Industry Specific 3M Standard Interchange Protocol v2.00 / NISO Z39.83 (NCIP)
3M SIP2 & NCIP Library Automation Protocols
3M SIP2 defines standardized ASCII message strings exchanged between library RFID self-service hardware and the central ILS database. It verifies patron barcodes, processes book check-ins, sets RFID EAS security bits, and handles overdue fines.
Layer / Stack
Application Protocol (TCP / Socket)
Default Port / Freq
TCP Port 6001 / 6002 (Telnet / Raw Socket)
Throughput / Speed
Sub-200ms transaction checkout and checkin speed
Standard Body
3M Standard Interchange Protocol v2.00
Core Protocol Architecture & Specifications
- ✓ Command 09 / 10: Item Check-in with instant patron account clearance and EAS bit reactivation
- ✓ Command 11 / 12: Patron Checkout with due-date assignment and EAS security deactivation
- ✓ Command 17 / 18: Real-time Item Information lookup (Title, Author, Call Number, Hold Status)
- ✓ Command 63 / 64: Patron Information and borrowing limit verification
- ✓ Native integration with Koha ILS, Ex Libris Alma, SirsiDynix Symphony, and LibSys
3M SIP2 Command 11 (Item Checkout) String Formatter & Checksum Calculator
csharp public class Sip2Protocol
{
public static string BuildCheckoutMessage(string patronBarcode, string itemBarcode, string terminalPassword)
{
string timestamp = DateTime.Now.ToString("yyyyMMdd HHmmss");
string nbData = DateTime.Now.AddDays(14).ToString("yyyyMMdd HHmmss"); // Due Date
// SIP2 Command 11: [11][Renewal:Y/N][NoBlock:Y/N][Date][NbDate][Institution][Patron][Item][TerminalPwd]
var msg = $"11YN{timestamp}{nbData}|AOUniversityLib|AAPATRON_{patronBarcode}|AB{itemBarcode}|AC{terminalPassword}|";
string sequenceAndChecksum = CalculateSip2Checksum(msg);
return msg + sequenceAndChecksum + "\r";
}
private static string CalculateSip2Checksum(string message)
{
int sum = 0;
foreach (char c in message) sum += c;
sum = (-sum) & 0xFFFF;
return $"AY0AZ{sum:X4}";
}
}Verified Hardware Implementations
Our engineering team has thoroughly tested and validated 3M SIP2 & NCIP across the following reader models, embedded modules, and smart transponders:
RFID Self-Checkout Kiosks 24/7 Outdoor Book Drop Chutes Staff Desktop Tagging Stations 3D Anti-Theft Security Pedestals
Target Deployments
- University central libraries
- Public municipal library networks
- Corporate research archives
- K-12 school digital libraries
Deploy with OpenRFID
Integrate 3M SIP2 & NCIP into your ERP, warehouse software, or custom mobile app with pre-built C# / C++ drivers.
How does SIP2 handle the RFID EAS security bit during checkout?
When a patron scans their library card and book stack, the kiosk sends SIP2 Command 11. Upon receiving an OK response from Koha, the kiosk hardware writer immediately sets the EAS byte to 0 (unlocked), allowing the patron to exit through security gates without setting off alarms.