Comtech EF Data SMS-758, Инструкция по установке и эксплуатации

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SMS-758 Modem Protection Switch Theory of Operation
MN/SMS758 Rev. 3 4–3
4.1.3 Remote Baud Rate
The eight position switch pack, SP1, on the M&C module programs the external remote
serial communications baud rate and parity. Set the switches to ON (nearer the PCB) or
OFF (away from the PCB) to select parity and baud rate.
SP1 switch position 1 (SP1-1) sets the parity:
•
“OFF” for even parity
•
“ON” for odd parity
SP1 switch positions 2, 3, and 4 (SP1-2, SP1-3, and SP1-4) set the baud rate as follows:
Baud SP1-2 SP1-3 SP1-4
110 ON ON ON
150 ON ON OFF
300 ON OFF ON
600 ON OFF OFF
1200 OFF ON ON
2400 OFF ON OFF
4800 OFF OFF ON
9600 OFF OFF OFF
4.1.4 Remote Address
The switch connects to an RS-485 remote communication link. To communicate on this
link, each unit must have a unique address between 1 and 255. (0 cannot be a device
address, as it is the global address for all devices.) To set an address, use the 8-position
switch pack, SP2, on the M&C module.
Addresses are binary coded numbers:
•
Switch position 1 (SP2-1) is the most significant bit.
•
Switch position 8 (SP2-8) is the least significant bit.
To turn ON any switch, move it to the position closer to the PCB. For example:
Address SP2-1 SP2-2 SP2-3 SP2-4 SP2-5 SP2-6 SP2-7 SP2-8
1 OFF OFF OFF OFF OFF OFF OFF ON
3 OFF OFF OFF OFF OFF OFF ON ON
5 OFF OFF OFF OFF OFF ON OFF ON
9 OFF OFF OFF OFF ON OFF OFF ON
17 OFF OFF OFF ON OFF OFF OFF ON
33 OFF OFF ON OFF OFF OFF OFF ON
65 OFF ON OFF OFF OFF OFF OFF ON
129 ON OFF OFF OFF OFF OFF OFF ON
255 ON ON ON ON ON ON ON ON