Alarm Garage Reed and PIR Wiring Diagram
Alarm Garage Reed and PIR Wiring Diagram explains a typical alarm wiring diagrams layout. It is designed to help you understand how the major parts connect, what cable is commonly used and what should be checked before fit-off and commissioning. Alarm work becomes far easier to service when cables are consistently labelled by zone, location and device type.
Diagram overview
The diagram above shows the logical relationship between field devices, control equipment, power sources and user interfaces. Adapt the layout to suit the actual brand, terminal names, distance and site conditions.
What cable is commonly used?
The table below lists common cable choices for this type of system. Treat these as typical Australian industry choices rather than universal rules.
| Connection | Common cable | Typical purpose | Notes |
|---|---|---|---|
| PIR detectors | 6 core stranded alarm cable | Power + alarm + tamper | Many installers still use 6 core as a flexible standard. |
| Door reed switches | 4 core alarm cable | Zone + tamper where required | Some simple contacts use fewer conductors. |
| Keypad bus | 4 core or 6 core alarm cable | Data/power bus from panel to keypad | Follow panel maker cable and distance rules. |
| External siren/strobe | 6 core alarm cable | Trigger, hold-off and tamper | Check current draw and fuse sizing. |
| Monitoring communicator/network | Cat5e/Cat6 or serial cable as required | IP or data connection | Depends on communicator type. |
Step-by-step installation approach
A sensible workflow reduces mistakes and produces better documentation. The following sequence is a practical starting point.
Review the scope for alarm garage reed and pir wiring diagram and list every field device, controller, power supply, rack item and interface that needs to appear on the drawing.
Mark the physical locations on a site sketch so cable routes, service access and cabinet positions are clear before any cable is pulled.
Choose the cable type for each link based on power, data, distance, environment and manufacturer requirements rather than guessing or standardising everything to one cable.
Run and label each cable clearly at both ends. Use a naming convention that matches the diagram, cable schedule and equipment labels.
Terminate devices carefully and confirm terminal naming, polarity, shield handling, reader bus or PoE requirements before powering the system.
Test continuity, link status and basic device operation before final dressing and permanent fixing. This saves major rework later.
Commission the full system, confirm power loads, lock behaviour, monitoring logic or network settings, and record any variations from the original concept.
Update the final as-built diagram and keep it with the job records so the next technician can fault-find or expand the system efficiently.
Tools, materials and checks
Useful items on hand
- Label printer or marker system
- Cable tester / network tester as appropriate
- Manufacturer installation manual
- Basic hand tools and termination tools
- Site plan or sketch for route marking
- Notebook or digital cable schedule
Before you power up
- Confirm voltage and polarity.
- Check PoE class and total switch budget if relevant.
- Verify lock type, relay logic or monitored input behaviour where relevant.
- Check cable labels against the diagram and schedule.
- Make sure pathways are protected and weather suitable.
- Photograph the final terminations for future reference.
Common mistakes to avoid
- Using the wrong cable type because the device only looked similar to another one.
- Ignoring distance limits, voltage drop or PoE budget calculations.
- Forgetting that lock power, relays and monitored inputs often need separate planning.
- Leaving cables unlabelled or relying on memory for panel, switch or controller ports.
- Skipping the as-built update after the commissioning stage.
Frequently asked questions
Can I use Cat6 for everything?
No. Cat6 is excellent for IP and PoE devices, but alarms, reader buses, lock circuits, 2-wire intercoms and power feeds often need different cable types.
Do I still need the manufacturer manual?
Yes. This page is a practical guide, but terminal naming, current draw, address settings and approved cable types must always be confirmed in the actual product documentation.
Should I create a cable schedule as well as a diagram?
Absolutely. A cable schedule makes installation, testing, handover and future maintenance much easier.