Apartment, Multifamily & Rental Property Access Control
Apartment building access control hardware: anti-clone readers with matched fob sets, QR visitor codes, 4G controllers for rentals and UHF tags for gates.
ValenID · valenid.com · sales@valenid.com
PC-140 Dual-Frequency USB RFID Reader/Writer, HID/CDC Switchable
One desktop unit for 125 kHz EM and 13.56 MHz MIFARE, DESFire, ICODE, CPU and NFC Forum tags, with switchable USB HID/CDC modes and active or command-driven reading.
- Dual frequency: 125 kHz EM4xxx plus 13.56 MHz ISO/IEC 14443A/B, 15693 and 18092
- Handles MIFARE Classic, DESFire EV1/EV2, Ultralight/Ultralight C, ICODE and CPU cards
- NFC Forum Type 1, 2, 4 and 5 tag support
- USB HID or USB CDC (virtual COM) mode, switchable; driver-free
- Active auto-read, or passive read/write on commands from your software
- Frequency
- 125 kHz + 13.56 MHz
- HF standards
- ISO/IEC 14443A/B, 15693, 18092
- Interface
- USB HID / CDC, switchable
- Power
- 4.8–5.2 V via USB, ≤ 150 mA
- Dimensions
- 110 × 80 × 16.2 mm
- Compliance
- RoHS
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Dual-Frequency USB RFID Reader/Writer, HID/CDC Switchable: overview
The PC-140 combines 125 kHz and 13.56 MHz in a single USB desktop reader/writer, so one unit on the enrollment desk handles legacy EM proximity cards as well as MIFARE, DESFire, ICODE and NFC credentials. It is aimed at integrators who issue cards for access control, time attendance, toll collection, anti-theft and guard-patrol systems.
On the HF side it supports ISO/IEC 14443A/B, ISO/IEC 15693 and ISO/IEC 18092, which covers MIFARE Classic, DESFire EV1/EV2, Ultralight and Ultralight C, ICODE, CPU cards and NFC Forum Type 1, 2, 4 and 5 tags. On the LF side it reads EM4xxx-family 125 kHz cards.
Two working modes suit two styles of software. In active mode the reader reports every card it detects without being asked; in passive mode it waits for a read or write command from your application. The USB port runs either as HID or as a CDC virtual COM port, a configuration tool updates reader parameters, and firmware is upgraded over USB.
Integration notes
The unit runs from USB at 4.8–5.2 V, drawing ≤ 100 mA in standby and ≤ 150 mA while working. It measures 110 × 80 × 16.2 mm, comes in a plain black housing with no logo on a 1,500 mm cable, and is RoHS compliant. Rated operating conditions are −20 to +60 °C at 20–80% non-condensing humidity.
More features
- 4.8–5.2 V USB supply, ≤ 100 mA standby, ≤ 150 mA operating
- 110 × 80 × 16.2 mm unbranded black housing, 1.5 m cable, RoHS
PC-140 specifications
RF & credentials
| Frequency | 125 kHz and 13.56 MHz |
|---|---|
| HF standards | ISO/IEC 14443A, ISO/IEC 14443B, ISO/IEC 15693, ISO/IEC 18092 |
| HF cards and tags | MIFARE Classic, MIFARE DESFire EV1/EV2, MIFARE Ultralight, MIFARE Ultralight C, ICODE, CPU (microprocessor) cards, NFC Forum Type 1, 2, 4 and 5 tags |
| LF cards | EM4xxx-family 125 kHz cards |
| Operations | Active card reading; passive read/write on host command |
Interfaces & software
| Host interface | USB, driver-free |
|---|---|
| USB modes | HID or CDC (virtual COM), switchable |
| Configuration | Management tool for updating reader parameters |
| Firmware | Upgrade over USB |
Electrical
| Supply voltage | 4.8–5.2 V DC via USB |
|---|---|
| Current (at 5 V) | ≤ 100 mA standby, ≤ 150 mA operating |
Mechanical & environment
| Dimensions | 110 × 80 × 16.2 mm (±0.3 mm) |
|---|---|
| Housing | Black, no logo |
| Cable length | 1,500 mm (about 4.9 ft) |
| Operating temperature | −20 to +60 °C (−4 to +140 °F) |
| Storage temperature | −40 to +80 °C (−40 to +176 °F) |
| Operating humidity | 20–80% RH, non-condensing |
| Compliance | RoHS |
Supported NFC Forum tag types
| Tag type | Air interface | Typical chips |
|---|---|---|
| Type 1 | ISO/IEC 14443A | Legacy Type 1 tags |
| Type 2 | ISO/IEC 14443A | MIFARE Ultralight, Ultralight C, NTAG2xx |
| Type 4 | ISO/IEC 14443A/B | MIFARE DESFire EV1/EV2, CPU cards with NFC application |
| Type 5 | ISO/IEC 15693 | ICODE |
Type 3 (FeliCa) is not listed for this model; see the PC-150.
Order code
| SKU | Frequency | USB modes | Cable | Housing |
|---|---|---|---|---|
| PC-140-D-N | 125 kHz + 13.56 MHz | HID / CDC, switchable | 1,500 mm | Black, no logo |
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 |
|---|---|---|
| PC-140-D-N | Dual-frequency 125 kHz + 13.56 MHz desktop reader/writer, USB HID/CDC switchable, black, no logo, 1.5 m cable |
Where the PC-140 is used
- Standardizing on one enrollment reader for sites that run both EM proximity cards and MIFARE or DESFire credentials
- Encoding NFC Forum tags and ICODE labels for asset records or guard-patrol checkpoints
- Enrolling time-attendance cards over a driver-free USB HID connection
- Building card read/write into custom software through the CDC virtual COM port
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PC-140 FAQ
What is the difference between HID and CDC mode?
HID mode presents the reader to the host as a USB human-interface device, while CDC mode presents it as a virtual COM port for software that exchanges serial commands. The mode is switchable, so one stocked unit fits both kinds of integration.
Does it read 125 kHz cards?
Yes. It reads EM4xxx-family 125 kHz cards alongside 13.56 MHz cards and tags, so a single reader covers mixed-credential sites.
Which NFC tags are supported?
NFC Forum Type 1, 2, 4 and 5 tags. For Type 3 (FeliCa) or SAM-based issuing, choose the 13.56 MHz PC-150.
What power does it need?
It runs from a USB port at 4.8–5.2 V and draws ≤ 100 mA in standby and ≤ 150 mA while working.
Is the housing branded?
No. The standard unit ships in a black housing without a logo, which suits integrators who add their own labeling.
Before you buy
Related buyer guides
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.
MIFARE Classic vs DESFire EV2/EV3: Security, Cost and Migration
MIFARE Classic's Crypto1 is broken and its cards can be copied; DESFire EV2/EV3 support AES-128. Compare security, memory and cost, then plan your migration.
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Get pricing for the PC-140
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