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 MX975 - MX Door/Window Contact (ID 2724)
- Contact installation manual for your SKU — DSC official documentation
Compatible Peripherals
This page lists which panels and systems this product works with — not unrelated sensors or keypads.
Host compatibility
| Host system | How it connects |
|---|---|
| PowerSeries with hardwired zones | Normally closed loop with EOL resistor |
| PowerSeries with RF5132/RFK receiver | 433 MHz wireless contact enrollment |
| PowerSeries Neo / Pro with PowerG | PowerG contact on transceiver network |
| IMPASSA / Alexor wireless | 433 MHz WT4xxx-series contacts |
Not compatible / common mistakes
- Wrong frequency wireless receiver
- Fire-only loop without intrusion programming
Replacement guidance
- Match model, frequency, and bus type to the removed device.
- Re-enroll wireless devices after replacement — ESN/serial changes with new hardware.
- Document zone/siren/device number for monitoring station handoff.
Source: Contact installation manual for your SKU (DSC official documentation).