400 series card identification needed.

[Babybearjs]

enclosed are 2 photos of a 1A2 card on Ebay. I've never seen a card like this with a piggy-back board attached. seller just shows the MFD as 1977 other then that no info. can anyone ID this card, I've never seen one like this.

[pdxjim911]

This card is a 440A intercom designed to go into a 641A KSU which can be used with the 620 WE key system.

[unbeldi]

Some key systems such as my 513A2 KSU have two slots for 8" cards.



The inductors on this card tell me that it must be one of the Touchtone adapters or TT intercom units, such as the 424B dial intercom. [Ah, yes, 440A TT adapter, thanks]

[Babybearjs]

So, its a 440A? I don't remember seeing it in any KSSM paperwork? is it shown in any practice? what the listing number? I have the WE KSSM vol. 1 and 2 but have never seen it. is it located in another part of the BSP's?

[pdxjim911]

Yes, it is a 440A, the touchtone adapter for the intercom.  The BSP is in volume II of the Key Systems Service Manual, and is number 518-215-419.

[Victor Laszlo]

It can be easily identified from the second photo, when enlarged.  It says "440A KTU" on the circuit board edge.