Emerson 48330 user manual 3 SCU, Function of indicators, Normal Abnormal Cause of abnormality

Chapter 1 System Description 7

Table 1-3 Function of indicators

LED	Normal	Abnormal		Cause of abnormality
Power indicator (green)	ON	OFF	No AC Mains Supply
		Blinking		Rectifier is under control by SCU
Protection indicator		ON		AC input over/under voltage, PFC
	OFF			over/under voltage and over temperature
(yellow)
		Blinking		Communication of rectifier with SCU failure
Alarm indicator (red)	OFF	ON		Output Over-voltage
		Blinking	Fan Failure

1.5.3SCU

Outline

Figure 1-5 Outline of SCU

Dimension (H % W % D):132mm % 85mm % 287mm

Weight: 0.76kg

Multi-Communication mode

SCU communicates with MC (Main Computer) through the RS232/MODEM communication port and 8 groups of alarm dry contacts on the Signal Junction Board.

SCU supports both China Telecom Communication Protocol and EEM Protocol. Make sure that the baud rates for receiving and transmitting are set to be consistent when using SCU.

1. Communication through RS232

RS232 communication mode is mainly used for short-distance point-to-point communication. The communication distance shall be less than 15m. If SCU communicates with MC through RS232, just connect SCU RS232 port to the RS232 port of MC.

2. Communication through MODEM or ES-MOD

ACTURA Flex 48330 Power System User Manual