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House Codes
All of your X-10 modules, controlled by your HMS 1100, must be set to a House Code. A House Code can have 16 unit
numbers. The House Code is set on each module using a dial. House codes are letters A through P.
Unit Numbers
Each module has its own Unit Number. Any unit number that is not being used for an ALC Switch Module may be used for an
X-10 Module. ALC Switch Modules and X-10 Modules can not be assigned to the same unit number.
Each ALC switch module must have a unique address. ALC switch modules on the same branch can NOT have the same
address. ALC Modules have 31 possible addresses, 1 through 31.
More than one X-10 Module can have the same unit number if you want to control multiple lights with the same unit number.
X-10 Modules have 16 possible unit numbers, 1 through 16.
HMS 1100 systems have 511 unit numbers. They consist of ALC and X-10 module unit numbers, hardwire voltage output unit
numbers, and internal flag unit numbers as follows:
HMS 1100 Modules / Output
Unit Numbers Unit Numbers
1 - 16 X-10 modules 1 - 16, House Code X
17 - 32 X-10 modules 1 - 16, House Code X+1
(1 - 31) ALC addresses 1-31, Module 1 - Branch 1 *
33 - 48 X-10 modules 1 - 16, House Code X+2
49 - 64 X-10 modules 1 - 16, House Code X+3
(33 - 63) ALC addresses 1-31, Module 1 - Branch 2 *
65 - 80 X-10 modules 1 - 16, House Code X+4
81 - 96 X-10 modules 1 - 16, House Code X+5
(65 - 95) ALC addresses 1-31, Module 1 - Branch 3 *
97 - 112 X-10 modules 1 - 16, House Code X+6
113 - 128 X-10 modules 1 - 16, House Code X+7
(97 - 127) ALC addresses 1-31, Module 1 - Branch 4 *
129 - 144 X-10 modules 1 - 16, House Code X+8
145 - 160 X-10 modules 1 - 16, House Code X+9
(129 - 159) ALC addresses 1-31, Module 2 - Branch 1 *
161 - 176 X-10 modules 1 - 16, House Code X+10
177 - 192 X-10 modules 1 - 16, House Code X+11
(161 - 191) ALC addresses 1-31, Module 2 - Branch 2 *