This converter converts a V.24 (RS-232) interface into a 20 mA TTY current loop interface bidirectionally. The interference immune TTY signal allows problem-free data transmission over distances of up to 1000 m using a twisted-pair and shielded 4-wire cable.
PSM-ME-RS232/TTY-P
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Interface converter
2744458
Interface converter, for converting RS-232 (V.24) to TTY, with electrical isolation, 2 channels, rail-mountable
Product details
| Note on application | |
| Note on application | Only for industrial use |
| Utilization restriction | |
| EMC note | EMC: class A product, see manufacturer's declaration in the download area |
| Utilization restriction | |
| CCCex note | Use in potentially explosive areas is not permitted in China. |
| Product type | Interface converter |
| Application | RS-232 |
| TTY | |
| MTBF | 1989 Years (Telcordia standard, 25°C temperature, 21% operating cycle (5 days a week, 8 hours a day)) |
| 410 Years (Telcordia standard, 40°C temperature, 34.25% operating cycle (5 days a week, 12 hours a day)) |
| Electrical isolation | VCC // V.24 (RS-232) // TTY |
| Maximum power dissipation for nominal condition | 1.8 W |
| Test voltage data interface/power supply | 2 kVrms (50 Hz, 1 min.) |
| 2 kV AC | |
| Test voltage data interfaces | 2 kV AC |
| Supply | |
| Supply voltage range | 19.2 V AC/DC ... 28.8 V AC/DC |
| Nominal supply voltage | 24 V AC/DC ±20 % (via pluggable COMBICON screw terminal block) |
| Typical current consumption | 75 mA (24 V DC) |
| Protective circuit | Surge protection; Suppressor diode |
| Supply | |
| Tightening torque | 0.56 Nm ... 0.79 Nm |
| Bit distortion | < 5 % |
| Bit delay | < 3 µs |
| Signal | Modbus |
| Transmission channels | 2 (1/1), RxD, TxD, full duplex |
| Data: V.24 (RS-232) interface in acc. with ITU-T V.28, EIA/TIA-232, DIN 66259-1 | |
| Serial transmission speed | ≤ 19.2 kbps |
| Connection method | D-SUB 9 plug |
| Pin assignment | DTE/DCE switchover via switch |
| Transmission length | 15 m (shielded twisted pair) |
| Single-wire/terminal point, flexible | 0.2 mm² ... 2.5 mm² |
| Max. AWG conductor cross section, flexible | 13 |
| Min. AWG conductor cross section, flexible | 24 |
| Protocols supported | transparent protocol |
| Data: TTY interface, CL2 in acc. with DIN 66348-1 | |
| Serial transmission speed | ≤ 19.2 kbps |
| Connection method | Pluggable screw connection |
| Transmission length | 1000 m (shielded twisted pair) |
| Single-wire/terminal point, flexible | 0.2 mm² ... 2.5 mm² |
| Max. AWG conductor cross section, flexible | 13 |
| Min. AWG conductor cross section, flexible | 24 |
| Load/output load current output | ≤ 500 Ω |
| Impedance | ≤ 117 Ω (Output) |
| 126 Ω (Input) | |
| Output current | 2x 20 mA ±10 % (Loop current) |
| Dimensional drawing |
|
| Width | 22.5 mm |
| Height | 99 mm |
| Depth | 118.6 mm |
| Color (Housing) | green (RAL 6021) |
| Material (Housing) | PA |
| Ambient conditions | |
| Degree of protection | IP20 |
| Ambient temperature (operation) | 0 °C ... 55 °C |
| Ambient temperature (storage/transport) | -40 °C ... 85 °C |
| Altitude | ≤ 5000 m (For restrictions, see the manufacturer's declaration for altitude operation) |
| Permissible humidity (operation) | 10 % ... 95 % (non-condensing) |
| CE | |
| Certificate | CE-compliant |
| UL, USA/Canada | |
| Identification | 508 Recognized |
| Class I, Div. 2, Groups A, B, C, D | |
| Class I, Zone 2, AEx nA IIC T4 | |
| Class I, Zone 2, Ex nA IIC T4 Gc X | |
| Corrosive gas test | |
| Identification | ISA-S71.04-1985 G3 Harsh Group A |
| Shipbuilding | |
| Identification | DNV GL |
| Shipbuilding data | |
| Temperature | B |
| Humidity | A |
| Vibration | A |
| EMC | B |
| Enclosure | Required protection according to the Rules shall be provided upon installation on board |
| Electromagnetic compatibility | Conformance with EMC Directive 2014/30/EU |
| Noise immunity | EN 61000-6-2:2005 |
| Noise emission | |
| Standards/regulations | EN 61000-6-4 |
| Electrostatic discharge | |
| Standards/regulations | EN 61000-4-2 |
| Electrostatic discharge | |
| Contact discharge | ± 6 kV (Test Level 3) |
| Discharge in air | ± 8 kV (Test Level 3) |
| Comments | Criterion B |
| Electromagnetic HF field | |
| Standards/regulations | EN 61000-4-3 |
| Electromagnetic HF field | |
| Frequency range | Test Level 3 |
| Field intensity | 10 V/m |
| Comments | Criterion A |
| Fast transients (burst) | |
| Standards/regulations | EN 61000-4-4 |
| Fast transients (burst) | |
| Input | ± 4 kV (5 kHz) |
| Signal | ± 2 kV (5 kHz) |
| Comments | Criterion B |
| Surge current load (surge) | |
| Standards/regulations | EN 61000-4-5 |
| Surge current load (surge) | |
| Input | ± 0.5 kV (2 Ω) |
| Signal | ± 2 kV (42 Ω) |
| Comments | Criterion B |
| Conducted interference | |
| Standards/regulations | EN 61000-4-6 |
| Conducted interference | |
| Comments | Criterion A |
| Voltage | 10 V |
| Emitted interference | |
| Standards/regulations | EN 55011 |
| Comments | Class A, industrial applications |
| Criteria | |
| Criterion A | Normal operating behavior within the specified limits. |
| Criterion B | Temporary impairment to operational behavior that is corrected by the device itself. |
| Mounting type | DIN rail mounting |
UL Recognized
Approval ID: E238705DNV GL
Approval ID: TAA00001KRcUL Recognized
Approval ID: E199827| Nominal voltage UN | Nominal current IN | Cross section AWG | Cross section mm2 | |
|---|---|---|---|---|
| 24 V | 0.075 A |
cUL Listed
Approval ID: E199827UL Listed
Approval ID: E199827
Your advantages
Mounting on standard EN DIN rails
Transmission distances of up to 1000 m in active TTY mode
High-quality 3-way isolation up to 2 kV (VCC // RS-232 // TTY)
In the case of variable cable lengths, the TTY connection on the field side can be established conveniently using plug-in screw terminal blocks
Integrated surge protection with transient discharge to the DIN rail
Conversion of RS-232 TxD/RxD full duplex data signals to the TTY current loop standard
Semi-active, active or passive TTY mode, depending on pin assignment
24 V DC or AC power supply suitable for the control cabinet
Active data transmission indicated by separate data indicators for the transmit and receive channels
RS-232 connection via 9-pos. D-SUB and standard RS-232 cable
Transmission speed of up to 19.2 kbps
Shipbuilding approval in accordance with DNV GL