Overview
DSC door/window contact — magnetic reed switch for perimeter intrusion detection on wired or wireless loops.
Product type
Security sensor
At a glance
| Detail | Value |
|---|---|
| Category | Security sensor |
| Primary manual | Contact installation manual for your SKU |
| Install scope | Premises panel or bus device |
| Supervision | Panel trouble display when faulted |
What this device does in the system
Reports intrusion, life-safety, or status conditions to the host panel — faults appear as zone or module troubles, not always on the device itself.
Before you install or replace one
- Confirm exact model number on the label matches the install manual.
- Verify host panel or system family — Keybus, Corbus, Combus, PowerG, MX, or 433 MHz are not interchangeable.
- Check device limits on the panel/receiver before adding zones, sirens, or credentials.
- Include current draw in power budget calculations for modules, receivers, and keypads.
- For wireless: test RF at the mounted location, not only on the bench.
Official sources
- Product page: DSC Wireless Recessed Door Transmitter (ID 85)
- Contact installation manual for your SKU — DSC official documentation
FAQs
Which panels or systems does Wireless Recessed Door Transmitter work with?
See compatible-peripherals.md for the host compatibility table. Match bus type and wireless generation before ordering.
Why does the panel show a fault after install?
Usually enrollment, wiring, power, or tamper — read the active trouble on the panel ([*, 2] where supported) before replacing hardware.
Can I use this on a different brand panel?
Only if the install manual explicitly lists cross-brand compatibility — most DSC devices are family-specific.
Where is the official documentation?
DSC Wireless Recessed Door Transmitter (ID 85) — Contact installation manual for your SKU
How do I test after installation?
Complete walk test, supervision test, and (for wireless) placement test at the final mounted location — bench tests miss range issues.
Why false alarms on motion or glass-break?
Check pet immunity setting, mounting height, masking tabs, and environmental sources (heaters, sunlight, vibrating glass).
How long do wireless batteries last?
Typical 3–5 years depending on model and traffic — replace with listed battery SKU only.
Can one sensor work on two partitions?
Usually one partition per zone — reprogram in panel software if dual-partition assignment is supported for your model.