Overview
PK5500 full-message LCD and RFK5500/RFK5564/RFK5516 variants add 64-zone status, programming access, and optional 433 MHz wireless receiver on Keybus PowerSeries panels.
Panel bus / link type
Keybus (PowerSeries)
At a Glance
| Detail | Value |
|---|---|
| Product type | Alarm keypad / operator interface |
| Model family (PK5500, RFK5500, RFK5564, RFK5516) | See label and install manual |
| Bus / wireless link | Keybus (PowerSeries) |
| Primary manual | PK5500 Installation Manual v1.3; RFK5516 Installation Manual |
| Region / listing notes | 433 MHz RF variants — confirm regional frequency on label |
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 PK5500
- PK5500 Installation Manual v1.3; RFK5516 Installation Manual — 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 |
| Keybus Communication Fault | Panel lost keypad supervision | Homerun wiring, address conflict, AUX voltage |
| Cannot Enter Programming | Keypad lacks installer authority | Installer code [*, 8]; partition/global assignment |
| RF Receiver Fault | Keypad receiver not reporting | Antenna, enrollment, 433 MHz device compatibility |
PK5500 / RFK5500 family
| Display | Meaning |
|---|---|
OC / open zone icons | Zone open — normal Not Ready |
TR / trouble LED | Press [*, 2] for detail |
| RF low battery icon | Wireless device battery — scroll zone list |
RFK5564/RFK5516: receiver faults show before individual sensor faults.
PK5500 / RFK5500 keypad LEDs (install manual)
| LED | Color | Meaning |
|---|---|---|
| Ready | Green | System disarmed and ready |
| Armed | Red | Partition armed |
| Trouble | Yellow | Active trouble — press [*, 2] |
| AC | Green | Primary power present |
RFK55xx: additional wireless receiver faults show on panel before individual sensor low-battery icons.
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: PK5500 Installation Manual v1.3; RFK5516 Installation Manual; host panel user/install manual trouble sections.
| Code | Meaning | Suggested Fix |
|---|---|---|
| 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 |
| Keybus Communication Fault | Panel lost keypad supervision | Homerun wiring, address conflict, AUX voltage |
| Cannot Enter Programming | Keypad lacks installer authority | Installer code `[*, 8]`; partition/global assignment |
| RF Receiver Fault | Keypad receiver not reporting | Antenna, enrollment, 433 MHz device compatibility |
| Display | Meaning | |
| `OC` / open zone icons | Zone open — normal Not Ready | |
| `TR` / trouble LED | Press `[*, 2]` for detail | |
| RF low battery icon | Wireless device battery — scroll zone list | |
| LED | Color | Meaning |
| Ready | Green | System disarmed and ready |
| Armed | Red | Partition armed |
| Trouble | Yellow | Active trouble — press `[*, 2]` |
| AC | Green | Primary power present |