Справочник Пользователя для Emerson 48330

8            Chapter 1    System Description 

ACTURA Flex 48330

 

Power System  User Manual 

When SCU communicates with MC through MODEM or ES-MOD, it uses PSTN to 

realize long-distance monitoring. Power supply cables and communication cables 

shall be prepared for the communication through MODEM. 

3. Dry Contacts Output 

SCU has 8 dry-contact outputs. Every dry-contact output has NC (normally closed) 

and NO (normally-open) contacts. Every dry-contact output shall be configured 

before the alarm event occurs. Different dry-contact output can trigger different 

alarms. Once the alarm event occurs, the dry-contact will close or open to generate 

the alarm. 

If the user has other intelligent equipment to be monitored by SCU, the user can 

connect the dry contacts to the interface of the intelligent equipment, and control 

the intelligent equipment through these dry contacts. 

Capacity of dry contacts: 2A@30Vdc; 05A@125Vac;   

Maximum power dissipation: 60W 

In RS232 and MODEM communication modes, the MC can fulfill the following 

functions through SCU: 

1. Remote acquisition of analog and digital values: MC can acquire the real-time 

analog and digital values of DC Power System through SCU; 

2. Remote control functions: MC can shut down the rectifiers, change the boost 

charge status to float charge status (or in reverse), silence the alarm and stop/start 

the battery test through SCU. 

1. Through setting the parameter of “Relate Relay”, the user can configure the 

alarm category for every dry-contact output. Every dry-contact output has been 

configured to correspond to an alarm category before SCU is delivered to 

customer. 

2. SCU has PLC functions in the alarm management. The PLC is to realize simple 

logic operation, i.e. the "And", "Or" and "Not" operations. The PLC inputs are all the 

possible alarm signals, and the PLC outputs can be used to select one of the 8 dry 

contacts. The alarm categories can be configured flexibly for every dry-contact 

output through MC. The PLC settings for every dry-contact have three alarm inputs, 

and two relation flag. The SN of three alarm categories and the mutual logic 

relationships need to be configured. 

PLC can be set to “Disabled”. If PLC functions and alarm co-relation are enabled at 

the same time, the dry contact will act to activate an alarm when any alarm event 

occurs.