ABB DSAI 155A 3BSE014162R1 Output electronic card

The X1-Port (backplane connector) of the ASM 420 has multiple functionalities. Details are described in the original literature: Technical Description Identsystem MOBY-I, Interface Module ASM 420, Publication No. 6GT2097-3AF00-0DA2. In our case we use only the connections for the power supply and the RS-422 interface to realize our peer-to-peer connection to the MVI46-3964R. The switch bank (S1) is for setting the mode. For a detailed description of the possible modes, please refer to the technical description mentioned above.The switches 1 & 2 determine the baud rate of the ASM 420. 9600 Baud is configured in our case.

These parameters have to be fixed

for the MVI46-3964R to operate with the ASM 420. The switches 3-6 select 3964R as the standard communication procedure. There is no other choice in our case, because 3964R is the only procedure offered by the MVI46-3964R. Adjusting high/low priority is not relevant, because the data exchange between the ASM 420 and the MVI46-3964R is synchronized (Refer to Using the Moby Instruction Set). The ASM 420 will be set to "low priority". The switches 7 & 8 determine the mode of control of the MDS through the ASM 420. All possibilities mentioned in the technical description can be chosen according to your requirements. "Proximity detection in SIM firmware" is our example choice.

Pinout Connections ASM 420 

The following illustration shows the pins of the ASM 420 (X1-Port) and the MVI46-3964R used for a RS-422 connection. The ASM 420 needs an external 24V DC power supply for operation.The cable must be made according to the RS-422 specifications. In addition to this, you should also check your (ground) cabling to avoid ground loops.Implementation in the SLC processor example program: RESET without parameters. If parameters are required the instruction has to be changed accordingly.

 Brand display

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