New Original Stock Honeywell 900C72R-0100-43 C70R Redundant CPU Controller Module

Product Details

Related Product Model Recommendations

FAQs

Q1: Does the 900C72R-0100-43 support redundant controller operation?
A: Yes. The module supports dual CPU redundant configurations with failover management through the HC900 redundant system architecture. It requires a 900RR0-0001 redundant CPU rack and a 900RSM-0001 redundant switch module for complete redundancy functionality.

Q2: What is the difference between the -43 and -44 revisions?
A: The 900C72R-0100-43 and 900C72R-0100-44 are different hardware revisions of the same C70R CPU class. They share the same functional role but may have firmware or minor hardware differences. For redundant CPU pairs, both modules should match exactly in revision and firmware build.

Q3: What communication interfaces does this module provide?
A: It features dual 10/100 Base-T Ethernet ports for network redundancy and host communication, plus RS-232 / RS-485 serial interfaces supporting Modbus RTU protocol.

Q4: Can the CPU module be replaced while the system remains operational?
A: Hot-swap capability depends on the complete HC900 rack configuration. In properly configured redundant setups, the standby CPU can be replaced while the primary continues running. Always follow Honeywell system maintenance documentation and ESD precautions.

Q5: How does failover work between redundant CPUs?
A: Dual dedicated redundancy links continuously synchronize state memory and database information between the primary and backup CPUs. If the primary detects a fault, the backup assumes complete execution control within a single scan cycle without process disruption.