Product catalog
PML/1 – RS485 isolated repeater – Low voltage
0,00 €
PML/1 is an industrial 400 V-isolated RS485 repeater, powered by a low voltage supply.
It accepts a wide range of AC and DC voltages, and it is completely Plug&Play, since it does not need any driver nor DIP switch. Both the non-isolated RS485 and the 400 V-isolated RS485 are Half Duplex. The RS485 serial repeater automatically detects data direction and transmission data rate up to 250 kbps, so it can be easily installed in any new or existing network.
Thanks to its compact 1-module DIN rail housing, it can be easily mounted in an electrical panel.
Description
PML/1 is an industrial 400 V-isolated RS485 repeater, powered by a low voltage supply. It can be used to isolate two sections of a heavily disturbed serial communication, or to regenerate a signal in case of long distance communication. Thanks to its compact 1-module DIN rail housing, it can be easily mounted in an electrical panel. It accepts a wide range of AC and DC voltages, and it is completely Plug&Play, since it does not need any driver nor DIP switch. Both the non-isolated RS485 and the 400 V-isolated RS485 are Half Duplex. The RS485 serial repeater automatically detects data direction and transmission data rate up to 250 kbps, so it can be easily installed in any new or existing network.
Use cases
Serial repeaters are typically used to regenerate the signal in a RS485 low voltage network, and isolate a disturbed device or section at the same time. Electromagnetical interferences (EMI) are fairly common in industrial environments, so it is good practice to isolate different sections of a serial RS485 bus. Isolation protects device against possible voltage surges or electromagnetical interferences, but guarantees also signal integrity. In case of heavy electromagnetical interferences, a section of optical fiber is recommended. Furthermore, optical fiber guarantees perfect electrical isolation in case of voltage surges or lightnings.
Versatility
RS485 560 V-isolated serial repeater is also available powered by 230 V mains voltage, or with optical fiber regeneration. Industrial serial repeater PMLP/1 is functionally identical to PML/1, but it is powered by 230 V mains voltage. Alternatively, TSS/1M and TVV/1M optical repeaters with RS485 output are availabe, with synthetic and glass fiber, respectively. TSS/1R and TVV/1F use different serial standards, namely RS232 and RS422, with different combination of optical fibers. Other combinations of serial standard, optical fiber, and power supply, are however available, while special requests (such as higher data rates) can be made via the contact form.
Technical Specifications
Main features
| Power supply | 9 – 24 V AC 48/62 Hz 9 – 30 V DC |
|---|---|
| Power consumption | 1 W |
| Serial transmission data rate | 0 – 250 kbps (automatic) |
| Propagation delay | 600 ns (typical) |
| Isolation voltage | 400 V (DIN EN 60747) – 2500 V for 1 minute (UL 1577) |
RS485
| Communication type | Half Duplex on a balanced line, with automatic data direction |
|---|---|
| Maximum bus voltage | ± 60 V – ESD ± 16.5 kV (Human Body Model) |
| Common mode range | ± 25 V DC |
| Slew rate | Limited, to have an error-free transmission |
Mechanical features
| DIN Rail | 1 module |
|---|---|
| Dimensions | 90 mm x 18 mm x 57 mm |
| Weight | 52 g |
Working conditions
| Degree of protection | IP20 |
|---|---|
| Operating temperature | -20 °C to +50 °C |
| Storage temperature | -40 °C to +80 °C |
