Case Introduction:

There are still some products that have not been listed yet. For more information, please contact us. If the product model does not match the displayed picture, the actual model shall prevail. Please consult us for specific product images; We will arrange for the warehouse to take photos for confirmation. We have 76 shared warehouses worldwide, so it may take several hours to accurately respond to your message. We deeply apologize for any inconvenience caused to you. Of course, we will process your inquiry as soon as possible.

ABB NBIO-21C AC500 PLC Mixed DI/DO AI/AO Universal I/O Module

As core expansion spare of ABB AC500 PLC system, NBIO-21C solves common on-site breakdowns: partial channel no signal collection, analog output drift leading actuator misoperation, digital channel short-circuit triggering PLC abnormal alarm caused by original module aging, internal circuit burnout or isolation component damage. Fully consistent OEM dimension, pin definition and bus protocol, direct plug-and-play replacement without PLC program modification or field rewiring, drastically shorten production line downtime. Two supply options: original factory new with ABB official datasheet; refurbished version after component screening, full-channel signal calibration and 72h continuous rack aging test, both covered unified 12-month global warranty for factory routine spare stocking and urgent breakdown rush procurement.

NBIO-21C

Technical Parameters:

Item	Specification
Model	NBIO-21C
Applicable System	ABB AC500 Series PLC Controller
Channel Configuration	8DI+8DO+4AI+2AO Mixed I/O
Digital Input	24VDC Sink/Source dry contact input
Digital Output	24VDC transistor output, max 0.5A per channel
Analog Input	0~10V,4~20mA,RTD,TC(K/S type),16-bit resolution
Analog Output	0~10V,4~20mA configurable,16-bit precision
Module Supply	24VDC From PLC backplane or external power
Isolation Grade	Per-channel opto-isolation for DI/DO; Galvanic isolation for analog
Installation	Standard 35mm DIN rail mounting
Operating Temp	-25℃ ~ +60℃
Storage Temp	-40℃ ~ +85℃
Ambient Humidity	5%~95%RH non-condensing
Dimension(W×H×D)	102×72×36mm
Net Weight	≈0.32kg
Certification	CE,UL,IEC61131
Typical MTBF	＞920,000 Hours

NBIO-21C

Application Fields:

Petrochemical Plant: Reactor, pipeline auxiliary AC500 PLC signal collection & valve control spare
Thermal Power Auxiliary System: Water treatment, ash handling automation cabinet I/O spare inventory
Packaging & Food Machinery: Production line proximity switch, frequency converter analog control
Metallurgy Equipment: Furnace temperature detection & cooling pump interlock control system
Building HVAC Automation: Air-conditioning temperature/humidity collection and damper actuator control

NBIO-21C

Core Features & Advantages:

All-in-one Mixed I/O Design: Combine DI/DO/AI/AO in single module, save cabinet installation space and reduce spare stock types
Multi-signal Universal Compatibility: Covers mainstream industrial digital & analog signal standards for flexible field matching
Full-channel Isolation Protection: Single channel fault will not affect adjacent channels or main PLC system
Plug & Play Swap: Auto bus identification after replacement, no parameter download required
Compact DIN Rail Layout: Quick installation and on-site replacement, convenient cabinet transformation
Strict Anti-humidity Coated PCB: Three-proof coating adapt dusty, humid industrial workshop environment
New & Refurbished Dual Stock: Separate inventory for bulk project order and emergency rush repair
Full Pre-shipment QC: All goods pass full-channel signal test and long-time load aging inspection

FAQ :

Q1: Which PLC matches ABB NBIO-21C?

A: Exclusively designed for ABB AC500 series PLC CPU, install on standard AC500 backplane rack or standalone DIN rail with external 24V power supply.

Q2: Common failure needing NBIO-21C replacement?

A: Multiple DI channels no input feedback, AO output offset out of tolerance, DO channel no driving output, module power LED off after energized.

Q3: Can NBIO-21C connect PT100 RTD sensor directly?

A: Yes, onboard circuit natively supports PT100 platinum thermal resistance input without extra signal converter.

Q4: Does replacement need reprogram PLC?

A: No, AC500 system automatically identifies module address via backplane bus, no software configuration needed.

Q5: Delivery & Warranty Policy?

A: Global 12-month warranty; DHL/FedEx priority express for urgent maintenance, anti-shock foam + export carton safe packaging.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.