The Simplex 4010-9421 is a 120 V, red 4010ES fire alarm control unit in a two-bay enclosure. First, it adds expansion room for option cards and batteries. In addition, the larger box accepts the full 4010ES module family. Therefore, this version suits larger or growth-staged installations.
Dual IDNet Communications
The 4010-9421 ships with two IDNet communication channels onboard. Specifically, it includes one IDNet+ channel and one IDNet 2+2 channel. As a result, the panel doubles the addressable point capacity relative to single-channel siblings. Furthermore, the integrated 2×40 character LCD shows event detail in plain text.
Two-Bay Cabinet Advantages
The two-bay backbox provides space for an onboard NIC, SDACT, and battery shelf. Then, expansion power supplies can mount alongside the main CPU. In addition, the cabinet supports the standard 4010ES inner door layout. Therefore, technicians upgrade existing 4010 sites without rewiring.
Mid-Range Addressable Use Cases
Use the Simplex 4010-9421 in mid-range commercial projects with growth potential. However, single-bay layouts should choose the basic 4010-9403 or 4010-9402 instead. Furthermore, the red cabinet matches typical jurisdictional preferences for fire alarm equipment.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 92 lbs |
|---|---|
| Dimensions | 50 × 31 × 17 in |
| Condition | New |
| Manufacturers | Simplex |
| Part Type | Replacement Part |







