The Simplex 4100-1272 Expansion Phone Controller is a dedicated module used to extend firefighter telephone control capabilities in Simplex 4100ES fire alarm and emergency communication systems. It provides three supervised Class B telephone NAC circuits for voice and firefighter phone operations in transponder installations.
| Condition | New/Never Used Surplus |
| Brand | Simplex |
| Category | Controls & Indicators |
| Part Number | 4100-1272 |
| Subcategory | Power Controller |
| System Compatibility | Simplex 4100ES Fire Alarm & Voice Communication Systems |
| Function | Expansion Telephone Control for remote transponders |
| Telephone Circuits | 3 Class B supervised circuits |
| Circuit Type | NAC – Notification Appliance Circuit (telephone) |
| Communication Interface | Simplex Remote Unit Interface (RUI) |
| Application | Firefighter two-way communication and voice system extension |
| Mounting | Internal mounting within MINIPLEX transponder enclosure |
| Input Power | 24 VDC nominal (from system power supply) |
| Supervision | Open, short, and ground fault detection |
| Indicators | Local LED status and fault indicators |
| Protocol | Digital communication with host 4100ES CPU |
| Construction | Printed circuit board with metal mounting plate |
| Compliance | UL 864, NFPA 72 |
| Dimensions | Approx. 10" × 6" × 1.5" |
| Weight | 3.00 lbs |
The 4100-1272 is an expansion module designed for use in 4100ES Audio and Voice Communication Systems. It enables additional firefighter telephone circuits to be installed within remote transponders connected to a host 4100ES control panel. Communication between the transponder and host is managed through Simplex Remote Unit Interface (RUI) communication links, ensuring full integration and supervision. The module converts received RUI data into the same internal communication protocol used by the host system, allowing seamless voice and control synchronization. Built to Simplex’s high standards, it ensures reliable firefighter communication during emergency events.
Key Features:
Expansion Controller: Adds additional firefighter telephone control capacity to 4100ES audio systems.
Three Class B Circuits: Provides three supervised Class B telephone NACs for field handset connections.
Transponder Integration: Required when telephone circuits are installed within 4100ES MINIPLEX transponders.
RUI Communication: Interfaces with the host control panel via Simplex Remote Unit Interface links.
Protocol Translation: Converts incoming RUI data into host-compatible communication formats.
Full Supervision: Monitors all circuits for opens, shorts, and device presence to ensure system integrity.
Panel Synchronization: Maintains consistent operation between transponder circuits and host 4100ES panel.
Emergency Audio Support: Works with Simplex voice evacuation systems for firefighter two-way communication.
Modular Installation: Mounts easily within the transponder enclosure alongside other 4100ES modules.
UL Listed Design: Meets NFPA 72 and UL 864 standards for fire alarm and emergency communication systems.
The 4100-1272 delivers dependable and scalable telephone circuit expansion for Simplex 4100ES fire alarm communication networks.