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ACR1552U — USB NFC Reader IV (4th Generation) Complete Guide

Quick Summary: The ACR1552U is ACS's 4th-generation flagship multi-protocol USB reader. Delivering ultra-fast 848 kbps data rates, extended ISO 15693 vicinity tag support, built-in Keyboard Emulation mode, and a hardware SAM slot, it is the definitive enterprise solution for healthcare, government e-Passports, and multi-standard asset tracking.

If the ACR122U is the experimental playground and the ACR1252U is the certified NFC specialist, the ACR1552U is the ultimate versatile flagship supporting virtually all 13.56 MHz RFID standards.

Unboxing & Hardware Overview​

  • Dimensions & Weight: 98.0 × 65.0 × 12.8 mm, white ABS casing, 79–89 g.
  • Antenna: High-efficiency 50 × 40 mm internal antenna providing an industry-leading operating range of up to 70 mm.
  • Interface Variants: Available in USB Type-A (ACR1552U-M1) and USB Type-C (ACR1552U-MF).
  • SAM Security Slot: 1 × ISO 7816 Class A (5V) SIM-sized slot supporting up to 1,250 kbps.
  • Programmable Indicators: Blue/Green bi-color LED and programmable audio buzzer.

Specifications Overview​

ItemSpecification
Generation4th Generation (USB NFC Reader IV)
Supported Protocols & TagsISO 14443 Types A & B (Parts 1–4), ISO 15693, ISO/IEC 18092 NFC, MIFARE®, FeliCa, SRI/SRIX, CTS, Innovatron, Picopass, Topaz
Operating Frequency13.56 MHz
Baud Rates106 / 212 / 424 / 848 kbps (ISO 14443); 26 / 53 kbps (ISO 15693)
Operating DistanceUp to 70 mm (depending on transponder geometry)
NFC Operating ModesSmart Card Reader/Writer, Keyboard Emulation, Card Emulation
SAM Slot1 × ISO 7816 Class A (5V) SIM slot (T=0, T=1 protocols, 13.4–1,250 kbps)
Extended APDU✅ Supported (Up to 64 KB)
Host InterfaceUSB 2.0 Full Speed (12 Mbps), CCID compliant
Dimensions / Weight98.0 × 65.0 × 12.8 mm / 79–89 g
CertificationsISO 14443, ISO 15693, PC/SC, CCID, CE, FCC, RoHS, REACH, Microsoft WHQL
OS CompatibilityWindows 10/11, Linux, macOS, Android, iOS / iPadOS 16+
Official DocumentationACR1552U Product Page, API Reference (PDF)

Comparison: ACR122U vs ACR1252U vs ACR1552U​

FeatureACR122UACR1252UACR1552U
Max ISO 14443 Speed424 kbps424 kbps848 kbps
Max Read Distance50 mm50 mm70 mm
ISO 15693 Vicinity Support❌❌✅ Full Support
Keyboard Emulation Mode❌❌✅ Built-in
SAM Security Slot❌✅✅ High-speed SAM
Extended APDU (64 KB)❌⚠️ Partial✅ Native Support
Why ISO 15693 Matters

ISO 15693 vicinity cards are widely deployed in library asset management, medical supply tracking, and industrial inventory tags. The ACR1552U allows one unified reader to process both standard access cards (ISO 14443) and inventory tags (ISO 15693).

Application Architectures​

Installation & Setup (Linux + macOS)​

The ACR1552U communicates over standard USB CCID PC/SC protocols.

Step 1: Install PC/SC Packages (Linux)​

sudo apt update
sudo apt install -y pcscd pcsc-tools libpcsclite-dev libccid

Step 2: Verify USB Enumeration​

lsusb | grep -i "072f"

Expected output:

Bus 001 Device 005: ID 072f:2300 Advanced Card Systems, Ltd. ACR1552U Reader

Step 3: Run pcsc_scan​

pcsc_scan

Presenting an ISO 15693 tag or ISO 14443 badge will display the ATR and protocol type in real time.

Quickstart: Python pyscard Script​

from smartcard.System import readers
from smartcard.util import toHexString

r = readers()
if not r:
    print("No PC/SC readers found.")
    exit(1)

reader = r[0]
print(f"Using Reader: {reader}")

conn = reader.createConnection()
conn.connect()

# Query ISO 14443 UID
GET_UID = [0xFF, 0xCA, 0x00, 0x00, 0x00]
data, sw1, sw2 = conn.transmit(GET_UID)

if sw1 == 0x90 and sw2 == 0x00:
    print(f"Card Serial / UID: {toHexString(data)}")
else:
    print(f"Status: {sw1:02X} {sw2:02X}")

Troubleshooting​

1. ISO 15693 tags not responding to standard APDU​

  • Cause: ISO 15693 tags utilize distinct command structures from ISO 14443 Type A cards.
  • Fix: Consult the ACS ACR1552U Reference Manual for specific ISO 15693 transparent command wrapper formats.

2. Keyboard Emulation not outputting keystrokes​

  • Cause: Reader is configured in standard PC/SC mode rather than HID Keyboard Emulation mode.
  • Fix: Use the ACS Configuration Tool to enable Keyboard Emulation and configure desired delimiter characters (e.g., Enter or Tab).

3. SAM communication errors​

  • Cause: SAM card mismatch or improper seating.
  • Fix: Ensure standard ISO 7816 Class A (5V) SIM form-factor SAM is properly inserted.