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, DIN-rail mountable. Product is being prepared for compliance with the Cyber Resilience Act (CRA).
Product details
| Note on application | Only for industrial use |
| Note on application | As things stand now, we are preparing the product so that, as of December 11, 2027, it will comply with the requirements of the EU Cyber Resilience Act (CRA) based on the information currently available regarding the CRA. |
| 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 |
| Mounting position | On horizontal DIN rail |
UL Recognized
Approval ID: E238705DNV GL
Approval ID: TAA00001KR_7cUL Recognized
Approval ID: E199827| Nominal voltage UN | Nominal current IN | Cross section AWG | Cross section mm2 | |
|---|---|---|---|---|
| keine | ||||
| 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