Modular I/O NA-4020/NA-4021 Moxa vietnam



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. 

Dimensions (unit = mm)

Common Specifications
Field Power
Rated Voltage 11 to 28.8 VDC, 24 VDC typical
Current in Field Power Contact Max. 10 A
System Power to I/O Driver Optical isolation
Physical Characteristics
Dimensions 45 x 99 x 70 mm (1.77 x 3.90 x 2.76 in)
Weight 150 g
Mounting DIN rail
Environmental Limits
Operating Temperature -10 to 60°C (14 to 140°F)
Storage Temperature -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Altitude Up to 2000 m
Note Please contact Moxa if you require products guaranteed to function properly at higher altitudes.
Standards and Certifications
Safety UL 508
EMI 61000-3-2; EN 61000-3-3; EN 61000-6-4; FCC Part 15, Subpart B, Class A
EMS EN 61000-4-2, EN 61000-4-3, EN 61000-4-4, EN 61000-4-5,
EN 61000-4-6, EN 61000-4-8, EN 61000-4-11, EN 61000-6-2
Vibration IEC-68-2-6 (2 g's during operation)
Warranty Period 2 years
NA-4020/4021 Specifications
Serial Communication Parameters
Parity None, Even, Odd
Data Bits 7, 8
Stop Bits 1, 2
Baudrate 1200 to 115200 bps
Signals • NA-4020: Data+, Data-, Gnd, DIR (5-contact terminal block)
• NA-4021: TxD, RxD, Gnd (9-pin D-Sub female)
Software Features
Protocols Modbus/RTU, Modbus/ASCII
Modbus Address 00 to 99 (set by rotary switches)
Programming Library MXIO DLL library for Windows; Supports Visual Basic, Visual C++, Borland C++ Builder, .net, VB/VC.NET
Number of I/O Modules Supported Max. of 32
Power Requirements
Power Input 11 to 28.8 VDC, 24 VDC typical
Power Consumption 70 mA @ 24 VDC
Current for I/O Modules Max. 1.5 A @ 5 VDC
MTBF (mean time between failure)
Time NA-4020: 4,695,360 hrs
NA-4021: 4,721,640 hrs
Database Telcordia (Bellcore)