M1XRFTWM Installation Manual
Page 3
OVERVIEW
The letter "
M"
in the M1XRFTW
M
receiver part number stands for "
multiple receiver capable
". The previous Elk two way
receiver (M1XRFTW) was occasionally installed in multiples on a single installation. The intention and benefit of multiple
receivers was for added coverage in super large buildings. It was discovered however that if the multiple receivers were
not spaced far enough apart then their overlapping coverage area could cause processor memory overflow if the multiple
receivers too often heard the same transmission from one or more sensors. This could then lead to false supervisory
troubles or other issues. Not all installations experienced this and some continue to work fine with no issues. It can
largely depend on the installation or environmental conditions. This new M1XRFTWM receiver is especially designed
to filter out duplicate transmissions and recover from memory issues should they ever occur.
The M1XRFTWM is both a transmitter and a receiver (a transceiver). In other words it has the ability to transmit and
receiver thereby making it "two-way". The compatible Elk 6000 series wireless sensors are also two-way, making them
vastly superior to traditional one-way wireless sensors. See the listing of available sensors later in the manual. This
list is constantly growing and may not be current in this manual due to its printing date. Please contact your local Elk
distributor for the latest products and information.
NOTE: In the M1 Keypad Installer programming and the ElkRP programming software you may find conflicting wording
with respect to receiver and transceiver. That is because Elk produces two other models of wireless expanders for the
M1 Control. The ELK-M1XRFEG
†
allows M1 to accept Interlogix (aka GE, UTC) one-way sensors. The M1XRF2H
†
allows M1 to accept Honeywell (aka Ademco) 5800 series one-way sensors. Hopefully this doesn't cause confusion.
Regardless of the model and supported wireless protocol, each receiver connects to the M1 Control via the RS485 four
(4) wire Data Bus and becomes enrolled and integrated much the same way as a hardwired expander. Because they are
Data Bus attached they may be remotely mounted virtually anywhere in the building, providing maximum convenience
and coverage (range). The serial numbers (TXID) for all wireless sensors are stored safely inside the control. Should
it ever become necessary to replace a wireless receiver it shouldn't be necessary to reprogram the sensor info. Simply
replace the wireless expander and perform a data bus enrollment to allow the M1 Control to begin communicating with it.
VERY IMPORTANT
The M1XRFTWM "two-way" Transceiver must be enrolled as the
first zone expander
(Address # 2) on the M1 Control Data Bus.
And NO MORE THAN 3 additional M1XRFTWM transceivers may be connected to the M1 for expanded
coverage. If added, the 2nd M1XRFTWM transceiver must be enrolled at data bus address 3, the
3rd at data bus address 4, and the 4th at data bus address 5. If there are any other existing model
expanders (wireless or hardwire) already installed at one of these needed addresses they must be
relocated (moved) to a higher address to make room for the M1XRFTWM(s). See Appendixes A, B, &
C for additional details on the use of multiple transceivers.
No bus addresses other than 2, 3, 4, or 5 may be used for M1XRFTWM Transceivers.
Upgrading or retrofitting existing installations - In a retrofit or takeover situation it is possible to mix various
models of Elk M1XRFx wireless expanders and their compatible sensors on a single M1 Control. This can
be economically beneficial as it prevents having to throw away or replace existing wireless sensors just to
utilize another brand. HOWEVER, EXTREME CAUTION must be followed to ensure that each sensor is
installed within adequate range of it's respective and compatible wireless expander brand/model. In other
words, the sensors and wireless expanders are physically and electronically different. Each sensor can only
communicate with its respective wireless expander brand/model.
IN AN INSTALLATION CONSISTING OF MIXED BRAND/MODEL WIRELESS EXPANDERS THE SENSOR
BRAND/MODEL MUST BE MATCHED TO THE CORRECT WIRELESS EXPANDER BRAND/MODEL.
We recommend the ELK-M1G Control be running application firmware ver.
5.3.10 or higher. Refer to Elk's
website for "flash" file updates.
†
Not evaluated by UL
