Overview
WT5500 2-way wire-free keypads are the primary operator interface for IMPASSA SCW9055/9057 self-contained systems — not Keybus or Neo Corbus devices.
Panel bus / link type
IMPASSA integrated wireless
At a Glance
| Detail | Value |
|---|---|
| Product type | Alarm keypad / operator interface |
| Model family (WT5500, WT5500P, WT5500-433) | See label and install manual |
| Bus / wireless link | IMPASSA integrated wireless |
| Primary manual | WT5500 Installation Manual v1.1 |
| Region / listing notes | 433 MHz IMPASSA — up to 4 WT5500 keypads per system |
Before You Install or Replace One
- Confirm exact model number on the keypad label matches the install manual.
- Verify host panel family — Keybus PowerSeries, Neo Corbus, MAXSYS Combus, and IMPASSA wireless are not interchangeable.
- Plan unique keypad address or wireless enrollment — duplicates cause bus collisions or offline devices.
- Check partition assignment (global vs partition keypad) for multi-partition sites.
- Include keypad current draw in panel AUX / Corbus / battery standby calculations.
Official Sources
- Product page: DSC 2-Way Wire-Free Keypad (ID 60)
- WT5500 Installation Manual v1.1 — DSC official documentation
Troubleshooting
Start with host panel family, then keypad model, then bus vs wireless link.
Quick diagnostic flow
- Confirm keypad model matches WT5500 Installation Manual v1.1.
- Verify host panel is on the supported list in compatible-peripherals.md.
- Check power: panel AC/battery healthy before blaming keypad.
- Read troubles at keypad with **
[*, 2]** or trouble LED. - Verify address / enrollment — wired:
[013]Keybus or[902]Corbus; wireless: enroll window and transceiver online. - Test with known-good user code on assigned partition.
Wiring / bus
- Keybus: homerun, polarity, termination; one bad keypad can drag bus if shorted.
- Corbus/Combus: homerun from panel module; check AUX/Corbus voltage under load.
- Wireless: battery, range, antenna, transceiver supervision on panel first.
IMPASSA WT5500
- First keypad must enroll within ~2 minutes of power-up — documented IMPASSA behavior.
- WT5500P adds prox — tamper on reader plate separate from keypad tamper.
- Not serviceable on PowerSeries or Neo — wireless protocol is IMPASSA-only.
WT5500 enrollment (install manual)
- Power panel — AC/Ready flash ~2 minutes for first keypad enroll.
- If missed, power-cycle and retry within window.
- Enroll order: keypad → sirens → sensors → keys.
After keypad replacement
Re-assign address, partition visibility, and user PINs per manual — new keypad does not inherit old device programming automatically.
Source: WT5500 Installation Manual v1.1; host panel installation guide keypad sections.