Alarm Panel and Security System Integration
The IOTA International SQR 117 (SQR117) 12V DC Piezo Siren is engineered to integrate across standard electronic security platforms, intrusion alarm control panels, and multi-zone annunciator systems. Operating across a wide DC input threshold of 10V to 30V DC with a nominal rating of 12V DC, the sounder connects directly to auxiliary alarm bell outputs, switched 12V auxiliary power terminals, and transistorized open-collector siren outputs found on residential and commercial security alarm panels.
With a low current consumption of only 80 mA at 12V DC, the SQR 117 minimizes the electrical load placed on centralized control panel auxiliary power buses. This minimal current draw allows system integrators to deploy the siren directly on standard control panel siren outputs without exceeding panel current supply limits or triggering auxiliary power supply fault conditions during alarm activation.
Industrial Automation and PLC Circuit Compatibility
For industrial automation panels and process warning alert stations, the SQR 117 interfaces directly with Programmable Logic Controller (PLC) DC digital output modules and auxiliary control relay circuits. Because the unit accepts power up to 30V DC, it functions reliably within 24V DC industrial control loops without requiring step-down voltage regulators or external series resistance.
The two-wire DC leads connect to dry contact relay outputs, solid-state relays (SSRs), and industrial interface relays driven by PLCs, DCS controllers, and process interlocks. When configuring PLC logic or timer relays for process alerting, system designers must observe the maximum 20-minute continuous run-time limit at normal room temperature to prevent thermal stress on the internal piezoelectric driver.
Access Control Boards and Emergency Station Interfacing
The SQR 117 serves as an audible signaling device across access control platforms, emergency panic stations, and facility alert networks in commercial facilities, banks, warehouses, and factories. The unit readily interfaces with:
- Access Control Sub-Controllers: Direct connection to door-held-open, forced-entry, and tamper alarm relay outputs.
- Emergency Panic Switch Circuits: Wired directly through latching or momentary dry contact panic buttons supplied by a 12V DC or 24V DC backup power source.
- Sheltered Facility Enclosures: Fits neatly within industrial control cabinets, auxiliary power supply cans, and surface junction boxes using the integrated ABS 300 mounting bracket.
Power Source and Interface Compatibility Matrix
The polarity-sensitive two-wire connection requires correct DC positive and negative termination to deliver full 110 dB sound pressure output at 1 meter. The table below outlines electrical interface parameters across standard system configurations:
| Host System / Source | Operating Voltage Range | Typical Current Draw | Integration Interface Type |
|---|---|---|---|
| Security Alarm Control Panels | 10V–15V DC (12V Nominal) | 80 mA (at 12V DC) | Switched Auxiliary Bell / Siren Outputs |
| Industrial PLC Automation Panels | 20V–30V DC (24V Nominal) | ≤ 80 mA | Dry Contact Relay / 24V DC Digital Output |
| Access Control Controllers | 12V DC / 24V DC | 80 mA (at 12V DC) | Form C / NO Relay Trigger Contacts |
| Automotive & Backup Battery Systems | 10V–30V DC Sealed Lead-Acid | 80 mA (at 12V DC) | Direct Battery / Vehicle Auxiliary Circuit |
