Third-Party Access Control, Safety Loop, and Infrastructure Compatibility

The Swaraj Secutech ST-4 (ST4) automatic rising bollard is engineered for straightforward integration into complex industrial access control ecosystems, high-security perimeters, and vehicle checkpoint networks. Its core operation is driven by a programmable logic controller (PLC) architecture that natively interfaces with external automation hardware, physical security devices, and critical alarm triggers.

PLC Control Architecture and Third-Party System Interfacing

The bollard system utilizes an industrial PLC-based control unit designed to accept dry-contact commands, digital inputs, and output status relays from external access control devices. This allows security contractors and system integrators to directly link the ST-4 to various perimeter management hardware, including:

• Automatic Number Plate Recognition (ANPR / LPR) camera systems
• Long-range UHF RFID tag readers and vehicle transponders
• Biometric readers, access keypads, and card swipe terminals
• Manual push-button guard consoles and supervisory desk switches
• Centralized Building Management Systems (BMS) and physical security information management (PSIM) software

The normal operational sequence supports an adjustable raising and lowering cycle time of 5 to 6 seconds, which can be tailored directly in the control panel logic to synchronize with surrounding traffic arms or automatic boom barriers.

Safety Sensor and Loop Detector Interlocks

To prevent premature raising against authorized vehicles or moving pedestrians, the ST-4 control board incorporates dedicated inputs for dual safety interlocks:

• Magnetic Induction Loop Detectors: Integrate directly with inductive ground loops cut into the roadway pavement. The system detects vehicular presence and locks out upward travel commands while a vehicle straddles the cylinder array.
• Infrared Photocell Sensors: Deployed across the drive lane to safeguard humans and animals. If a pedestrian or animal crosses the active optical infrared beam while the bollard cylinder is in an upward transit cycle, the control logic triggers an immediate automatic lowering reversal.

Emergency Fast Operation (EFO) and Failsafe Compatibility

For hostile vehicle mitigation (HVM) checkpoints, the ST-4 accommodates dedicated emergency override inputs. An optional and customizable Emergency Fast Operation (EFO) trigger activates a high-speed deployment mode, raising the bollard to its fully extended position in 2 seconds to counter urgent breach attempts. For site safety during power outages or main utility failures, the drive unit features a built-in manual lowering valve mechanism, enabling security personnel to depress the cylinder and clear lanes for emergency vehicles without electrical current.

Electrical Supply and Drive Unit Specifications

The ST-4 bollard system can be specified with either a hydraulic or pneumatic drive unit under model codes ST4 (A/B)(H/P). Electrical mains requirements support facility power standards across industrial utility connections:

• 415 V AC, 3-Phase, 50 Hz
• 420 V AC, 3-Phase, 50 Hz
• 220 V AC, Single-Phase, 60 Hz

Perimeter Array Layout and Modular Co-Deployment

The ST-4 is compatible with mixed-barrier site designs, allowing automated hydraulic or pneumatic units to line up alongside fixed or removable ST4 (A/B)(F/R) units across the same roadway. Integrators can match mechanical variants according to site impact assessment ratings:

All variants share standardized visual alert hardware, including top-mounted red LED illumination arrays and reflective band profiles, ensuring uniform signaling compatibility across multi-bollard traffic lanes.