Description
The IC687RCM711 is a single-slot VME Redundancy Communications Module for ALSPA C80-75 FIP single-rack hot-standby systems. Two modules are required, one for each controller section, and the supported CPUs are the IC697CPX928 and IC697CPX935.
The RCM transmits the synchronization messages used to keep the standby CPU aligned with the active CPU and transfers shared I/O data between the two MFCs. Its high-speed parallel expansion interface provides an effective data rate of 500 kB/s. In a single-rack redundancy configuration, each RCM connects to the IC687BEM713 Bus Transmitter Module in the opposite rack section through an IC697CBL803 terminated cable, with a maximum total interconnection length of 0.9 m (3 ft). The second front connector remains unused and must not be cabled or terminated.
Five front-panel LEDs indicate module health and the ready and active states of the local and remote controllers. A pushbutton allows manual transfer from the active CPU to a ready standby CPU; it must be held for at least one second, and the system enforces a minimum interval of ten seconds between transfers. The module is configured through Windows-based engineering software.
Please check compatibility with the installed hardware and system configuration before ordering.
