Moxa NA-4021 (RS-232) Series

Ethernet and serial network adaptors.

Moxa NA-4021 (RS-232) Series

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.

How to Order

Step 1:
Select a network adaptor module below

Step 2:
Select I/O modules from the Accessories tab below

Step 3: (optional)
Select power modules from the Accessories tab below

NA-4021
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NA-4021
RS-232 Network Adapter (Modbus)
£ 251.00
£ 301.20 inc VAT
M-1450
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M-1450
I/O Module, 4DI, 110VAC, RTB
£ 47.00
£ 56.40 inc VAT
M-7805
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M-7805
I/O Module, Potential Dist., 8ch, 24VDC
£ 22.00
£ 26.40 inc VAT
M-1801
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M-1801
I/O Module, 8DI, Source, 24VDC, RTB
£ 48.00
£ 57.60 inc VAT
M-2450
In stock
 in the UK
M-2450
I/O Module, 4DO, Relay, 230VAC, 24VDC, 2.0A, RTB
£ 86.00
£ 103.20 inc VAT
M-2600
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M-2600
I/O Module, 16DO, Sink, 24VDC, 0.3A, 20pin
£ 94.00
£ 112.80 inc VAT
M-2601
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M-2601
I/O Module, 16DO, Source, 24VDC, 0.3A, 20pin
£ 94.00
£ 112.80 inc VAT
M-2800
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M-2800
I/O Module, 8DO, Sink, 24VDC, 0.5A, RTB
£ 53.00
£ 63.60 inc VAT
M-2801
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M-2801
I/O Module, 8DO, Source, 24VDC, 0.5A, RTB
£ 53.00
£ 63.60 inc VAT
M-3802
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M-3802
I/O Module, 8AI, 4~20mA, single-ended, 12bit, RTB
£ 225.00
£ 270.00 inc VAT
M-3810
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M-3810
I/O Module, 8AI, 0~10V, single-ended, 12bit, RTB
£ 225.00
£ 270.00 inc VAT
M-4402
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M-4402
I/O Module, 4AO, Current, 4~20mA, 12bit, RTB
£ 222.00
£ 266.40 inc VAT
M-4410
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M-4410
I/O Module, 4AO, Voltage, 0~10V, 12bit, RTB
£ 222.00
£ 266.40 inc VAT
M-6200
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M-6200
I/O Module, 2AI, RTD: PT100, JPT100, RTB
£ 189.00
£ 226.80 inc VAT
M-6201
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M-6201
I/O Module, 2AI, Thermocouple: 30mV (1uV/bit), RTB
£ 189.00
£ 226.80 inc VAT
M-7001
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M-7001
I/O Module, System expansion power supply, 1A (5VDC)
£ 38.00
£ 45.60 inc VAT
M-7002
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M-7002
I/O Module, F. Power Dist., 10A (24/48VDC, 110/220VAC)
£ 22.00
£ 26.40 inc VAT
M-7804
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M-7804
I/O Module, Potential Dist., 8ch, 0VDC
£ 22.00
£ 26.40 inc VAT
M-1601
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M-1601
I/O Module, 16DI, Source, 24VDC, 20pin
£ 80.00
£ 96.00 inc VAT
M-1800
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M-1800
I/O Module, 8DI, Sink, 24VDC, RTB
£ 48.00
£ 57.60 inc VAT
M-1451
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M-1451
I/O Module, 4DI, 220VAC, RTB
£ 47.00
£ 56.40 inc VAT
M-1600
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M-1600
I/O Module, 16DI, Sink, 24VDC, 20pin
£ 80.00
£ 96.00 inc VAT

Please note that stock levels and lead times are estimates only.