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Flex M Engineered Receiver Instruction Manual

October 2014

Page 27 of 49

4.6.1 RELAY MODULE LED OPERATION

When the Flex M system is supplying power to the Relay module, there is an LED that indicates the

power and communication status of the Relay module.

Figure 23. GEN2 Relay Module LED Placement

 OK LED

o Solid indicates module communication with system is good

o 3 Blinks indicates read/write error to attached CPU module

Additionally, there are 8 LEDs labeled 1 through 8 on the Relay module. When the LED is on, this

indicates that the relay is activated.

4.7 SERIAL COMMUNICATION MODULE

This section is applicable to the following serial communication part number(s):

 25-02-074-809E

The Flex M Serial Communication module allows the communication via RS-232 (2-wire only), RS-422 (4-

wire only), or RS-485 (4-wire only). Any of these interfaces can operate in full duplex, while only RS-232

supports half duplex operation. When operating in full duplex with RS-422 and RS-485, the

communication module must always be the master. The communication module can only operate as a

slave in half duplex mode.

The Serial Communication module also support CAN-BUS 2.0B.

The Serial Communications module number is set by the rotary switch located on the lower left corner of

the board.

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Magnetek Flex 12RS System Informações Técnicas Página 27