46210/46220-0998 <90-00036> PAGE 17
When using DCM protocol, the starting address set with switch
S1 determines the addresses for all the alarm points on the
block. Sixteen alarm points are assigned to each address. There-
fore, the 46210 Alarm Block, which has 256 alarm points,
requires 16 addresses (16 x 16 = 256). If the starting address is
17, the DCM addressing for a 256-point block would be ad-
dresses 17 through 32. The following table shows the number of
addresses required for each type of block.
BLOCK
46210
46220-00
46220-01
ADDRESSES REQUIRED
16
8
12
TOTAL ALARM POINTS
256
128
192
The highest address that can be used is 128, which is a limita-
tion of the DCM protocol. Thus, the highest starting address for
a 256-point block would be 113 (113 through 128 = 16 ad-
dresses). If an address higher than 113 is used, addresses above
128 will not be polled. The following table shows the highest
starting address for each type of block.
BLOCK
46210
46220-00
46220-01
HIGHEST STARTING ADDRESS
113 (113 + 15 more addresses = 128)
121 (121 + 7 more addresses = 128)
117 (117 + 11 more addresses = 128)
ADDRESSES REQUIRED
16
8
12
The same starting address that is used for alarms also is used
for controls. The 46220-01 has 16 controls. If the starting ad-
dress of the block is 17, then the address for controls on a
46220-01 would be 17. The 46220-00 has 32 controls. If the
starting address of the block is 17, then the addresses for the
controls on a 46220-00 would be 17 and 18. The 46210 does not
have any controls.
INSTALLATION
UPDATED
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