| Form Factor | Rear-I/O Module (60x31mm2) |
| Function | PHY Transceiver RS-485 (EIA/TIA-485-A) |
| Chip | Maxim MAX1480EA (CU7-1-RS485) oder MAX1490EA (CU7-2-RS485),electrically isolated |
RS-485 Interface
CU7-1-RS485 | 2-Wire line TxD/RxD, driver and receiver connected, operation mode half-duplex, the transmitter (driver) is enabled by signal RTS, receiver has a fail-safe feature if the input is open circuit, external connector D-Sub 9-pos. male |
RS-485 Interface
CU7-2-RS485 | 4-Wire line TxD/RxD, driver and receiver not connected, operation mode full-duplex, the transmitter (driver) is permanently enabled, receiver has a fail-safe feature if the input is open circuit, external connector D-Sub 9-pos. male |
| Data Transfer Rate | 2.5Mbps max. (CU7-1-RS485), 2 x 2.5Mbps max. (CU7-2-RS485) |
| ESD Protection | ±15kV (Human Body Model) |
| Isolation Voltage | ±500V DC max. |
| Failure Protection | Short-circuit current limited, protected against excessive power by thermal shutdown |
| Power Requirements | +5V 0.3A max. |
Temperature
Humidity | Operating temperature 0-70°C (extended temperature range on request)
Relative humidity 5-90% non-condensing |
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Specifications are subject to change without further notice 
