Elevator Access Control Readers
Elevator card readers for car panels and lift lobbies: anti-clone encrypted cards, QR codes for visitors, Wiegand or RS485 output to the floor controller.
ValenID · valenid.com · sales@valenid.com
XM-120 125 kHz HID Prox-Compatible & EM Module, UART/USB
Low-frequency OEM module that reads HID Prox-compatible and EM4100/4200/4305 credentials, with 3.3 V UART and USB on one header and an external 490 µH coil.
- Reads HID Prox-compatible and EM4100/4102/4200/4305/4450 credentials at 125 kHz
- 3.3 V TTL UART (115200 bps) and USB full speed (12 Mbps) on one 6-pin header
- External 125 kHz coil, 490 µH ±10 µH, shaped to suit your enclosure
- Same 30 × 16 mm outline and pin map as the dual-frequency XM-200
- Rated –40 to +85 °C; ≤ 180 mA with RF field on, ≤ 30 mA off
- Frequency
- 125 kHz
- Credentials
- HID Prox-compatible, EM4100/4102/4200/4305/4450
- Interface
- UART (3.3 V TTL) + USB
- Power
- 5 V DC, ≤ 180 mA (RF on)
- Dimensions
- 30 × 16 × 9.2 mm
- Antenna
- External, 490 µH ±10 µH
Reply within 24 hours Tested before dispatch Worldwide shipping
125 kHz HID Prox-Compatible & EM Module, UART/USB: overview
The XM-120 is a 125 kHz-only reader module for devices that serve proximity-card sites. It reads HID Prox-compatible credentials together with EM4100, EM4102, EM4200, EM4305 and EM4450 cards and fobs, covering the EM and prox-format badges still issued at many offices, residential blocks and car parks. Typical hosts are door readers, visitor kiosks, barrier-gate terminals, elevator panels and building-automation controllers.
It uses the same 30 × 16 × 9.2 mm outline and the same published pin map as our dual-frequency XM-200, so one host PCB footprint can take either module. That leaves room to offer a 13.56 MHz-capable build later without a board respin; check command-set differences in the documentation before swapping. The module weighs about 1.8 g and is rated from –40 to +85 °C, which suits outdoor pedestals and unheated enclosures.
Integration notes
Power (5 V DC), ground, a 3.3 V TTL UART at 115200 bps and USB full-speed (12 Mbps) data lines share a 6-pin, 2.0 mm pitch header, and Windows, Linux, Android and macOS hosts are supported over USB. The external coil connects to the LF pins of the 4-pin, 1.25 mm antenna connector and should measure 490 µH ±10 µH. The HF pins exist because the pin map is shared across the family; this version is specified for 125 kHz only. Current draw is ≤ 180 mA with the RF field active and ≤ 30 mA idle. A configuration tool is available, firmware updates run over the serial port, and CE, FCC, RoHS and Japan Radio Law approvals are listed for the module.
Third-party credential and platform names on this page are trademarks of their respective owners and are used only to describe compatibility.
More features
- Serial-port firmware upgrades; CE, FCC, RoHS and Japan Radio Law listed
XM-120 specifications
RF & credentials
| Operating frequency | 125 kHz |
|---|---|
| 125 kHz credentials | HID Prox-compatible; EM4100, EM4102, EM4200, EM4305, EM4450 |
| Antenna | External, 490 µH ±10 µH at 125 kHz |
Interfaces
| Host interfaces | UART (3.3 V TTL levels) and USB |
|---|---|
| Data rate | UART 115200 bps; USB 12 Mbps (full speed) |
| Supported host OS | Windows 10, 8.1, 8 and 7; Linux; Android; macOS |
| Configuration & firmware | Management tool for configuration; firmware upgrade via serial port |
| Connectors | 6-pin 2.0 mm (power/data); 4-pin 1.25 mm (antennas); 2-pin 2.0 mm (fixing only) |
Electrical
| Supply voltage | 5 V DC via host header, or 4.3–5.5 V via USB |
|---|---|
| Current, RF field on | ≤ 180 mA |
| Current, RF field off | ≤ 30 mA |
Mechanical & environment
| Dimensions | 30 × 16 × 9.2 mm ±0.5 mm (antennas not included) |
|---|---|
| Weight | Approx. 1.8 g |
| Operating temperature | –40 to +85 °C (–40 to +185 °F) |
| Storage temperature | –40 to +85 °C (–40 to +185 °F) |
| Operating humidity | 10–90% RH, non-condensing |
Compliance
| Certifications | CE, FCC, RoHS, Japan Radio Law (TELEC) — listed for the module; request reports |
|---|
Connector pinout
| Pin | Signal | Function |
|---|---|---|
| P1-1 | VCC | Power input, +5 V DC |
| P1-2 | GND | Ground |
| P1-3 | TXD | UART transmit (3.3 V TTL) |
| P1-4 | RXD | UART receive (3.3 V TTL) |
| P1-5 | USB_DP | USB data + |
| P1-6 | USB_DM | USB data – |
| P2-1 | HF_TX1 | 13.56 MHz antenna, pin 1 |
| P2-2 | HF_TX2 | 13.56 MHz antenna, pin 2 |
| P2-3 | LF_TX1 | 125 kHz antenna, pin 1 |
| P2-4 | LF_TX2 | 125 kHz antenna, pin 2 |
| P3-1 | NC | Mechanical fixing pin, no electrical function |
| P3-2 | NC | Mechanical fixing pin, no electrical function |
P1: 6-pin, 2.0 mm pitch host header. P2: 4-pin, 1.25 mm pitch antenna connector. P3: 2-pin, 2.0 mm pitch fixing header. The pin map is shared with the dual-frequency modules; on this 125 kHz-only version only the LF antenna pair is expected to be used — confirm on the sample drawing.
Multi-technology module family at a glance
| Variant | 125 kHz | 13.56 MHz | iCLASS/Seos-compatible | BLE 5.1 | Mobile wallet | Size (mm) |
|---|---|---|---|---|---|---|
| XM-120-P-E | EM + HID Prox-compatible | — | — | — | — | 30 × 16 × 9.2 |
| XM-130-D-P | EM + HID Prox-compatible | Yes | — | — | — | 25 × 15 × 3.0 |
| XM-140-IC-M | — | Yes | Yes | — | — | 30 × 16 × 9.2 |
| XM-150-D | EM | Yes | — | — | — | 30 × 16 × 8.8 |
| XM-160-D-IC-N | EM + HID Prox-compatible | Yes | Yes | — | Listed (Apple Wallet) | 30 × 16 × 9.2 |
| XM-170-D-BT | EM | Yes | — | Yes | — | 30 × 16 × 8.8 |
| XM-180-D-IC-BT | EM + HID Prox-compatible | Yes | Yes | Yes | Listed (Apple Wallet) | 30 × 16 × 8.8 |
| XM-190-D-P-BT | EM + HID Prox-compatible | Yes | — | Yes | — | 30 × 16 × 8.8 |
| XM-200-D-P | EM + HID Prox-compatible | Yes | — | — | — | 30 × 16 × 9.2 |
13.56 MHz support = MIFARE Classic, DESFire EV1/EV2, Ultralight/Ultralight C, FeliCa, ICODE, CEPAS, CPU cards and NFC Forum Type 1–5 tags. All nine modules use external antennas and offer both UART and USB. Sizes in mm, antennas excluded.
Specifications can change between production batches. Confirm the current revision with us before placing volume orders.
Ordering options
Quote the SKU that matches your frequency, interface and mounting. Not sure? Send us your controller model and we will pick the variant for you.
| SKU | Configuration | Actions |
|---|---|---|
| XM-120-P-E | 125 kHz module: HID Prox-compatible + EM4100 family; UART (3.3 V TTL) + USB; external 490 µH coil |
Where the XM-120 is used
- Replacement reader boards for sites that still issue 125 kHz prox badges
- Visitor kiosks and badge-enrollment stations reading EM and prox cards over USB
- Barrier-gate and pedestal terminals mounted outdoors, down to –40 °C
- Host PCBs designed once for both 125 kHz-only and dual-frequency builds
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Turnstile card readers, QR scanners and face terminals for tripod, swing and speed gates, with Wiegand, RS485, RS232 or TTL output to the gate board.
RFID for EV Charging Stations: Modules, Cards & Fobs
EV charger RFID cards, key fobs and 13.56 MHz reader modules for charger OEMs and operators: UID formats, OCPP idTag mapping and UART integration notes.
XM-120 FAQ
Does the XM-120 read 13.56 MHz cards?
No. It is specified for 125 kHz credentials only. For MIFARE, DESFire or FeliCa as well, choose the dual-frequency XM-200, which uses the same outline and pin map.
Which 125 kHz credentials does it read?
HID Prox-compatible cards and fobs, plus EM4100, EM4102, EM4200, EM4305 and EM4450 transponders.
What coil should I use?
An external 125 kHz antenna with 490 µH ±10 µH inductance, wired to the LF pins of the 4-pin, 1.25 mm antenna connector.
Can I connect it to a PC without a microcontroller?
Yes. The USB data lines are on the host header, and Windows 10/8.1/8/7, Linux, Android and macOS are listed as supported hosts.
How much current does it draw?
Up to 180 mA with the RF field on and up to 30 mA with it off, from 5 V DC on the header or 4.3–5.5 V over USB.
Before you buy
Related buyer guides
Wiegand vs OSDP vs RS485: Which Reader Interface Should You Specify?
Compare Wiegand, OSDP and RS485 reader interfaces: wiring, cable limits, AES-128 Secure Channel and steps for a compatible access-control migration.
125kHz vs 13.56MHz: Choosing Access Cards and Readers
125 kHz cards are cheap but easy to clone; 13.56 MHz cards add memory and, on DESFire-class chips, AES security. Compare range, chips, security and migration.
Wiegand 26-Bit Format Explained (with a Free Calculator)
Wiegand 26-bit is an even parity bit, 8-bit facility code, 16-bit card number and odd parity bit. Convert card numbers to hex and back with the calculator.
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Get pricing for the XM-120
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