Protectowire DRTB-T-2 digital rate-of-rise threshold board accessory for CTM-Series linear heat detection control modules.

Compliance

• FM Approved
• UL Listed

Key features

• Adds digital rate-of-rise thermal discrimination to PHSC linear heat detection cable circuits when used with CTM-Series controllers
• Humidity rated to 95% non-condensing for reliable operation in damp and industrial environments
• FM Approved for property protection applications subject to FM Global loss prevention requirements
• Plug-in board design enables field installation into CTM-530 Series control modules without rewiring
• Expands detection capability beyond fixed-temperature response for applications where rapid fire growth requires earlier intervention

Protectowire CTM-530 Series control modules manage the supervision and alarm processing for PHSC-Series linear heat detection cable circuits. The DRTB-T-2 threshold board adds digital rate-of-rise detection logic to the CTM module, enabling the system to alarm when the cable temperature rises at a rate exceeding the set threshold, independent of whether the fixed-temperature set point has been reached. This expands the detection envelope for fast-developing fire scenarios in cable trays, conveyor systems, and transformer rooms. The DRTB-T-2 is a plug-in accessory for CTM-530 Series modules; confirm compatibility with your specific CTM model before ordering.

Verify panel/device family compatibility before ordering.