Emerson NT5C06D user manual Control and Alarm Connections, Connecting the DC power shelf

			Installation and start-up 23
Table 4 - DC cable wire size
	1 RECT. POSITION	2 RECT. POSITIONS	3 RECT. POSITIONS
	8 AWG	6 AWG	4 AWG

Figure 6 - Connecting the DC power shelf

Control and Alarm Connections

The rectifier is interfaced to the power plant controller through the signal connectors provided on the backplane of the power shelf (see Figures 1 and 2 for location). These signal connectors provide control, alarm, and monitoring signals.

The power shelf provides two types of signal connectors. One ribbon cable 26-pin female connector, or multiple eight-pin male cable connectors are used to interface the rectifiers to the power plant controller and monitoring unit. The control inputs are activated by a BAT RTN signal. The alarm signals extended by relay contacts are isolated from each other and from the chassis. All contacts are rated 60 V DC and 0.5 A.

Helios Rectifier 25/48 Installation and User Manual