Bus Extender Unit Module IOP371
Metso Automation MAX Controls Inc. • 277596 •
11-13
Detecting Failover Conditions
A Form C relay is provided to indicate a link failure. When a BEM
experiences a failover between the redundant links, a momentary relay
closure occurs. Attach the DI Contact on module front panel to a Digital
Input Module to monitor this logic output. The module produces a logic
output to indicate and report the occurrence of an optical link failover or link
failure.
Use a front panel pushbutton to test the redundant links. The pushbutton
initiates a failover between the two links.
Cabling Recommendations
To augment cable reliability, Metso Automation MAX Controls
recommends the following cabling practices:
For configurations using either single or redundant pairs of BEMs, use two
separate, four-fiber optical cables (Part No. CON064-LLLL). Attach one
cable to Link 1 and the other cable to Link 2. As noted, route cables
separately to minimize the possibility of damage to both cables.
For each link connect two of the four available connector ends to the optical
transceiver connectors. The two extra, unused fibers in each cable serve as
spares in the event that the active fibers are cut or damaged.
Specifications
Model:
IOP371 Bus Extender Module (Part No. 181500)
Distance:
Up to 2000 meters
Speed:
Maintain Model IOP I/O bus communications
I/O addresses:
Up to 255 unique I/O addresses per DPU
Link bus loading:
One of up to 60 I/O nodes
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