About this item
The PHI Precision BP21 is the back plate for the Precision 2000 Series (Apex) rim exit device, supplied with a center-driven cam that lets the device work with access control trim. On a 2000 Series exit device, the back plate sits behind the active case and carries the cam that the outside trim's tailpiece engages. The BP21 is the center-driven cam version of that plate: its cam is built to receive the tailpiece of an access control product, so the exit device can be operated or controlled by electrified or keyed access trim rather than only by the standard mechanism. If you're converting or specifying a Precision 2000 device to run with access control trim, the BP21 is the back plate that makes the cam geometry match.
What the BP21 does on a Precision 2000 device
This is a specific conversion part, so it helps to be clear about where it fits. The Precision 2000 Series (also written P2K, the Apex 2000 platform) is Precision's rim and vertical rod exit device line. Inside the active case, the back plate holds the cam that transfers motion between the outside trim and the latch. A standard back plate uses a standard cam. The BP21 swaps in a center-driven cam, which is the geometry needed when the trim driving the device is an access control product whose tailpiece rotates the cam from the center. In short, the BP21 adapts a 2000 Series device so it accepts that access control tailpiece, the conversion that lets the exit device tie into an electrified access or controlled-entry setup.
Because it's a back plate and cam assembly, the BP21 is an internal part installed during setup or retrofit of the exit device, not a piece of trim or a standalone lock.
Where the BP21 is used
The BP21 belongs on Precision 2000 Series rim exit devices being paired with access control trim, for example an electrified lever trim or a controlled-entry device whose tailpiece needs the center-driven cam to engage the exit device correctly. It's the right part when you're integrating a 2000 Series exit device into an access control opening and the trim calls for the center-driven cam conversion. As with any exit device internal part, match it to your specific 2000 Series model and the access control trim you're installing.
PHI Precision BP21 specifications
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Type: Back plate with center-driven cam, exit device conversion part.
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Series: Precision 2000 Series (Apex 2000 / P2K) rim exit devices.
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Function: Center-driven cam receives the tailpiece of an access control product, converting the device to work with access control trim.
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Part number: BP21.
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Brand: PHI Precision (Precision Hardware).
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Category: Exit device part and accessory (installed internally).
Why order the correct back plate
Exit device conversions only work when the cam geometry matches the trim. Using the right back plate, the BP21 center-driven cam, is what allows a Precision 2000 device to accept an access control tailpiece and operate the way the access system expects. The wrong cam means the trim won't drive the device properly. For installers and specifiers integrating a 2000 Series exit device with access control, the BP21 is the back plate that completes that conversion, so it's worth confirming this is the cam type your trim requires before ordering.
One thing to confirm before ordering: the BP21 is specific to the Precision 2000 Series and to access control trim that uses a center-driven cam. Verify your exit device is a 2000 Series (Apex) unit and that your access control trim calls for the center-driven cam conversion. If you're unsure which back plate or cam your setup needs, we can help you match it.
Order the PHI Precision BP21 from American Locksets
We stock Precision exit device parts and accessories from authorized distribution, so every part ships with a real manufacturer warranty. Find related components in the Precision exit device accessories category, see the full PHI Precision exit devices range, or browse all exit hardware.
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