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Interface converters USB ↔ RS-485 PI1 and PI2
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Interface converters USB ↔ RS-485 PI1 and PI2
Interface converters USB ↔ RS-485 are designed for configuring thr annunciator EKRAN-INFO and communication with the FACP Dozor-1A with the PC for setting it up and for transfer (reading and recording) of data when working with different applications. The following functions are available for the user:
- Recording the created confiduration into the annunciator EKRAN-INFO or the FACP Dozor-1A
- Reading the existing configurations in the device or the annunciator
- For FACP Dozor-1A, reading the event log, monitoring the system status, firmware upgrading
PI1: connection of one or a group of Dozor-1A devices to PC in order to work with the software. The PI1 unit is connected directly to the device’s terminals. The communication line between the PI1 and the PC may be several meters long (1-2 m).
The inverter PI2 differs from the PI1 by its galvanic separation, owing to which communication is much more jam-resistant, and which allows laying the lines (RS-485) from the FACP-1A to the PI2 up to several kilometers long.
Interface converters USB ↔ RS-485 PI1 and PI2 diagram:
Diagram of connection of the PI1 and PI2 to the annunciator EKRAN-INFO and the FACP Dozor-1A:
| power supply | from USB port |
| maximum current consumption, mA | 80 |
| levels and output capacity of the RS-485 line | USB standard |
| max. overall dimensions of the PI-1, mm | 70х20х15 |
| max. overall dimensions of the PI-2, mm | 90х60х22 |
| max. weight of the PI-1 unit, kg | 0.1 |
| max. weight of the PI-2 unit, kg | 0.2 |
| lifetime, min., years | 10 |
| warranty period, years | 5 |
Both inverters are powered by the PC via USB cable. When connecting the inverter to the PC, it is necessary to install the drivers suitable for its operation. Download drivers USB-RS485 for the PI1 and PI2 (zip, 850 kb) (Source: www.ftdichip.com). Please, note that installation of the driver is a two-step procedure and when it is completed, a new COM port will apprear in the system. Indicate this port in the application software.
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PI1 and PI2
