ELK-M1XRF319 and the ELK-M1XRFTW Wireless Transceivers Two Part Question

[Doug G]

I have the ELK-M1XRF319 and the ELK-M1XRFTW Wireless Transceivers. Will the ELK-M1XRF319 sensors work on the ELK-M1XRFTW Wireless Transceiver? If not, I did buy ELK-M1XRF319 transceiver, but it is NOT currently installed yet and I was waiting to see if my question above is possible or not. If not compatible, how would I install the ELK-M1XRF319 with the ELK-M1XRFTW? Should they be far away from each other or can they be close to each other? Would the ELK-M1XRF319 connect into the same RS485 bus that the ELK-M1XRFTW is connected too? Can I use the ELK-M1DBH Data Bus Hub to connect the ELK-M1XRFTW and ELK-M1XRF319 to that? Right now all I have is the keypads connected to the ELK-M1DBH Data Bus Hub and I would like to consolidate. I am really looking for best practices if there are any.

The reason I ask is because I like a couple of the sensors that the ELK-M1XRF319 offers and not sure if they will work on the ELK-M1XRFTW Wireless Transceiver.

Thank you.

[Brad Weeks]

The ELK M1 Gold System will support 3 wireless technologies — ELK Two-way (6000 series) using the M1XRFTWM Transceiver,  319.5 MHz sensors using the M1XRF319 and Honeywell 5800 Series using the M1XRF2H Receiver. It is possible to have the different wireless technologies communicating with the M1 at the same time however the M1XRFTWM will only communicate with the ELK Two-way sensors — the M1XRF319 will only communicate with the 319.5 M Hz and the M1XRF2H will only communicate with the Honeywell 5800 series sensors.  The M1XRFTWM and the M1XRF319/M1XRF2H  are bus devices and connect to the M1s RS485 Data Bus the same way as a Keypad or other bus device. There are three methods to wire the M1s RS484 Data Bus 1) M1DBH Data Bus Hub using Cat5/6 all the way from the M1DBH to the device, 2) M1DBHR Data Bus Hub Retro Fit using 4-Conductor; 3) maximum of 2 Home Runs and Daisy Chaining Devices. More information on M1 Data Bus configuration can be found on page 12 and 13 of the M1 Installation Manual.  Because the M1XRFTWM and M1XRF319/M1XRF2H are Bus Devices they can be remotely located to help improve wireless coverage and it is possible to add additional M1XRFTWM and M1XRF319/M1XRF2H modules to the data bus to help eliminate any weak signal areas or dead zones. Please refer the M1XRTWM and M1XRF319/M1XRF2H Installation Manuals for specifics on supported addresses and so forth for these devices.  If mounting the M1XRFTWM and M1XRF319/M1XRF2H in close proximity to each other we’d suggest keeping them approximately 24 inches apart.

[Doug G]

@Brad Weeks Thank you for the thorough explanation. I completely understand.

[Doug G]

Update:

So I have installed the M1XRF319 and powered off the M1 and it is on RS-485 via the ELK-M1DBH data bus hub and plugged it in to J5 and then plug the RJ45 Terminating Plug into J6 and power up the M1 and the M1XRF319 is not powering on and has no lights lit up.

I powered off the M1 yet again, so I decided to move the M1XRF319 to J4 where my M1XSLZW is plugged into and move the M1XSLZW to J5, and moved the Terminating Plug to J6 and I powered on the ELKM1 and viola the M1XRF319 is powered on and working. So I am like great. I assign the bus address 5 to M1XRF319 as that is the next available address according to my ELKRP software using the M1XEP and then perform an enrollment and all my devices fall off and show device is missing. I try to re-enroll and get nothing all my devices (Keypads x 3, M1XRFTW Transceiver, And the M1XSLZW).

Then I power off the M1 and unplug the M1XRF319 from the data bus hub and then plug the M1XSLZW back into J4 and plug the RJ45 Terminating Plug back in J5 and then power on the M1 and then enroll all devices and everything comes back online as normal.

I am confused I read all manuals even the M1 install manual, the data hub manual, and the M1XRF319 manual and still confused as the purpose of the Terminating plug is to be resistor for the last device in the bus chain for the data bus hub. Do I need a resistor on the ElkXRF319 if it the last device (Plugged into J5) and not the RJ45 Terminating Plug (Plugged into J6)? If I need the resistor then what is the purpose of the RJ45 Terminating Plug?

I have the M1XRFTW plugged into the four-wire connection on the M1 and NOT on the Data Bus Hub. I did use Cat5 for all the connections made to the Data Bus Hub for all devices connected up to the Data Bus Hub. Under the ELKRP software I do show one of my Keypads (M1KP2/KP3) and the M1XRFTW sharing Bus Address 2. Is this normal or should that be addressed? It is working just fine though as is.

Any ideas how to fix the ElkM1XRF319 and also is my data bus address 2 fine? Thank you.

 

[Brad Weeks]

The M1DBH Data Bus Hub requires a Cat 5/6 from the M1DBH all the way to the Bus Device in the field — NO short pigtails then to 4 conduct is allowed. The M1DBH uses 6 of the 8 conductors of the Cat5/6 with two conductors being the return path back to the M1DBH one for Data A and one for Data B. The M1DBH keeps the Data A and Data B in a “Daisy Chain” configuration. Included with the M1DBH is an RJ45 Plug with the 120Ω Ohm Resistor built in. After adding devices to the M1DBH the RJ45 Plug with resistor will be installed into the First Un-Used Port on the M1DBH and connects the 120Ω Resistor across Data A and Data B. When using the M1DBH Hub there is NO NEED to install a Black Shorting Cap (aka Black Jumper) onto and Bus Device or physically install the 120Ω Resistor onto the M1XRF319 or the M1XRF2H Receivers.

 

The M1 RS485 Data Bus and consist of the following Bus Devices:

• 16 Keypads (M1KP, M1KPB, M1KP2/3, M1KAM, P212S Power Supply) Addresses 1 -16 and are a TYPE 1 Bus Device
• 11 Inputs Expanders which includes Hardwired M1XIN’s and Wireless Receiver M1XRFTWM, M1XRF319 and M1XRF2H Addresses 2-12 Depending on the model —- refer to the Installation Manual for each model for specifics on compatible Bus Addresses. Input Expanders are a TYPE 2 Bus Device
• 11 M1XOVR 8 Relay and 8 Low Voltage Output Expanders Addresses 2-12 TYPE 3 Bus Device
• 7 Serial Port Expanders , M1XSP and variations of the M1XSP for example the M1SLZW Addresses 1-7 TYPE 5 Bus Device
• Type 4 Bus Devices are for future use

 

It is OK to have overlapping Address as long it is a Different Bus TYPE — for example Keypad Address #2, M1XRFTWM Address #2 M1XOVR Address #2 and M1XSP Address #2 are perfectly acceptable because they are Different TYPES. You will have issues if you have two of the SAME Type Bus Device set to the Same Address for example two keypads set to address #2 or two M1XINs set to address #2 will be a problem. More information on the Data Bus configuration ,  Data Bus Device Addressing and Enrollment can be found on page 12 and 13 of the M1 Installation Manual.

 

The M1s Data Bus is an RS485 Data Bus and according to RS485 Protocol needs to have a 120Ω Ohm Resistor across Data A and Data B at each end of the bus. The two 120Ω Ohm Resistors are in parallel with each other and overall resistance across Data A and Data B should be ~60 -70Ω Ohms.

 

I suspect you may have issue with the RJ45 connector or the crimp to the connector or the wiring going to the M1XRF319 Receiver. You may want to double check the wiring of the RJ45, or  install a new RJ45 connector and double check to make sure going to the M1XRF319 +12V is the Solid Brown, Data A is Solid Green and Solid Orange, Data B is White Green and White Orange and NEG is White Brown.

 

In your Bus Configuration you have:

• 4 Conductor going to the M1DBH —- correct?
• You have the M1XRFTWM connected to J1 or J2 —- correct?
• In this case you DO NOT place a Jumper on JP3 on the M1 Main Board. You will place a Black Jumper on to JP1 “Term Res” of the M1XRFTWM

 

To Test Bus Resistance”

• Power Down the M1 System including any secondary power supplies or the P212S power the bus devices
• Un-plug each device from the M1DBH
• Plug the RJ45 with built in 120Ω Ohm Resistor into J1 on the M1DBH
• Measure the resistance Across Data A and Data B at the M1
• You should measure ~60-70Ω Ohms of resistance
• Move the RJ45 Plug to J2 and plug any device into J1
• Measure the resistance across Data A and Data B — You should measure ~60-70Ω Ohms of resistance
• Keep repeating this process of moving the RJ45 Plug to the next un-used Port and plugging in another bus device and measuring the resistance until all of you bus devices are connected
• The Resistance should always be ~60-70Ω Ohms However this does not mean the bus wiring is correct you should still have Data A and Data B reversed at some point BUT still get a good resistance reading
• If the resistance readings are good power up and measure the DC Voltage at each Bus Device — You should measure 12-14 VDC

 

Your Question “Any ideas how to fix the ElkM1XRF319 “ See Above”  And the question “is my data bus address 2 fine”  — What device are your referring to as Address #2? You can have a keypad at Address #2 and the M1XRFTWM MUST be address #2 .

[Doug G]

@Brad Weeks It turns out I had a wire crossed on the M1XRF319 Receiver, so it is now up and running and assigned to bus address 3. It is officially enrolled now. I had it wired like a keypad, but the wire was crossed for the data bus paths so I swapped based on your instruction and it is working now. My eyes are not what they used to be.

In your Bus Configuration you have:

• 4 Conductor going to the M1DBH —- correct? This is NOT correct. The M1XRFTWM is connected only to the 4 conductor port on the M1 board. 
• You have the M1XRFTWM connected to J1 or J2 —- correct? This NOT correct. I have the M1DBH connected to port J1 on the M1 panel using the W018B Ribbon Cable. So all my devices (Keypads x 3, M1XRF319, and the M1XSLZW) are on the M1DBH data bus.
• In this case you DO NOT place a Jumper on JP3 on the M1 Main Board. You will place a Black Jumper on to JP1 “Term Res” of the M1XRFTWM – This is correct as I have the jumper on JP1 on the M1XRFTWM.

In this the case I would have two home runs to the panel unless I wanted to add an optional expansion board. Is the above configuration acceptable? Thank you Brad.

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