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Honeywell DC1020CL
Honeywell DC1020CL
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ALSTOM DCC2382A 3EST125-975
ALSTOM DCC2382A 3EST125-975

BOMBARDIER DCC2223A 3EST125-977

Product Introduction:​ A vital I/O and logic-processing module within Bombardier’s MITRAC TCMS, used on TRAXX locomotives, ALP-46/ALP-45DP multiple units. Handles digital I/O management, MVB communication, and participates in traction/brake coordination.
Technical Specifications:
  • Part No.:​ 3EST125-977
  • Processor:​ Real-time microprocessor (some versions dual-core PowerPC)
Category:
Description
  • Memory:​ 1 GB SDRAM + 512 MB Flash (variant dependent)
  • Supply Voltage:​ 72–110 V DC nominal (train battery), some variants 24 V DC
  • Communication:​ MVB (Multifunction Vehicle Bus) Class 4 per IEC 61375; RS-485 service port
  • Control Cycle:​ ≤ 20 ms (typical)
  • Operating Temp.:​ -25 °C to +70 °C (EN 50155 Class T3)
  • Standards:​ EN 50155, EN 50121-3-2 (EMC), EN 45545-2 (fire), SIL 2 (EN 50128)
  • Vibration:​ IEC 61373 Category 1 Class B
  • Mounting:​ 19″ sub-rack or DIN-rail in enclosed cabinet; IP20 (cabinet), some ruggedized versions IP67
  • Diagnostics:​ Onboard LEDs, non-volatile fault log with timestamps
Key Features:
  • Seamless integration with MITRAC DCU, ACU, and central CCU
  • Hot-standby / redundant bus support on MVB
  • Event recording for post-incident analysis
Applications:​ TRAXX AC2 / DC locomotives, ALP-45DP dual-power locomotives, metro/DMU TCMS local I/O nodes.
Installation Notes:​ Verify 110 V DC supply polarity & fusing; secure MVB terminators; download/config via MITRAC Service Tool; do not mix with unapproved 3EST variants on same backplane.
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