. Overview & Function
The PSM-ME-RS485/RS485-P is a compact repeater / interface device intended for RS-485 2-wire bus systems.
Its primary purpose is to provide electrical isolation (3-way) and signal regeneration / range extension / bus segmentation in RS-485 networks.
It is designed to be mounted on DIN rails in control cabinets, providing a slim, modular solution for communication network robustness.
It includes plug-in screw terminals for field wiring and supports built-in termination resistors to simplify bus integration.
It also carries shipbuilding approvals (DNV-GL) for use in marine or offshore applications.
2. Key Specifications & Performance
Below are major technical data points and performance attributes of the PSM-ME-RS485/RS485-P:
| Parameter | Value / Description |
|---|---|
| Product type | RS-485 2-wire repeater / interface device |
| Isolation | 3-way isolation between: supply, RS-485 side A, RS-485 side B |
| Maximum data rate | Up to 1.5 Mbps |
| Supply voltage range | 18 V to 30 V (AC or DC) |
| Nominal supply voltage | 24 V (AC/DC) |
| Typical current consumption | ~ 90 mA at 24 V |
| Maximum current consumption | ~ 100 mA |
| Power dissipation (typical) | ~ 2.16 W under nominal conditions |
| Test (isolation) voltage (interface/power) | 1.5 kV, 50 Hz, 1 minute |
| Operating temperature | –40 °C to +70 °C |
| Storage temperature | –40 °C to +85 °C |
| Humidity (operational) | 10 % to 95 % (non-condensing) |
| Altitude | Up to 5000 m (per manufacturer’s guidelines) |
| Degree of protection | IP20 |
| Dimensions / Mounting | Slim width (~22.5 mm), DIN-rail mounting |
| Termination resistors | Integrated, connectable (for RS-485 line termination) |
| Reliability / MTBF | Rated in the range of hundreds to thousands of years (based on usage conditions) |
| Transport / Handling | Rated for industrial environment / vibration conditions |
| EMC & Surge Protection | Surge suppression built in, conforms to industrial EMC standards. |
| Certifications / Approvals | Shipbuilding classification (DNV-GL), industrial use approvals |
