Easy Maintenance
The NA-4020/4021 series network adapter can be expanded by adding up to 32 I/O modules. It can provide spring type, removable terminal blocks (RTBs) that allow you to preserve field wiring before replacing an I/O expansion module. Each I/O expansion module can be replaced quickly and easily.
Specifications
- Serial Interface:
• NA-4020: 1 RS-485-2w terminal block port
• NA-4021: 1 RS-232 DB9 female port
- Parity: None, Even, Odd
- Data Bits: 7, 8
- Stop Bits: 1, 2
- Baudrate: 1200 to 115200 bps
- Protocols: Modbus/RTU (slave), Modbus/ASCII (slave)
- Input Voltage: 11 to 28.8 VDC
- Input Current: 70 mA @ 24 VDC
- Current for I/O Modules:
- 1.5 A (max.) @ 5 VDC
- Weight: 150 g (0.33 lb)
- MTBF (mean time between failures)
• NA-4020 Time: 4,694,800 hrs
• NA-4021 Time: 5,208,300 hrs
- Standard: Telcordia SR33
Ordering Options
| Manuf. Part No | | Part Description | |
| NA-4020 | | RS-485 Remote I/O network adaptor (Modbus) |
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| NA-4021 | | RS-232 Remote I/O network adaptor (Modbus) |
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