Liebert Sitelink alternative

[krac]

Working on an AX Supervisor project interfacing with all sorts of Data Center equipment. Getting around to hooking up 18 Leibert System 3 units that will require using 2 Sitelink-12 panels. Liebert wants $8500 for the panel. The sitelink panels look to be an OEM version of the ALC LGNet panel. We also got a price on the Opencomm NIC for $1400 each. Has anyone found another way to communicate with the native RS422 Liebert bus?

[bobby m]

Fieldserver ?

[krac]

Didn't see Liebert in the Fieldserver driver list. The Liebert RS422 port uses a proprietary protocol.

Did find the plug-in opencomms card for around $300 each. Unfortunately we need the card with adapter.

[qtip]

Daisey chain the devices and set the IDs per Opencomms instructions.
Try a "Modbus Async Network" on a Jace. Set the "Data Mode" to RTU, set the serial port correctly and get the modbus registry from Liebert and you should be in.

[krac]

Daisey chain the devices and set the IDs per Opencomms instructions.


Problem is the units don't have the Opencomm cards installed, just the native Liebert port.

[sysint]

Daisey chain the devices and set the IDs per Opencomms instructions.
Try a "Modbus Async Network" on a Jace. Set the "Data Mode" to RTU, set the serial port correctly and get the modbus registry from Liebert and you should be in.Why aren't you recommending trying to jam a BCU on the system?

[qtip]

Ohh let me think about this..........a Jace would do the job if there were Opencomms cards and a BCU won't........and if I come across a BCU to jam somewhere YOU will be the first to know..:D:eek:

[sysint]

You are learning. I know it's slow because you are (were?) a Trane guy, but you are making some progress. Keep trying. I see Trane is using LNS now so you can say that is OK.

Isn't the LG box a gateway?

[hotrod53]

You are correct about the ALC OEM, they are made by ALC. As an ALC dealer, I can't buy them either. There is a way to sequence them hard-wired, Liebert sells a sequencer that does this that is only a relay sequencer. As far interfacing, their protocol is called IGM, we read it right out of the Sitelink module. Typically there is a plug that you have to swap in the cabinet and you connect to a terminal block on 77-78 or 78-79, I forget, but there is only these two terminals on that block. You also have to program the keypad to tell it to speak IGM. If you don't have the interface I think that you are out of luck.

[ddcctrl]

Hello Krac:

Can you contact me concerning what your solution was for this? I have similar opportunity. Please see email and IM info in profile. Thanks.

[krac]

The customer ended up buying the opencomm cards.