Siemens Power MEC 1201 (549-614)+Trunk Interface II

dear all, 

I am new at Apogee hardware and software, so, excuse me for my question

So...

1) I have about 7 hvac controllers Siemens Power MEC 1201, 16DI, 4DO, 8AI, 4AO (part number 549-614)
2) controllers connected to BLN(2 wire) bus
3) BLN bus connect to PMD terminal of Siemens Trunk Interface II
4) Siemens Trunk Interface II connect to PC via rs-232
5) There is a Desigo Insight installed on PC
6) There is PII connection type at SCADA System Settings. This connection type assign to Trunk Interface

So, now i want replace old SCADA by newer software. Also i want replace Trunk Interface II by more modern device. But i can't understand what is BLN interface/protocol, which privide Apogee Power MEC controller. What hardware should be instaled for integrade BLN to Bacnet IP, or ModBus (RTU, TCP) ect; 

By the picture that looks like system profile in Insight (not Desigo Insight a Europe product). The current rev of Insight is 3.15, This is also the last rev they are going to make. The TI-II device is ok for Insight. 

If you are looking to fully upgrade then the new software package is DesigoCC 3.0 and would require a P2 driver and AEM  (Apogee Ethernet Modem).

A couple clarifications if you do intend to update your software to Desigo CC P2 (Proprietary protocol).

Your firmware must be 2.8 or higher

You will need an AEM for Desigo CC to communicate, but your hardware does not support an AEM. MECs only support AEMs when there is a second Modem/MMI port. The product description must have word "modem" in it. I believe modem support only comes with model number 13xx.

See page 6 of the Tech Spec.

https://www.downloads.siemens.com/download-center/Download.aspx?pos=download&fct=getasset&id1=44907