9
ARC-2 and ARC-2i Menu ARCs
6408 216th Street SW
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Mountlake Terrace, WA 98043 USA
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+1.425.778.7728
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+1.425.778.7727
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www.symetrix.co
J10: Baud Rate Select
Jumpered = 38.4 kbps,
Open = 115.2 kbps.
Baud Rate Select
J10 on the Menu ARC sets the RS-485 baud rate for the
device. Jumpered = 38.4 kbps, Open = 115.2 kbps. All
devices on the same RS-485 bus must be set to the same
rate. Additionally, the device hosting the RS-485 bus must
be switched to the appropriate rate. As of this writing, only
SymNet Express devices are capable of hosting a 115k
baud rate. All other Symetrix devices host a 38.4k baud rate.
Refer to SymNet Designer’s Help for information on setting
the RS-485 baud rate.
Note:
the Menu ARC’s faceplate will need to be removed
in order to access this jumper. J10 is just below the menu
display:
Menu ARC DIP Switch Settings
NOTE:
For the sake of space, a small variety of configurations are shown.
A total of 31 devices per RS-485 bus are possible.
ADDRESS 1
ADDRESS 2
ADDRESS 3
ADDRESS 4
ADDRESS 5
ADDRESS 7
ADDRESS 9
ADDRESS 11
ADDRESS 12
ADDRESS 25
Device Addressing
Every RS-485 device (including all Menu ARCs, Modular
ARCs, and Control I/Os) connected to the same RS-485 bus
must be uniquely identified. The Menu ARCs use a bank of
five DIP switches (S4) to designate one of thirty-one device
addresses. Addressing is done in a binary fashion. Some
examples are depicted below:
Baud Rate Select • Sample System Diagram
