Field termination
Provides the termination-side signal path for analog input wiring from the process field.
ABB Ability Symphony Plus · HR Series
ABB NTAI05 Analog Input Termination Unit
A field-side termination point for 15 analog input signals connected to the SPFEC analog input module. This page brings the part identity, signal path, HART extension option and practical replacement checks into one purchasing view.
TypeAnalog Input Termination Unit
Signals15 field inputs
Companion ModuleSPFEC analog input module
SystemSymphony Plus HR Series
Talk to a spare-parts specialistMiya Zheng
Email for quotationsales@amikon.cn
WhatsApp+86 180 2077 6792
01 / Product Fit
Confirm the signal path before you place the order
NTAI05 belongs at the field-termination side of an ABB Harmony / Symphony Plus analog input assembly. The installed SPFEC module and the 15-signal wiring context are the two fastest checks for a correct RFQ.
15-signal interface
ABB identifies 15 field input signals for this termination unit.
SPFEC connection
The documented companion is the SPFEC analog input module in the HR Series.
Process side15 field signals
→
TerminationNTAI05
→
I/O moduleSPFEC analog input
02 / Technical Specifications
Core product data for purchasing and maintenance
| Model | NTAI05 |
|---|---|
| Product type | Analog input termination unit |
| System family | Symphony / Symphony Plus Harmony rack I/O; compatible with INFI 90 OPEN and Symphony Plus rack-based systems |
| Field signal count | 15 analog input signals |
| Analog input module interface | FEC11 or FEC12; the current Symphony Plus catalog identifies the SPFEC analog input module |
| Power requirements | +24 VDC, 20 mA per input |
| Board format | 7 × 7 in square printed circuit board |
| On-board connection hardware | 17 dipshunt sockets, four terminal strips, one cable socket, one 24 VDC Faston connector and one DC common Faston connector |
| Termination cable | NKTU01 (PVC) or NKTU11 (non-PVC) |
| Cable insulation | PVC PLTC: 80°C (176°F) at 300 V; non-PVC PLTC: 90°C (194°F) at 300 V |
| Mounting panel | NFTP01 field termination panel; one NFTP01 accommodates two termination units |
| ABB enclosure references | CAB-01, CAB-04 and CAB-12; NFTP01 installs in standard 438 mm (19 in) enclosures |
| Ambient temperature | 0 to 70°C (32 to 158°F) |
| Relative humidity | 5% to 95% up to 55°C (131°F), noncondensing; 5% to 45% at 70°C (158°F), noncondensing |
| Pollution degree | I |
| Altitude | Sea level to 3 km (1.86 mi) |
| Air quality | Noncorrosive |
| Cooling | No cooling required in ABB Automation cabinets when operated within the stated environmental limits |
| Certifications | CSA certified for ordinary, nonhazardous process-control locations; FM approved as nonincendive equipment for Class I, Division 2, Groups A, B, C and D |
| Optional HART access | NHAI05 HART adapter and a third-party input multiplexer |
03 / Configuration & Wiring
Connection details engineers need before installation
NTAI05 is configured at the termination unit and cabled to the assigned analog input module slot. Record the installed settings before any replacement work.
Match the signal and module
XU1 through XU15 are configured for each signal's power and input type. XU17 is set for the connected module; XU16 is not used.
NKTU01 or NKTU11
J1 connects to the module-mounting-unit backplane slot assigned to SPFEC12. J2 connects to P1 on the termination unit.
E1 and E2 Faston terminals
ABB specifies 14 AWG wiring: E1 to the +24 VDC distribution source and E2 to I/O common.
Mount the board on NFTP01 with two No. 10 thread-forming screws plus the chassis-common screw and lockwasher. Refit the safety shield before returning the assembly to service.
04 / HART Extension
Add HART data access without reterminating the field signals
ABB's NHAI05 adapter provides a hardware path from signals already landed on the Harmony termination unit to a third-party input multiplexer. The multiplexer can then direct HART information to a central computer running asset or field-device applications.
What the optional path adds
- Access to HART process information and primary or secondary device variables.
- No rewiring of the field signals already connected to the Harmony termination unit.
- A connection path to third-party input multiplexers and central computer applications.
05 / Applications & Fault Scenarios
Typical reasons buyers search for NTAI05
Analog input recovery
One or more field inputs are missing, intermittent or unstable and the termination path is being checked alongside the SPFEC module.
Planned shutdown replacement
A maintenance team wants the correct termination unit on site before disconnecting labeled field wiring during a shutdown window.
HART access project
An installed Harmony I/O system needs a route to HART information through an adapter and third-party multiplexer.
06 / Preventive Maintenance
ABB's maintenance checkpoints for the termination path
Every 3 months
Check cabinet air filters, cabinet and termination-unit dust, and the security of signal, power and ground connections.
Every 12 months
Inspect the circuit board, with particular attention to power contacts and edge connectors, and clean where required.
During shutdown
Complete the full preventive-maintenance schedule while power and process conditions permit safe access.
ABB limits repair to termination-unit replacement. Component-level repair can affect performance and certification.
07 / Replacement Preparation
Four checks that reduce replacement time
1Read the complete nameplateConfirm NTAI05 and record any revision or assembly identifiers.
2Record all dipshunt settingsThe replacement unit must reproduce the XU1–XU15 and XU17 configuration.
3De-energize and labelTurn off cabinet and field-device power; mark the E1/E2, P1 and field-terminal connections before removal.
4Protect the I/O moduleRemove the assigned I/O module from its slot before installing or removing its termination cable.
08 / Official Documentation
ABB documents for NTAI05, the HR system and HART option
| Manufacturer | Document | Number / Version | Official link |
|---|---|---|---|
| ABB | S+ Control: NTAI05 Analog Input Termination Unit — User Manual | 2VAA001669, May 2012 | ABB Library record |
| ABB | ABB Ability Symphony Plus Product Catalog | 2VAA005340, Rev. G | Official ABB PDF |
| ABB | ControlIT Harmony HART Adapter — Data Sheet | WBPEEUD250004A0, Rev. A0 | Official ABB PDF |
09 / Supply & RFQ
Amikon Service
InspectionPart identity and agreed test scope
Export packingAnti-static and impact-protective
DOA supportPrompt review with photos and evidence
Warranty & returnsTerms confirmed on the quotation
10 / FAQ
NTAI05 questions from buyers and maintenance teams
What is the ABB NTAI05 used for?
It provides the termination-side signal path between 15 analog field inputs and the SPFEC analog input module.
Which input module is paired with ABB NTAI05?
The user manual identifies FEC11 and FEC12, while the current Symphony Plus catalog identifies the SPFEC analog input module.
What power does ABB NTAI05 require?
ABB specifies +24 VDC at 20 mA per input. E1 is the +24 VDC connection and E2 is I/O common, with 14 AWG wiring specified for both.
How is ABB NTAI05 configured for different signal types?
XU1 through XU15 are set for the power arrangement and input type of each signal. XU17 is configured for the connected module; XU16 is unused.
What should be checked before replacing ABB NTAI05?
Record all dipshunt positions, isolate cabinet and field power, label field wiring and E1/E2 connections, and remove the assigned I/O module before disturbing its termination cable.
Can ABB NTAI05 support access to HART information?
Yes, through the optional NHAI05 adapter and a third-party input multiplexer. ABB states that this path does not require rewiring the field signals already connected to the termination unit.
11 / Multi-brand Spare Parts Also Requested
Independent procurement references
These models are separate sourcing references, not substitutes for NTAI05. Compatibility and stock must be confirmed independently.
210N2272972-01268-6A-IP20311637312863-A01319828-A01332985-C013G3MX2-A4007-ZV13IF722.93IF761.93IF766.93IF771.93IF772.93IF779.9
No interchangeability, migration or replacement relationship is implied by this list.
