4DP7APXIO111
Availability: In Stock
HL PIU I/O Bus Controller
This is the version of the High Level PIU I/O Bus Controller used in early PIU releases, including R200, R300, and R310/320.
This version of the I/O Bus controller is used in controllers with the 4DP7APXPM11, 4DP7APXPM122, and 4DP7APXPM133 PROM/RAM boards.
The I/O Bus Controller card adapts the microprocessor bus to the signal and timing requirements of the PIU's I/O bus and A/D converter. It also performs diagnostic functions on the I/O section of the PIU, to prevent incorrect I/O card or point selection, to verify correct operation of the I/O clocks, to detect shorts between in the I/O lines, and to check the integrity of I/O address and data lines.
- System: Honeywell DCS
- Part Number: 4DP7APXIO111
- Alternates: 4DP7APXIO111
- Category: High Level PIU CCFA
- Availability: In Stock
- Price: Contact for Quote
- Shipping: Same Day Shipping Options Available
- Price: Contact for Quote
- Warranty: Minimum one-year replacement policy
Western Process Computers, Inc. provides certified, tested, like-new hardware ranging from single printed circuit boards on exchange up through complete assemblies to worldwide users of Honeywell DCS systems (TDC 2000 & TDC 3000). We specialize only in Honeywell DCS hardware such as the 4DP7APXIO111. This is our focus, our specialty – this is all that we do. Request a quote today for competitive pricing and lead times.


