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MCS 312 - RCB board needs Z21 eprom #32846 04/04/22 05:02 PM
Joined: Mar 2018 Posts: 2 E Excel stranger
Excel stranger E Joined: Mar 2018 Posts: 2	I'm in need of Z21 eprom for an RCB board on an OTIS MCS 312 controller. Any leads as to where I could buy some? Even working second hand Z21 will do given they are hard to come by. HELP! Attachments EPROM Z21 highlighted.jpg (1.94 MB, 15 downloads)

Re: MCS 312 - RCB board needs Z21 eprom Excel #32847 04/04/22 06:00 PM
Joined: Nov 2009 Posts: 474 Portland. Oregon Johnny Journeyman
Johnny Journeyman Joined: Nov 2009 Posts: 474 Portland. Oregon	I have some eproms and eeproms from years ago. Do you have the ability to read and write the programs into the chip? Do you have any other information on the chip? The manuf, size, old part number?

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