction
+20% above & –20% below rated voltage
EN 55022, radiated RF emissionClass B
FCC part 15, radiated RF emissionClass B
EN 55022, conducted emissionAC power ports, class B
PSTN, class B
DC power ports, class B
FCC part 15, conducted emissionAC power ports, class B
Safety
EN 60950-1, dielectric strengthSignal 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)
SafetyUL/IEC/EN 60950-1, IT equipment
Climatic
Temperature, operating–25 to +70°C (–13 to +158°F)
Temperature, storage–40 to +70°C (–40 to +158°F)
Humidity, operating5 to 95% relative humidity non condensing
Humidity, storage5 to 95% relative humidity non condensing
Enclosure
EnclosureUL 94, PC / ABS, flammability class V-1
Dimensions (W x H x D)34 x 123 x 121 mm (1.33 x 4.84 x 4.76 in)
Weight0.21 kg
Degree of protectionIP 21
CoolingConvection
MountingHorizontal on 35 mm DIN-rail
Mechanical
IEC 60068-2-6, vibrationOperating:
7.5 mm, 5 – 8 Hz
2 g, 8 – 500 Hz
IEC-60068-2-27, shockOperating, 15 g, 11 ms
Interface specifications, power
Rated voltage12 to 483427 VAC
Operating voltage10 to 60 VDC
10 to 42 VDC
Rated current150 mA @ 12 VDC
70 mA @ 24 VDC
40 mA @ 48 VDC
150 mA @ 12 VAC
70 mA @ 24 VAC
Rated frequencyDC: –
AC: 48 – 62 Hz
Inrush current0.45 A²s
Startup current0.30 Apeak
PolarityPolarity independent
Isolation toAll other ports 3 kVrms 50 Hz 1 min
ConnectionDetachable screw terminal
Connector size0.2 – 2.5 mm² (AWG 24-12)
Shielded cableNot required
Public Switched Telephone Network (PSTN)
Electrical specificationPublic Switched Telephone Network
Data rate300 bit/s – 33.6 kbit/s
ProtocolBell103, Bell212, V.21, V.22, V.22Bis, V.23C, V.32, V.32Bis, V.34, V.90
ProtectionInstallation Fault Tolerant (up to ±60 V)
Isolation toPower port, 3 kVrms 50 Hz 1 min
RS-232, 2 kVrms 50 Hz 1 min
ConnectionRJ-11C
Shielded cableNot required
Interface specifications, RS-232
Electrical specificationEIA/TIA-232
Data rate300 bit/s – 115.2 kbit/s
Data format7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits; 9-12 bits
ProtocolTransparent
RetimingYes
Transmission rangeCable length ≤ 15 m
Isolation toPower port, 3 kVrms 50 Hz 1 min
PSTN Line, 2 kVrms 50 Hz 1 min
Connection9-pin D-sub female (DCE) and Detachable screw terminal (DCE)
Connector sizeDetachable screw terminal 0.2 – 2.5 mm² (AWG 24 – 12)
Shielded cableNot required
Conductive housingIsolated to all other circuits

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Industrial Telephone Modem

TDW-33