Description

The MTL 8715-CA-BI is a rugged, dual-channel intrinsically safe (IS) barrier designed for CAN (Controller Area Network) applications in explosive atmospheres. Part of MTL Instruments’ 8700 series, this module bridges critical communication between hazardous-area CAN devices (e.g., sensors, actuators) and safe-area control systems. Certified for Zone 0/1/2 and Division 1/2, the MTL 8715-CA-BI ensures energy limitation to prevent ignition while maintaining signal integrity at speeds up to 1 Mbps. Its galvanic isolation (1.5 kV) protects against ground loops and transient surges, making it essential for safety-critical networks in oil/gas, mining, and heavy machinery.

Engineered for SIL 2 applications per IEC 61508, the module supports both CAN high (CANH) and CAN low (CANL) signals with independent fault detection. The MTL 8715-CA-BI features screwless terminal blocks for tool-free wiring and DIN-rail mounting for seamless integration into control cabinets. With built-in diagnostics for open-circuit and short-circuit conditions, it enables predictive maintenance while meeting ATEX/IECEx requirements for gas groups IIC and IIB+H₂.

Technical Specifications

Main Features and Advantages

Explosion safety & reliability:
The MTL 8715-CA-BI employs energy-limiting circuits certified for Zone 0—the most stringent hazardous area classification. Its dual-channel redundancy ensures continuous CAN communication during single-channel faults. Galvanic isolation (1.5 kV) eliminates ground loops and protects against lightning-induced surges up to 1.5 kV.

Simplified integration:
Tool-free spring-clamp terminals reduce installation time by 50% versus screw terminals. LED indicators provide real-time status for power, channel activity, and faults. The MTL 8715-CA-BI supports CAN 2.0B protocols and integrates with MTL’s SurgeShield™ technology for overvoltage protection.

Diagnostic intelligence:
Automatic short-circuit detection (<1>

Application Field

The MTL 8715-CA-BI enables secure CAN networking in high-risk environments. In offshore platforms, it isolates subsea valve controllers and gas detectors. Mining operations deploy it for collision avoidance systems in explosive methane atmospheres.

For industrial vehicles, the barrier protects CAN-based engine control units (ECUs) in LNG-powered forklifts operating in Division 2 zones. Chemical plants leverage it for agitator speed monitoring in reactor vessels. The MTL 8715-CA-BI also secures robotic safety interlocks in paint spray booths and grain handling conveyors where combustible dust necessitates ATEX/IECEx compliance.

Related Products

MTL 8716-CA-BI: 4-channel CAN barrier for high-node networks.

MTL 7787-CA: Zener barrier for CAN, suitable for Zone 2.

MTL 8380-BI-DP: DeviceNet isolator with SIL 3 rating.

MTL 5541: Surge protector for CANopen networks.

MTL 5042: Redundant power supply for barrier systems.

MTL 4510: Ethernet surge protector for control rooms.

MTL F909: Fieldbus power conditioner for CAN hubs.

Installation and Maintenance

Pre-installation preparation: Verify CAN network termination (120 Ω resistors at ends). Ensure the MTL 8715-CA-BI is grounded to a low-impedance earth bar (<0>

Maintenance recommendations: Test barrier functionality annually using MTL’s IS-BAR software. Check terminal tightness during shutdowns. Replace fuses only with MTL-specified components (part #F1001). Monitor LEDs monthly: red lights indicate channel faults requiring immediate investigation. Clean ventilation slots biannually with compressed air (<30>