D461R1

Isolating Barrier for A5S1… Ex ia sensors in Hazardous Areas Zone 0-1

The BRAUN Isolating Barrier D461R1 is ATEX, UKEX, IECEx and KCs certified and approved for other international standards such as UL/CSA. So, it meets the particular requirements of explosion protection areas (zone 0 or 1).
In conjunction with one of our sensors series A5S1…, the Isolating Barrier establishes a highly efficient system to detect speed and/or direction in a hazardous area to supply high-level output signals to the periphery.
The barrier provides an intrinsic safety circuit for the sensor and its cabling and, therefore, does not require Ex d measures.

The signal input is isolated from the signal output. Both are isolated versus the power supply. The signal output of the unit repeats the input pulse signals with push/pull characteristics.
The signal input matches the specifications of the speed sensor series A5S1…, which are approved as intrinsic safety devices to be installed in hazardous area zone 0 or 1.
The sensor supply circuit is monitored, and a fault is signalized.

The barrier unit D461R1 must be installed in a safe (non-hazardous) area or within an explosion-proof (Ex d) enclosure.

Key Features

• For use in connection with A5S1… Ex ia series sensors
• Establishes a highly efficient system to detect rotational speed (and direction of rotation) in areas of explosion risk
• Provides intrinsic safety for the sensor and its cabling
• Comprehends sensor supply and signal connection
• Sensor supply monitoring
• Free-floating, therefore maximum immunity versus EMI
• Push/pull signal output to subsequent monitors
• Implementation outside the hazardous area, resp. protected by a pressure-resistant encapsulated housing
• Certification for
  • ATEX as Ex ia Ga IIC
  • UKEX as Ex ia Ga IIC
  • IECEx as Ex ia Ga IIC
  • KCs as Ex ia Ga IIC
  • QPS / QPSus as Ex ia Ga IIC for Class I, Div 1, Groups A, B, C, D according to UL and CSA standards

Benefits

• Maintenance-free during Lifetime, therefore minimized TCO
• No EMI influence compared to Zener barriers
• No signal degradation compared to Zener barriers
• Strong signal output to signal evaluation