Overview
The PSM-ME-RS232/RS485-P bi-directionally converts RS-232 interface signals to the RS-485 2/4-wire and RS-422 standard.
With support for 4-wire balanced full duplex communication, or 2-wire half-duplex, the PSM-ME-RS232/RS485-P is suitable for most applications, including industrial, commercial and any general office computer device. Transmission speeds of 1.2 kbps up to 115.2 kbps can be applied to point-to-point and point-to-multipoint networks.
Use the PSM-ME-RS232/RS485-P in all common bus systems with UART/NRZ data format and character length of 10/11 bits. This is the best “plug and play” solution for converting RS-232 (V.24) to RS-422 (V.11) and RS-485, with electrical isolation.
RS232 to RS485 Converter Features
- RS-422 4-wire for point-to-point operation
- RS-485 2-wire operation, half duplex
- RS-485 4-wire operation, full duplex
- Automatic transmit/receive changeover
- Transmission speed from 1.2 kbps up to 115.2 kbps
- Integrated data indicator for dynamic indication of transmit and receive data
- High-quality 3-way isolation between power supply, V.24 (RS-232), and RS-422/485 for reliable decoupling of the potentials with 1.5 kV
- Integrated surge protection with transient discharge to the DIN rail
- Shipbuilding approval per DNV
Hardware Specs
PSM-ME-RS232/RS485-P Technical Specifications
| Serial interface | |
|---|---|
| Interface 1 | V.24 (RS-232) interface in acc. with ITU-T V.28, EIA/TIA-232, DIN 66259-1 |
| Connection method | D-SUB 9 plug |
| Transmission length | 15 m (shielded twisted pair) |
| Conductor cross section flexible min. | 0.2 mm² |
| Conductor cross section flexible max. | 2.5 mm² |
| Conductor cross section AWG min. | 24 |
| Conductor cross section AWG max. | 12 |
| Pin assignment | DTE/DCE switchover via switch |
| Protocols supported | transparent protocol |
| Serial transmission speed | 1.2; 2.4; 4.8; 7.2; 9.6; 19.2; 31.25; 38.4; 57.6; 75; 93.75; 115.2 kbps |
| Interface 2 | RS-422 interface in acc. with ITU-T V.11, EIA/TIA-422, DIN 66348-1 |
| Connection method | Pluggable screw connection |
| Transmission length | 1200 m (shielded twisted pair) |
| Termination resistor | 390 Ω 150 Ω 390 Ω (Can be connected) |
| Conductor cross section flexible min. | 0.2 mm² |
| Conductor cross section flexible max. | 2.5 mm² |
| Conductor cross section AWG min. | 24 |
| Conductor cross section AWG max. | 13 |
| Protocols supported | transparent protocol |
| Serial transmission speed | 1.2; 2.4; 4.8; 9.6; 19.2; 38.4; 57.6; 75; 93.75; 115.2 kbps |
| Interface 3 | RS-485 interface in acc. with EIA/TIA-485, DIN 66259-1 |
| Connection method | Pluggable screw connection |
| Data direction switching | Automatic control or via RTS/CTS |
| Transmission length | 1200 m (shielded twisted pair) |
| Termination resistor | 390 Ω 150 Ω 390 Ω (Can be connected) |
| Conductor cross section flexible max. | 2.5 mm² |
| Conductor cross section flexible min. | 0.2 mm² |
| Conductor cross section AWG max. | 14 |
| Conductor cross section AWG min. | 24 |
| Protocols supported | transparent protocol |
| Serial transmission speed | 1.2; 2.4; 4.8; 9.6; 19.2; 38.4; 57.6; 75; 93.75; 115.2 kbps |
| Ambient Conditions | |
| Ambient temperature (operation) | -40 °C … 70 °C |
| Ambient temperature (storage/transport) | -40 °C … 85 °C |
| Permissible humidity (operation) | 10 % … 95 % (non-condensing) |
| Altitude | 5000 m (For restrictions see manufacturer’s declaration) |
| Degree of protection | IP20 |
| Noise immunity | EN 50 082-2 |
| General | |
| Electrical isolation | VCC // V.24 (RS-232) // RS-485 |
| Test voltage data interface/power supply | 1.5 kV AC |
| Electromagnetic compatibility | Conformance with EMC Directive 2014/30/EU |
| Net weight | 139.88 g |
| Housing material | PA 6.6-FR |
| Color | green |
| MTTF | 1654 Years (SN 29500 standard, temperature 25°C, operating cycle 21 % (5 days a week, 8 hours a day)) |
| 746 Years (SN 29500 standard, temperature 40 °C, operating cycle 34.25 % (5 days a week, 12 hours a day)) | |
| 310 Years (SN 29500 standard, temperature 40°C, operating cycle 100 % (7 days a week, 24 hours a day)) | |
| Conformance | CE-compliant |
| ATEX | II 3 G Ex nA IIC T4 Gc (Please follow the special installation instructions in the documentation!) |
| UL, USA/Canada | 508 recognized |
| Noise emission | EN 50 081-1 |
| MTBF | 10 Years (Telcordia standard, temperature 40 °C, operating cycle 100 % (7 days a week, 24 hours a day)) |
| Transmission channels | 2 (1/1), RxD, TxD, full duplex |
| Bit delay | ≤ 2.5 µs |
| Bit distortion | ≤ 5 % |
| Test voltage data interfaces | 1.5 kV AC |
| Test voltage data interface/power supply | 1.5 kV AC |
| Degree of pollution | 2 |
| IECEx | Ex nA IIC T4 Gc |
| Power supply | |
| Nominal supply voltage | 24 V AC/DC |
| Supply voltage range | 18 V AC/DC … 30 V AC/DC (via pluggable COMBICON screw terminal block) |
| Typical current consumption | 85 mA (24 V DC) |
| Max. current consumption | 100 mA |
| Conductor cross section flexible max. | 2.50 mm² |
| Conductor cross section flexible min. | 0.20 mm² |
| Conductor cross section solid max. | 2.50 mm² |
| Conductor cross section solid min. | 0.20 mm² |
| Max. AWG conductor cross section, flexible | 12 |
| Min. AWG conductor cross section, flexible | 24 |
| Conductor cross section AWG max. | 12 |
| Conductor cross section AWG min. | 24 |
| Dimensions | |
| Width | 22.5 mm |
| Height | 99 mm |
| Depth | 114.5 mm |
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|
| Environmental Product Compliance | |
| China RoHS | Environmentally Friendly Use Period = 50 |
| Reach and RoHS Compliant | Reach and RoHS Compliant |
| Standards and Regulations | |
| Electromagnetic compatibility | Conformance with EMC Directive 2014/30/EU |
| Free fall | In acc. with IEC 60068-2-32 Result: 1 m |
| Vibration resistance | In acc. with EN 60068-2-6/IEC 60068-2-6 Result: 5g, 10…150 Hz, 2.5 h, in XYZ direction |
| EMC Immunity | EN 61000-4-2: Contact discharge ± 6 kV (Test Level 3) EN 61000-4-3: Frequency range 26 MHz … 3 GHz (Test Level 3) EN 61000-4-4: Criterion B EN 61000-4-5: Signal ± 1 kV (Data line, asymmetrical) EN 55011 EN 61000-4-6: Frequency range 0.15 MHz … 80 MHz |
| Conformance | CE-compliant |
| ATEX | II 3 G Ex nA IIC T4 Gc |
| UL, USA/Canada | 508 recognized |
| Noise emission | EN 50 081-1 |
| Noise immunity | EN 50 082-2 |
| Shock | In acc. with EN 60068-2-27/IEC 60068-2-27 Result: 25g, 11 ms period, half-sine shock pulse |
| Connection in acc. with standard | CUL |
| IECEx | Ex nA IIC T4 Gc |
| UL, USA/Canada | 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 | |
| Approvals | |
| UL Recognized cUL Recognized DNV EAC KC cULus Recognized UL Listed cUL Listed IECEx ATEX cULus Listed |
|
| Commercial data | |
| Packing unit | 1 |
| Weight per piece | 200.0 g |
| Country of origin | Germany |
Application Diagrams
| Point-to-point connection between two RS-232 interfaces via RS-422 |
|---|
Use the RS-422 standard to implement rapid, interference-free point-to-point connections. Connections between two RS232 devices covering up to 1200 m can be established using a shielded, twisted pair 4-wire cable.
 |
| RS232 to RS485 Multipoint |
The RS-485 standard allows more than two devices to communicate with one another. By converting the RS-232 point-to-point interface into the bus-capable RS-485 standard, you can network up to 32 devices via a 2 or 4-wire cable.
 Fig 1. Interface adaptation or programming connection  Fig2. Master interface connection  Fig3. Networking of RS-232 devices |
| Block Diagram |
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