Magnum 6KM Mobile Ethernet Switch Installation and User Guide | 07/10 |
5.1.2 | 6KM4-4M12, 4 x 10/100Mb M12 (Slot C) | |
The 6KM4-4M12 4-port Copper module provides four 10/100Mb switched M12 ports. The 10/100Mb switched ports normally (as a default setting) are independently N-way auto-negotiating and auto-crossover (MDIX) for operation at 10 or 100Mb speed in full- or half-duplex mode. (i.e., each independently selects a mode and speed to match the device at the other end of the twisted pair cable).
(for auto-negotiation and MDIX details, see Section 4.2 in this 6KM User Guide). On the model 6KM4-4M12 module, there is one LED for each port. The
Link/A LED indicates Link “ready for operation” for that port when lit. The A (Activity) LED indicates receiving Activity on that port when blinking. A twisted pair cable must be connected into an M12 port and the Link indicator for that port must be ON (indicating there is a powered-up device at the other end of the cable) in order for a Link LED to provide valid indications of operating conditions on that port.
Using the 6K (MNS-6K or MNS-6K-SECURE) management software, the user may disable auto-negotiation and fix the desired operation of each M12 port. The user may select 10Mb or 100Mb speed and full- or half-duplex mode per-port as per user requirements. (See Magnum MNS-6K Software Manual for additional info)
NOTE: for Power Substations: In support of the IEEE 1613 Class 2 standard, GCI advises that, for substation applications, the M12 ports are intended for connectivity to other communication equipment such as routers or telecommunication multiplexers installed in close proximity (i.e., less than 2 meters or 6.5ft) to the 6KM. It is not recommended to use these ports in substation applications to interface to field devices across distances which could produce high (greater than 2500V ) levels of ground potential rise (GPR) during line-to-ground fault conditions. The 6KM passes the 1613specifications for zero packet loss with fiber ports and with M12 ports used as indicated here.
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