C-TEC CA742 CAST Addressable Loop Resistance Tester
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Technical documentation
PDFInstallation ManualCA742 CAST Loop Resistance Tester Installation Instructions
EnglishPDFCertification
CA742 EN 54-18 Third-Party Approval Certificate
EnglishPDFCertification
CAST CA742 Declaration of Conformity (EU)
EnglishPDFOther Document
CA742 Resistance Threshold Calculation and CAST ZFP Panel Configuration Application Note
English
The manufacturer has not published Turkish documentation for this product; please contact us for technical support in Turkish.
Product description
The CA742 monitors the integrity and series resistance of a C-TEC ZFP CAST addressable fire alarm loop, helping to identify faults caused by increasing resistance. It is installed at the end of the loop, and the resistance threshold can be set using a DIP switch; if the threshold is exceeded, it sends a fault message to the control panel.
Key features
- EN 54-13 loop integrity check
- Resistance threshold adjustable from 5–75 Ω in 5 Ω increments
- Sends a loop resistance fault message to the control panel when the threshold is exceeded
- Uses one CAST address
- Compatible with ZFP CAST addressable fire alarm systems
- Mounted in a single UK 25 mm flush-mounted box; must be installed outside the panel enclosure
Technical specifications
| Supply/operating voltage | 22–40 V DC |
|---|---|
| Standby current | <2 mA |
| Activation current | 7,3 mA (with the fault LED illuminated) |
| Resistance trigger range | 5–75 Ω; in 5 Ω increments |
| Indicator | Active: steady green; communications check: flashing green; high-resistance fault: yellow |
| Dimensions | 87 × 87 × 24 mm |
| Protection rating | IP40 (when correctly installed) |
| Operating temperature | −10 °C to +55 °C |
| Weight | 80 g |
| Approvals | EN 54-18 (ANPI); EN 54-13 and NTN 179-L:2021 (BOSEC) |
Information has been compiled from manufacturer/distributor sources. Please consult the documentation for current technical specifications.
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