Emerson NT5C06D user manual DC Circuit Breaker, AC Line Fail Alarm, Sense Fail, Fan Alarm

Installation and start-up 25

Table 6 - Rectifier and Controller interface connections (26-pin connector) ( continued )

Pin #	Designation	Description	Signal
23	DC BRK ALM	DC Circuit Breaker	NC
24	AC FAIL ALM	AC Line Fail Alarm	NC
25	SENSE FAIL	Sense Fail	NC
	ALM
26	FAN ALM	Fan Alarm	NC
	Note:	The normally closeed (NC) annotation signifies that the
		alarm is sent when the contact between the alarm (NC)
		and alarm common is closed (short-circuited). The alarm

RFA (C) and alarm common pins 17 and 18 are floating. These two alarm commons must be connected to the bat RTN at the system level for applications requiring non- floating alarm signals. The rect (1) indicates the rectifier in position (1) located on the right side of the MPS75 shelf.

In applications where no controller is available or desired, the current sharing functions among rectifiers in SLOPE or FORCE mode are still available. The signal cable remote sense connections RC- and RG+ must be connected to the desired remote sensing location ( batteries). In forced share mode, the forced share signal line of each shelf must be connected together in a daisy chain fashion. See Figures 7A and 7B for suggested methods of connecting the signal wire.

Helios Rectifier 25/48 Installation and User Manual