Simplex Truealarm
Simplex Truealarm 4098-9792, Standard Smoke detector Base $50.00
Simplex Truealarm 4098-9791, 4-Wire Addressable Smoke Detector Base $95.00

4098-9789 Simplex TrueAlarm sensor Base | wired connections

$35.00

Specifications

The 4098-9789 wired-connection base provides a practical, TrueAlarm-ready foundation for Simplex analog smoke and heat sensors with optional remote indicator or 4098-9822 relay wiring flexibility.

  • Model: 4098-9789 TrueAlarm Sensor Base
  • Type: Wired-connection sensor base
  • Compatible Sensors: 4098-9714, 4098-9733, 4098-9717 TrueAlarm analog sensors
  • Auxiliary Options: 2098-9808 remote LED indicator or 4098-9822 relay
  • Relay Supervision: Unsupervised (when 4098-9822 is used)
  • External Power: Required for 4098-9822 relay (separate 24 VDC)
  • Compatibility Note: Not compatible with 2120 CDTs
  • Mounting: 4″ octagonal or 4″ square electrical box
  • Box Depth: Determined by total wire count and gauge
  • Material: Flame-retardant thermoplastic
  • Application: Commercial fire alarm sensor mounting
  • Finish: Standard Simplex off-white

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Simplex Truealarm
4098-9789 Simplex TrueAlarm sensor Base | wired connections
$35.00

4098-9789 Simplex TrueAlarm Sensor Base | Wired Connections

The 4098-9789 Simplex TrueAlarm Sensor Base is a wired-connection base purpose-built to host Simplex TrueAlarm analog sensors, including 4098-9714, 4098-9733, and 4098-9717 models. It includes dedicated terminals for connecting either a 2098-9808 remote LED alarm indicator or a 4098-9822 unsupervised relay, offering flexibility for site-specific annunciation or auxiliary switching needs. Unlike supervised relay bases, the 4098-9789 is a cost-effective option for installations where an unsupervised relay plus a separate 24 VDC source is acceptable, and it is not intended for use with 2120 CDTs. It installs into 4″ octagonal or 4″ square boxes, with final depth determined by wire count and gauge.

Features

  • Wired terminal connections for flexible auxiliary device wiring
  • Supports remote LED alarm indicator for local visibility
  • Accepts an optional 4098-9822 relay for simple auxiliary switching
  • Hosts TrueAlarm analog sensors 4098-9714, -9733, and -9717
  • Cost-optimized profile compared to supervised-relay base variants
  • Low installation footprint suitable for 4″ octagonal or square boxes
  • Depth-flexible design accommodates mixed wire gauges

Benefits

The 4098-9789 brings value to projects where a straightforward wired-connection base is preferred over a full supervised relay design – especially in retrofits, refresh jobs, or budget-conscious commercial builds. By supporting either a remote LED or an auxiliary relay, it lets integrators tailor each location without changing the base hardware, which reduces SKU sprawl on multi-floor installations. Because addressing lives in the base, technicians can swap sensor heads during cleaning or replacement without revisiting the control panel for reprogramming. Its slim profile and depth-flexible box compatibility make it easier to install in older electrical boxes where space is tight, cutting labor time on upgrade jobs.

Why Choose QuickShipFire?

  • Focused stock of legacy-friendly TrueAlarm bases for service and replacement jobs
  • Clear upfront callouts about 2120 CDT incompatibility to prevent mis-ordering
  • Per-order wiring accessory recommendations based on your sensor count
  • Volume pricing on TrueAlarm base bundles for school, hospital, and office retrofits
  • Shipping prioritization for technicians who need same-day parts to close service tickets

FAQs

What's the functional difference between the 4098-9789 and the 4098-9780?
The 4098-9780 offers supervised, programmable relay action, while the 4098-9789 is a simpler wired-connection base intended for a remote LED or unsupervised relay.
Why is the 4098-9789 not compatible with 2120 CDTs?
The wired-connection topology of the 4098-9789 does not align with the supervision scheme used by 2120 TrueAlarm CDTs, so pairing the two is not supported by design.
If I use a 4098-9822 relay, what extra equipment is needed?
You will need a dedicated 24 VDC power source routed to the relay, since the 4098-9822 is unsupervised and does not draw operating power from the sensor loop.
Can I field-upgrade a 4098-9789 to a supervised relay setup later?
No direct field upgrade is available - upgrading to supervised relay operation requires physically replacing the base with a supervised model such as the 4098-9780.
What box depth should I specify for a 4098-9789 install with mixed wiring?
Box depth depends on total conductor count and gauge; QuickShipFire recommends reviewing the Simplex accessory list and defaulting to a deeper box when running auxiliary relay conductors.
Is sensor head replacement possible without pulling the base?
Yes, the plug-in sensor design lets technicians exchange 4098-9714, -9733, or -9717 heads without disturbing the wired base connections.
Can a 4098-9789 be reused after moving a sensor to a new room?
Yes, the base can be reused if it's still in good cosmetic and electrical condition, but the control panel's programmed location should be updated to reflect the new area.
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