ABB Bailey NTRO03 Digital Output Relay Termination Unit

FAQ

Q1: What is the ABB Bailey NTRO03 used for?
A: It is a Digital Output Termination Unit used to interface control-system digital outputs with field devices through relay contacts.

Q2: Is NTRO03 an electronic I/O module?
A: No. It is a termination/interface unit used together with the corresponding I/O module.

Q3: What type of signals does NTRO03 handle?
A: It is designed for digital output (DO) signals, with relay contacts providing the field-side switching interface.

Q4: Which systems use NTRO03?
A: It is associated with ABB Bailey INFI 90 / Net 90 / Harmony control systems.

Q5: Does NTRO03 contain relays?
A: Yes. The NTRO03 is identified in supplier listings as a relay-equipped termination unit.

Q6: What is the difference between NTRO03 and NTRO03-A?
A: They are different revisions/versions of the NTRO03 termination-unit family. NTRO03-A should not automatically be treated as a direct replacement without checking the associated I/O module and system configuration.

Q7: Is NTRO03 the same as NTRO02?
A: No. NTRO02 and NTRO03 are different ABB Bailey termination-unit part numbers and should be matched to their specified I/O applications.

Q8: What are the dimensions and weight of NTRO03?
A: A practical reference value is approximately 17.8 × 10.2 × 12.7 cm and 0.5 kg. Exact dimensions and shipping weight may vary by revision and packaging.

ABB Bailey NTRO03

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