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ALSTOM NRD108031
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CONSILIUM NSAC-1
CONSILIUM NSAC-1

ALSTOM NRD108031

Product Introduction:
Legacy Alstom digital-input slice for Turbo Generator Protection and Alspa process racks. Marked TRVC070999000 BOTTOM in spare catalogs, indicating bottom-position backplane/board variant. Collects dry/wet contacts from breakers, limit switches, pump aux contacts.
Category:
Description
Technical Specifications (DI function):
  • Channels:​ 16 isolated digital inputs
  • Input:​ Dry contact or 24 V DC wet, logic 1 ≥ 15 V, logic 0 ≤ 5 V, 0–30 V range
  • Isolation:​ Optocoupler, ≥ 500 V AC ch-ground
  • Response:​ ≤ 10 ms with RC filter
  • Backplane:​ Parallel bus to NRD101xxx controller
  • Temp:​ 0–60 °C (control) / −40…+85 °C for rail base variants
  • EMC:​ EN 50121 railway, IEC 60870-5
Mechanical (BOTTOM baseplate interpretation):
  • Role:​ Carrier/backplane providing slots, MVB/Ethernet traces, power distribution to upper function modules
  • Construction:​ Rigid FR4/metal-reinforced plate, vibration-proof rail mount
  • Standards:​ EN 50155 wide-temp variants exist
Features:​ RC + Schmitt trigger input filtering, optical isolation, mix dry/wet wiring.
Applications:​ Thermal/hydro turbine aux relay status, breaker position, valve limit, legacy metro/rail control racks.
Installation Notes:​ Seat firmly in Alstom rack guide; verify BOTTOM vs TOP variant matches rack position; do not hot-swap without controller permission.
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