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The Riello MultiCom 352 Serial Duplexer from Critical Power Supplies is a slot-in card that allows two devices to be connected to a single serial port on a Riello uninterruptible power supply.
The duplexer can be used where numerous serial connections and multiple polling of UPS are required, and is ideal for LAN networks with a firewall.
The MultiCom 352 serial duplexer is also available as an external unit – (MultiCom 351).