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
Error Codes
Keypad and panel troubles display on this device using **[*, 2] (where supported) or dedicated trouble LEDs. Use the host panel install manual** for full trouble lists — below covers common keypad-specific symptoms.
Common keypad / operator faults
| Display / symptom | Meaning | First checks |
|---|---|---|
| Blank / dead display | No power or bus communication | AC, battery, bus wiring, keypad address, fuse |
| Keypad Tamper | Enclosure opened or tamper switch | Mounting plate, tamper jumper, cover fit |
| Cannot Arm / Not Ready | Open zones or active troubles | [*, 2] trouble scroll; close zones; clear troubles |
| Invalid Code / Access Denied | Wrong user code or authority level | User [5] programming; verify partition assignment |
| WT5500 / WTK Offline | Wireless keypad lost link | Range, enrollment, panel wireless reset, battery |
| Cannot Enter Programming | Keypad lacks installer authority | Installer code [*, 8]; partition/global assignment |
WT5500 wire-free keypad
| Condition | Fix |
|---|---|
| Keypad not enrolled | Power-cycle panel; enroll within 2-minute startup window |
| Keypad offline | Battery, range, max 4 WT5500 limit |
| Wrong partition shown | WT5500 partition assignment in [382] programming |
WT5500 wireless keypad
| Display / LED | Meaning |
|---|---|
| Keypad offline | Battery, range, max 4 WT5500 exceeded |
| Not enrolled | Missed 2-minute power-up window |
| Trouble scroll | [*, 2] — panel AC, battery, communicator |
WT5500P: prox tamper separate from keypad tamper.
Panel trouble reference
Keypads display panel-level troubles (AC loss, FTC, zone faults) — fix the underlying circuit or device, not the keypad, when [*, 2] points to panel/comms/zone issues.
Source: WT5500 Installation Manual v1.1; host panel user/install manual trouble sections.
| Code / display | Meaning | What to do |
|---|---|---|
| Blank / dead display | No power or bus communication | AC, battery, bus wiring, keypad address, fuse |
| Keypad Tamper | Enclosure opened or tamper switch | Mounting plate, tamper jumper, cover fit |
| Cannot Arm / Not Ready | Open zones or active troubles | `[*, 2]` trouble scroll; close zones; clear troubles |
| Invalid Code / Access Denied | Wrong user code or authority level | User `[5]` programming; verify partition assignment |
| WT5500 / WTK Offline | Wireless keypad lost link | Range, enrollment, panel wireless reset, battery |
| Cannot Enter Programming | Keypad lacks installer authority | Installer code `[*, 8]`; partition/global assignment |
| Condition | Fix | |
| Keypad not enrolled | Power-cycle panel; enroll within 2-minute startup window | |
| Keypad offline | Battery, range, max 4 WT5500 limit | |
| Wrong partition shown | WT5500 partition assignment in `[382]` programming | |
| Display / LED | Meaning | |
| Keypad offline | Battery, range, max 4 WT5500 exceeded | |
| Not enrolled | Missed 2-minute power-up window | |
| Trouble scroll | `[*, 2]` — panel AC, battery, communicator |
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.
Compatible Peripherals
This page lists which alarm panels this keypad works with — not sensors, modules, or communicators.
Host panels
| Host panel | Connection |
|---|---|
| IMPASSA SCW9055 / SCW9057 (433 MHz) | Wireless enrollment during panel startup window |
Related notes
- WT4989 wireless keys
- 433 MHz IMPASSA wireless sensors and sirens
Not compatible
- PowerSeries Keybus or Neo Corbus
- PowerG HS2LCDWF keypads
- Standalone use without IMPASSA panel
Replacement warning
Keypads are not universal across DSC generations. Confirm bus type, address programming section, and firmware before substituting another model.
Source: WT5500 Installation Manual v1.1 (DSC official documentation).
Installation Notes
Follow WT5500 Installation Manual v1.1 for mounting, wiring, addressing, and enrollment. Summary below — not a substitute for the full manual.
Pre-install checklist
- Match keypad SKU to host panel family (see compatible-peripherals.md).
- Select mounting height and tamper-secure back box per local code.
- Reserve bus power or confirm wireless transceiver capacity on panel.
- Plan partition and global keypad roles for multi-partition installs.
Typical install sequence
- Mount keypad back box and pull bus or confirm wireless coverage at location.
- Wire Keybus/Corbus homerun or begin wireless enrollment per manual.
- Assign keypad address in panel programming (
[013]PowerSeries,[902]Neo/Pro, DLS for MAXSYS). - Set partition assignment and display options.
- Test arming, disarming, trouble display, and prox/RF features if equipped.
- Document address, partition, and installer access for service handoff.
Regional notes
433 MHz IMPASSA — up to 4 WT5500 keypads per system
Source: WT5500 Installation Manual v1.1 (DSC official documentation).