The MD485 is an intelligent RS-485 interface that permits a PC to address and communicate with one or more data loggers over a distance of up to 1200 m. This interface also supports data-logger-to-data-logger communication, callback from a remote data logger, PC-to-printer communications, and digital camera-to-data-logger connections.
The MD485 includes three ports (RS-232, CS I/O, RS-485) for connecting a PC, a data logger, or another MD485. Any two ports can be used at a time.
The MD485 can be configured to provide transparent communications, MD9 emulation, and PakBus networking. Although the MD485 can emulate an MD9, the MD485 can not be added to an existing MD9 network. PakBus networking requires the data loggers to use the PakBus communications protocol. PC400 or LoggerNet software is used to initiate and control the communications link.
| Function | Permits a PC to address and communicate with one or more data loggers over a distance of up to 1,200 m. |
| Transmission Distance or Area | 1,219 m (4,000 ft) Can increase distance by using more MD485s or combining with spread-spectrum radios, Ethernet, or phone. |
| Baud Rates | 1200, 9600, 19.2k, 38.4k, 57.6k, 115.2k bps |
| Voltage | 12 Vdc (from data logger or pn 15966 wall charger) |
| Surge | Complies with IEC61000-4-5, test level 3 (±2 kV, 2 Ω coupling impedance) |
| Operating Temperature |
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| Service Requirements | CABLE2TP two-twisted pair cables must be installed between networked data loggers and base. |
| Maximum Cable Length | 1,219 m (4,000 ft) |
Current Drain
| Standby Mode | 1.2 mA |
| Communicating | 2 to 7 mA |
Power
| Standby Mode | 14.4 mW |
| Communicating | 24 to 84 mW |
ESD
| Air Discharge | Complies with IEC61000-4-2, test level 4 (±15 kV) |
| Contact Discharge | Complies with IEC61000-4-2, test level 4 (±8 kV) |
