Nedap Cards Explained: Magna, NeXS, TRANSIT & uPASS

Nedap, AEOS and the Product Family

Nedap is a Dutch technology company whose AEOS platform is one of the more sophisticated enterprise access-control systems in use across European commercial real estate, data centres, and infrastructure sites. Unlike systems that treat the card as a simple identifier, AEOS is a policy-driven architecture: the credential carries enough encoded structure that the reader can verify it belongs to the correct customer deployment before even consulting the controller. That architectural decision has direct implications for which credential types will operate in a given installation.

The AEOS credential portfolio reflects three decades of product evolution. The original Magna 125 kHz proximity line was later joined by NeXS, which shares the same LF encoding standard but is produced on updated carrier stock. For vehicle-access applications, TRANSIT passive long-range tags and the UHF-based uPASS family handle read distances that a wallet card could never achieve. The Combi variant bridges formats, embedding a UHF antenna, a 125 kHz coil, and a high-frequency smart chip on a single credential — useful where an organisation needs one badge to satisfy multiple reader types across a mixed estate.

Nedap occupies what access-control procurement teams recognise as an enterprise-tier proprietary format: the encoding depth, the customer-code layering, and the global installed base make compatible-credential supply a specialised exercise. The depth of that specialisation — selecting the right blank substrate, encoding the correct data structure, verifying the output at the reader's Wiegand or OSDP port — is precisely the installed-reader lock-in that keeps many facilities teams tethered to original-vendor supply chains longer than necessary. It is a format Security ID Systems specifically stocks. Facilities managers who need enterprise-grade proprietary format replacements that are compatible with their installed readers can obtain Nedap-format credentials without routing through the original vendor's distribution channel.

The 128-Bit Magna and NeXS Proximity Format

The technical signature of a Nedap LF credential is its 128-bit data payload transmitted using ASK modulation with Manchester encoding at 125 kHz. That bit depth distinguishes it immediately from the more common 26-bit Wiegand cards found in mid-market installations: where a standard 26-bit card carries a facility code and card number in roughly 40 usable bits, the Nedap format encodes a subtype identifier, a customer code, and an extended card serial number across 128 bits. Readers programmed for Nedap format will reject a card that presents the wrong subtype, regardless of whether the card number falls within an expected range.

Magna is the legacy designation for the original Nedap LF line; NeXS is the current equivalent, produced on thinner ISO-format stock with the same underlying encoding. From a reader-compatibility standpoint the two are interchangeable in most AEOS deployments, and compatible credentials supplied against a NeXS specification will operate in readers that were originally supplied with Magna cards. If you are unsure which variant your installation uses, our access card format identification guide walks through the physical and electronic markers to check.

For production of compatible LF Nedap credentials, the blank substrate must carry a writable transponder capable of emulating the 128-bit ASK/Manchester data structure — T5577, Q5, and EM4305 chips are the standard writable LF transponders used in this context. The encoding data is read from a sample credential presented to our equipment, or is drawn from a customer-supplied site programming file that specifies the subtype, customer code, and card-number range; the finished card presents identically to the original at the reader's Wiegand or OSDP output. Facilities teams managing large AEOS estates often source Nedap compatible proximity cards in bulk to cover attrition and new-starters without waiting on original-equipment lead times.

The 128-bit structure also means that producing a compatible requires a defined mapping process: every field in the data payload must be correctly placed for the reader to accept the credential. This is not a commodity duplication task — it demands the same systematic approach used for other enterprise-tier formats such as Gallagher compatible proximity cards or Lenel 42-bit compatible cards. The reward for that precision is a replacement credential that is electrically indistinguishable from the original at the reader antenna.

TRANSIT Long-Range and uPASS UHF

TRANSIT is Nedap's passive long-range credential family, designed for vehicle-access and barrier-control applications where read distances of several metres are required. TRANSIT tags typically operate at 125 kHz but are physically much larger than a wallet card — windscreen-mount transponders and dashboard tags are the most common form factors. The extended antenna geometry is what delivers the read range; the underlying encoding is consistent with the Nedap LF data model, so the same AEOS controller infrastructure manages both pedestrian-badge and vehicle-tag reads.

uPASS operates in the UHF band (typically 865–868 MHz in the ETSI region or 902–928 MHz FCC), achieving read distances beyond what any LF technology can sustain — practical vehicle-access systems based on uPASS frequently perform reliable reads at five to ten metres. The uPASS product line includes both vehicle-mounted tags and handheld credentials for pedestrian UHF lanes. Because UHF credential replacement requires a UHF-capable blank rather than the LF substrates used for Magna and NeXS, sourcing compatible uPASS tags is a different supply exercise from sourcing LF cards.

The Combi credential layers all three technologies — UHF, 125 kHz LF, and an HF smart chip — onto a single ISO card body. An employee in a Combi deployment carries one badge that satisfies the pedestrian door reader (LF prox), the car-park barrier antenna (UHF), and any HF smart-card reader in the same estate. The Combi form is the most complex compatible-credential request we receive for the Nedap family, and it requires careful specification of which bands are in use at the target site before a compatible blank can be selected.

It is worth noting that the uPASS UHF line is used not only for vehicle access but increasingly for high-throughput pedestrian lanes in stadiums, transport hubs, and large campuses where LF read speeds are insufficient. In those deployments a handheld UHF card or wristband credential operates on the same AEOS controller platform as the LF pedestrian doors, giving the access-control team a single policy engine across radically different read-range requirements. Compatible UHF credentials for these applications follow the same ISO 18000-6C supply path as windscreen TRANSIT tags, with EPC data sourced from the site's enrollment records.

Producing Compatible Nedap Credentials by Band

Low-frequency Magna and NeXS compatibles are produced on T5577, Q5, or EM4305 writable transponders. These chips implement the same 128-bit ASK/Manchester protocol the Nedap reader expects, and when correctly programmed they are electrically indistinguishable from the original credential at the reader's antenna. The programming input is either a sample card presented to our encoding equipment — from which our tools read the site-specific data values — or a data file from the end customer specifying the subtype, site code, and card-number range. The finished credential passes through a verification read before it ships.

UHF-band uPASS compatible tags require a UHF-capable blank — typically an ISO 18000-6C (EPC Gen2) substrate tuned to the correct frequency band for the installation geography. The Nedap uPASS reader is programmed to look for specific EPC data structures; the compatible tag must be written with EPC content that matches the site's enrollment data. This is more complex than LF programming and requires site-specific data to be provided by the customer. Our proximity card frequencies and standards glossary covers the frequency band and protocol distinctions that matter when specifying a UHF compatible.

Combi credential production combines both supply paths: an LF-capable blank is selected for the 125 kHz portion, the UHF antenna is integrated into the same laminate, and the HF chip layer is enrolled separately if the smart-card function is active. Not every site activates all three layers of a Combi credential, so it is important to confirm which bands are reader-active before placing an order. Customers unfamiliar with how their Nedap estate is configured can reference our compatible versus genuine access cards buyer's guide for background on what information needs to be recorded from a working sample before a compatible can be specified.

Across all bands, the 125 kHz LF proximity format category covers the Magna and NeXS lines alongside other enterprise LF formats. Nedap's 128-bit structure makes it more selective than commodity 26-bit formats but the supply process follows the same logic: present a working credential or supply the site encoding data, and compatible replacements can be produced in standard ISO card, key fob, or tag form factors depending on what the application demands. For estates that also deploy Hitag2 compatible cards and fobs or Avigilon 56-bit compatible cards, multi-format orders are handled in a single transaction.

Ordering Compatible Nedap Cards and Tags

Ordering compatible Nedap proximity credentials begins with identifying which product line is in use and, for LF formats, whether the installation is Magna or NeXS. In practice the two share encoding and either type of compatible will operate in both reader variants, but confirming the physical form factor — ISO card, clamshell fob, windscreen tag, or handheld UHF credential — ensures the replacement suits the user's carry method and the reader's mounting location.

For accounts running mixed estates — Nedap on some doors, other enterprise formats on others — we can supply compatible credentials for multiple formats in a single order. Gallagher compatible proximity cards and Lenel 42-bit compatible cards are examples of enterprise-proprietary formats that coexist with Nedap in large multi-system installations. Consolidating credential supply across formats reduces the number of vendor relationships a facilities team has to manage and keeps re-order lead times predictable.

If a site is moving toward a multi-technology estate or adding UHF vehicle access alongside an existing LF pedestrian system, the Combi format is worth evaluating. It eliminates the need to carry separate credentials for different reader types and simplifies badge stock management — one card SKU covers all access points. Discuss the active bands with your access-control integrator before ordering to confirm that the HF smart-card layer is or is not in active use. Contact our technical team to discuss compatible Nedap credential specifications for your installation, or browse our full compatible access credential catalogue for available format and form-factor options.

For sites that are planning a phased migration — for example, introducing UHF vehicle access while retaining the existing Magna or NeXS pedestrian infrastructure — Combi credentials can serve as a transitional badge stock that works across both generations of reader without issuing separate credentials for each access point. This approach is particularly common in large commercial campuses or corporate headquarters where a vehicle-access upgrade is approved ahead of a full pedestrian-system refresh. Software House CCOTZ 37-bit compatible cards are another enterprise-tier format frequently encountered in the same large-estate deployments as Nedap, and our team handles both in parallel orders.

Security ID Systems is an independent manufacturer and supplier of compatible access-control credentials and is not affiliated with, authorized by, or endorsed by Nedap.