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X-10 protocol for the Marmitek XM10 OEM Controller
Marmitek XM10 OEM Controller
*O.E.M Original Equipment Manufacturer
Safety Warnings
x The wiring of your electrical installation is live (230 V) and extremely dangerous. Never connect
the module when plugged into the mains. Always turn off the main switch before starting the
installation.
x To prevent short circuits, this product should only be used inside and only in dry spaces. Do not
expose the components to rain or moisture. Do not use the product close to a bath, swimming
pool etc.
x Do not expose the components of your systems to extremely high temperatures or bright light
sources.
x Do not open the product: the device contains live parts. The product should only be repaired or
serviced by a qualified repairman
x In case of improper usage or if you have opened, altered and repaired the product yourself, all
guarantees expire. Marmitek does not accept responsibility in the case of improper usage of the
product or when the product is used for purposes other than specified. Marmitek does not accept
responsibility for additional damage other than covered by the legal product responsibility.
How to implement
Two - way PLC interface for OEM applications (XM10)
The XM10 is a transmitter-receiver that plugs into a regular AC outlet and connects to the controller via a
modular RJ 11 telephone jack. Alternatively, the XM10 may be fitted inside the controller cabinet,
connected to the 230 V AC supply before the power transformer. (This would be a typical installation with
most security panels.)
It provides an opto-coupled 50 Hz. Square wave, synchronised to the zero crossing point of the AC line.
The controller generates X-10 compatible codes synchronised to this zero crossing point. The two-way
interface then couples the X-10 codes onto the AC line.
Two - Way transmission available
The two-way interface transmits and receives X-10 codes. It enables an O.E.M. to develop a system to
control X-10 Modules, and receive X-10 signals from remote sensors (P.I.R. motion detectors for example)
X-10 Code transmission
To transmit X-10 signals the controller must supply 1 ms .envelopes. to the TX input of the interface with
respect to common. These envelopes must be as close as possible to the zero crossing point of the AC
line (see timing diagrams). An opto- coupled output representing the zero crossing point of the power line
is provided for the controller to which X-10 codes are to be synchronised.
X-10 Code reception
The two-way interface uses a custom proprietary I.C. to read X-10 codes from the power line. This takes
a lot of burden off the microprocessor in the controller as it does not have to continuously monitor the
powerline and check all in coming signals (and noise) for validity. Any signals applied to the controller are
error-checked, valid X-10 codes. When a valid X-10 code is received, it is stored in the custom I.C. and
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