HID 40NKS-00-000000 Signo 40 Contactless Smartcard Reader, Multi-Technology, Support for OSDP Wiegand, Black Finish

The Signo 40 contactless smartcard reader (part 40NKS-00-000000) supports both OSDP and Wiegand output, so it can go onto a legacy Wiegand panel now and be moved to an OSDP bus later without swapping the reader. That matters on retrofits where the head end is older than the doors.

Yes, it is a multi-technology contactless smartcard reader, so a site running a mix of card types on the same badge population can read them at one reader head instead of standing up separate readers per technology.

It is a credential reader, not a lock or a standalone controller. It reads the badge and passes the credential data to an access control panel over OSDP or Wiegand, so you still need the panel, the locking hardware, and power as part of the same job.

The SDC IPRW Series is a Wiegand proximity reader with 125 kHz HID compatibility, so it addresses openings where the credential population is legacy 125 kHz prox cards and the panel takes a Wiegand input. The HID Signo 40 is a multi-technology contactless smartcard reader that supports OSDP as well as Wiegand, so it reads smartcard credentials in addition to working on a Wiegand wiring run. If the site is moving to smartcards or wants OSDP for supervised, two-way communication back to the controller, the Signo 40 is the reader that covers both; if the credential base is staying 125 kHz prox on Wiegand, the IPRW Series is the narrower fit.

Not across the full range. The SDC IPRW Series is described as a 125 kHz proximity reader with HID compatibility, so it covers 125 kHz prox credentials. The HID Signo 40 is a multi-technology contactless smartcard reader, so its credential coverage extends to contactless smartcards beyond 125 kHz prox. On a mixed-credential campus where some badges are prox and some are smartcards, swapping a Signo 40 for an IPRW at a single opening can leave smartcard holders locked out of that door, so confirm what is actually in cardholders' wallets before treating the two as interchangeable.

Black finish, ordered as HID 40NKS-00-000000. The model is also catalogued by HID under 6171BKT000000, so either designation gets you the same black Signo 40.

If the site is straight 125kHz proximity on a Wiegand panel and you do not need smartcard support, the SDC IPRW Series Wiegand proximity reader is a simpler option with 125kHz HID compatibility. Go with the Signo 40 when you need multi-technology smartcard reading or an OSDP path.

The HID Signo 40 supports OSDP as well as Wiegand, so it can be wired into an OSDP bus now or run on Wiegand and migrated later without changing the reader. The SDC IPRW Series is a Wiegand proximity reader, which suits a controller with Wiegand reader inputs. For a facility writing OSDP into its standard, the Signo 40 is the reader that meets that requirement at the door.

It is a commercial-rated access control reader. Property managers and integrators standardizing a multi-tenant or institutional facility are the intended buyer, not a single-family home.