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Would you go for Moxa or ADAM in terms of connection reliability?

I need to do data acquisition from 20-30 mix of digital/analog signals using Modbus ethernet.

Regards.

Three quick questions:

1. What's your mix of i/o?

2. Do you have any other key requirements (i.e. types of
analogs/discrete, update speed, accuracy, operating temperatures,
shock/vib, approvals, etc...)?

3. What are you connecting to (i.e. type of PLC, HMI, DCS, writing your own program, peer to peer, etc...)?

Hello sir,

1. It varies from RTU to RTU, I'm gonna have like 4-5 RTUs to get my whole plant covered.

2. No complex requirement. The source is either 4-20 mA or electromechanical relay outputs. Scan update speed (if possible) every 2-3 secs.

3. We have Kepware OPC server, which supports various drivers. In this case I would like to use Modbus Ethernet. From this Kepware OPC, data will go to OSIsoft PI server for final storage.

Regards.

You may want to look at Acromag's Ethernet Modbus TCP/IP slave remote
i/o products as well.

Model 951EN-4012, Combo AIO and DIO
--good for a mix of 4 AI-I inputs of 4-20mA and 6DI inputs from
mechanical relays in a zone
Model 963EN-4012, 12ch AI-I
Model 989EN-4C16 or -4016, 16ch DIO

--many other i/o products are available as well.

If any questions, go to http://www.acromag.com and search on the models above or simply email me at dlupo at acromag. com

Kind Regards

Don...

Both are equally reliable. Moxa may be slightly better for general IO but the difference is not really enough to rule out the ADAM. Advantech does have a very nice line of IO that works very well with its converters.

Fred Loveless
Senior Applicaiton Engineer
Kepware Technologies
http://www.kepware.com

ok noted. The latest Moxa IOlogik E4200 has got many new features compared to Advantech ADAM 6000 series IO module. IMO, not sure whether Advantech will release an update to their 6000 series..