ELK m1 lan setup

[techy21]

Hi
 
I have a elk m1 system with 7 ,16 input cards and 7, 8 way relays one keypad and one main board.
I tryed to connect the lan up by going from the main panel then to first input card then the next so so on but the system has moule lost all the time does anyone know how I to wire it correct????????

 

[wuench]

It is actually a serial bus and therefore needs to only be terminated on the ends.  You need to follow the connection diagrams in the manual (page 12), and verify the boards are terminated properly.   If you have one run, then you terminate the control and the last device on the run, if you are doing two runs then you would terminate the last device on each run and NOT the control.  A serial bus can only be terminated in two places, on the ends.  I wouldn't try to add them all at once, take your time, add one or two at a time starting with the keypad and powerup the control, to verify those are cabled correctly.  It only takes mis-wiring one to wreck the whole show.
 
With that many devices you would probably benefit from a the M1DBH hub, or retrofit hub.  And with that many devices you should add up the power requirements and see if you are over 1Amp power limit, likely you will need to add a second power supply at some point depending on how many 4 wire devices you add (motion sensors, etc).  The relay boards can pull a lot of power depending on how many relays you have engaged at a time.  I only have two M1XIN Input boards and 1 M1XOVR relay board and I am already getting close to the limit.

 

[Del91574]

Agree regarding the power in this case.
 
Also, what is confusing is the term LAN by the OP....are you referring to an actual TCP/IP network connection or the M1's 485 bus?

 

[nfsnz]

Definitely a power issue, but don't forget RS485 EOL Termination... Disconnect half of your modules as a start and see if they stay online. What cabling have you used to wire the RS485 BUS in? Must be a Twisted Pair cable. I know ELK talk about using CAT5 etc but ideally something like a Belden 8723 cable would be best. 

 

[Del91574]

Not true.
 
Elk mentions Cat 5 simply as a convenience form factor, and in the specific case of the M1, it provides a way for the manufacturer to get a novice or non-experienced person to wire a 485 bus correctly through hardware (DBH) and remove as much of the thought process out of the equation. If anything, it makes it far more difficult to loadshed bus devices on a typical system, it's an all or nothing affair for the power connections unless you want to crimp RJ45's with conductors removed and pigtail (which IMHO, negates the the use of a DBH to begin with) without considering any KP I/O connections to be used at the panel (guess you're supposed to abandon those in the field).
 
While UTP may be preferred or desirable, by no means must it be run or installed for an M1 to function properly. We have a couple hundred of EZ8's and M1G's out there with no ill effects on standard cabling, some with spliced daisy chain wiring, others with DBHR's, but no issues. To get very granular, you're better off, voltage-wise, with an industry standard 22 AWG compared to the 23 or lighter AWG contained in most typical category cable.