Description
ABB NTR002
- Specs:
- Termination: 93 Ω ±1 % (coax Infi-Net) or 120 Ω (STP C.W.)
- Bias: Some versions include fail-safe bias resistors to hold idle line at defined state if all nodes off-line
- Form Factor: Keyed plastic plug (matches C.W. OUT BNC or D-sub style on INNIS21/IMMUI termination block)
- Operating Temp.: –40 °C to +85 °C
- Install: Insert into C.W. OUT port of last I/O/controller rack’s INNIS21 (or into designated termination block TB); verify both A-ring and B-ring have terminator at their respective ends.
- Precaution: Missing or wrong-value terminator causes CRC errors, intermittent dropouts — always verify both ends of C.W. ring are terminated.
B. Turbine / Protection Interpretation (if NTR002 is from RET/REG spare list)
- Brief: In ABB REG216 / RET670 / overspeed protection systems, NTR002 can denote a Trip Relay / Redundancy Test Module — a 2oo3 voted trip amplifier or a contact-monitoring module that supervises trip relay continuity and provides test pushbutton function for proof-testing protection loops.
- Features: Monitors trip relay coil continuity; provides manual test pushbutton (momentarily opens/closes test circuit without issuing trip); LEDs show channel healthy / tripped; interfaces to 110 V DC trip supply.
- Application: Overspeed protection system — each trip channel (A/B/C in 2oo3) has its trip relay; NTR002 supervises and allows test without process shutdown.
- Precaution: Test function must be exercised per SIS proof-test procedure — document result.
