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Document 50581 Rev A 12/9/96 P/N 50581:A
SW1 DIP Switch Settings
The OPEN position on SW1 is the OFF state. Refer to Figure 1-2 for an explanation of
DIP switch positions. SW1 switch settings are as follows:
1 through 6 - LED10 address switches.
The first six switches are used to set the address of the LED-10N. The OFF
(OPEN) up position equals a binary 1 and the ON down position equals a
binary 0. Refer to Table 1-1 for information on setting these switches for
specific addresses. Each LED-10N connected to the EIA-485 communication
bus must have a unique address.
7 - Not used
8 - ON = Receive/Transmit, OFF (OPEN) = Receive Only
Switch 8 set to ON position enables Receive/Transmit mode for the LED-10N
annunciator. This allows the LED-10N to receive and display system status
information and to transmit system control data such as Acknowledge/Step,
Reset, Signal Silence and Drill. Switch 8 set to the OFF position enables
Receive Only mode which allows the LED-10N to receive and display system
status information but prevents control button operation and supervision status
from being transmitted back to the FACP. To ensure LED-10N supervision and
control button capability, each LED-10N connected to the EIA-485 communica-
tion bus must have a unique address and should be set to enable Receive/
Transmit Mode.
Figure 1-2: SW1 DIP Switch Settings Example
NOTE - SW1 DIP switch settings as illustrated in Figure 1-2 are as follows:
1) DIP switches 1 - 6: Address 08 (see Table 1-1).
2) DIP switch 7: Not used.
3) DIP switche 8: ON = Receive/Transmit
DOWN POSITION = ON
UP (OPEN) POSITION = OFF
General Information
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