120 I⁄O Extender Modules
Trident Planning and Installation Guide
I⁄O Bus Termination
A terminator consists of a male 9-pin D connector with two 120-ohm resistors
mounted in the boot (or shell) of the connector. When the I⁄O bus length exceeds 6
meters (20 feet), six I⁄O bus terminators should be installed on the open I⁄O bus
connectors on the I⁄O Extender modules at each end of the I⁄O bus.
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DB-9 Plug with Terminato
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