Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the JOHNSON CONTROLS LP-XP91D04-000C Expansion Module. This module is designed as a Facility Explorer Extension, providing 4 Digital Inputs and 4 Digital Outputs for integration into building automation and control systems.
It is crucial to read and understand all instructions before attempting to install or operate this device. Retain this manual for future reference.
Safety Information
WARNING: This device should only be installed and serviced by qualified personnel. Failure to follow these instructions could result in personal injury, property damage, or damage to the equipment.
- Always disconnect power before installing or servicing the module.
- Ensure all wiring complies with local and national electrical codes.
- Do not operate the module outside its specified environmental limits.
- Protect the module from moisture, dust, and extreme temperatures.
Setup and Installation
The LP-XP91D04-000C module is designed for integration into a larger Facility Explorer system. Proper installation is critical for reliable operation.
For detailed installation instructions, refer to the official Johnson Controls Installation Guide XT/XP-91DOx, Part Number 24-85594-272, Issue Date 2605 or later. This guide provides comprehensive information on mounting, wiring, and system integration.
Physical Overview

Figure 1: Front view of the LP-XP91D04-000C Expansion Module. This image displays the module's front panel, including the "FACILITY EXPLORER" branding, "JOHNSON CONTROLS" logo, and indicators for Digital Inputs (DI1-DI4) and Digital Outputs (DO5-DO8). The model number "XP91D04" is also visible, along with the part number "LP-XP91D04-000C" and CE marking on a label.

Figure 2: Rear view of the LP-XP91D04-000C Expansion Module. This image shows the back of the module, featuring regulatory labels such as "ENERGY MANAGEMENT EQUIPMENT SUBASSEMBLY" and UL listing (E226431, LISTED 2HD3). Text indicating "For installation information see Installation Guide XT/XP-91DOx P/No 24-85594-272 Issue Date 2605 or later" is also clearly visible.

Figure 3: Bottom view of the LP-XP91D04-000C Expansion Module. This image displays the underside of the module, highlighting the mounting clips and overall casing design, which facilitates secure installation within a control panel or enclosure.
Wiring Connections
The module features terminal blocks for connecting digital inputs and outputs. Ensure proper polarity and secure connections for all wiring.
- Digital Inputs (DI1-DI4): These terminals are used to receive digital signals from external devices, such as sensors or switches.
- Digital Outputs (DO5-DO8): These terminals provide digital control signals to external devices, such as relays or indicators.
- Refer to the specific wiring diagrams in the Installation Guide for detailed connection procedures.
Operating Principles
The LP-XP91D04-000C module extends the capabilities of a Facility Explorer system by providing additional digital I/O points. Once properly installed and configured within the system, the module's digital inputs can be monitored, and its digital outputs can be controlled via the Facility Explorer software interface.
- Digital Inputs: These inputs typically detect the presence or absence of a voltage, representing states like ON/OFF, open/closed, or occupied/unoccupied.
- Digital Outputs: These outputs can be used to switch external devices on or off, activate alarms, or control simple binary functions.
Specific operational parameters and programming details are managed through the Facility Explorer system software, which is beyond the scope of this hardware manual.
Maintenance
The LP-XP91D04-000C Expansion Module is designed for reliable, long-term operation with minimal maintenance. However, periodic checks can help ensure optimal performance.
- Visual Inspection: Periodically inspect the module and its wiring for any signs of damage, loose connections, or corrosion.
- Cleaning: If necessary, gently clean the exterior of the module with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges to prevent premature failure.
No user-serviceable parts are inside the module. Do not attempt to open the casing.
Troubleshooting
If the LP-XP91D04-000C module is not functioning as expected, consider the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Module not responding | No power; Loose communication wiring; Incorrect system configuration. | Verify power supply; Check all communication cables for secure connections; Consult Facility Explorer system documentation for configuration. |
| Digital Input not reading correctly | Faulty sensor/switch; Incorrect wiring to input terminal; Input not configured correctly in software. | Test external sensor/switch; Check input wiring for continuity and correct polarity; Verify input configuration in Facility Explorer software. |
| Digital Output not activating | Faulty external device; Incorrect wiring from output terminal; Output not commanded correctly in software. | Test external device (e.g., relay); Check output wiring for continuity and correct polarity; Verify output command in Facility Explorer software. |
If problems persist after attempting these steps, contact Johnson Controls technical support or a qualified service technician.
Specifications
| Attribute | Value |
|---|---|
| Model Number | LP-XP91D04-000C |
| Description | Expansion Module, Facility Explorer Extension, 4 Digital Inputs, 4 Digital Outputs |
| Manufacturer | JOHNSON CONTROLS |
| Item Weight | 5.92 ounces |
| ASIN | B008HQ73VS |
| Date First Available | February 21, 2025 |
Warranty and Support
For information regarding product warranty, please refer to the official Johnson Controls warranty statement provided with your purchase or available on the Johnson Controls website. Warranty terms may vary by region and product type.
For technical support, service, or additional documentation, please contact Johnson Controls directly through their official website or customer service channels. Provide your product model number (LP-XP91D04-000C) and any relevant system details when seeking support.
Johnson Controls Official Website: www.johnsoncontrols.com





