Honeywell 4209U

V-Plex Group Zoning Remote Point Module

Honeywell 4209u v plex group zoning remote point module
  • Honeywell 4209u v plex group zoning remote point module
  • Honeywell 4209u v plex group zoning remote point module circuit

Average rating:

(based upon one review)

The Honeywell 4209U is a V-Plex grouping zone module that primarily serves as a way to provide additional 2-wire smoke detector loops to the panel. It supports up to 16 total 2-wire smoke detectors on each of its four loops. Buy the Honeywell 4209U V-Plex Group Zoning Module here.
List Price
Our Price
You Save


The Honeywell 4209U V-Plex Group Zoning Remote Point Module allows a user to add additional 2-wire smoke detector loops to the commercial polling loop alarm panel. This useful module can support a maximum of 16 different 2-wire smoke detectors on each of its four individual loops.

As a group zoning module, the 4209U will uniquely identify either four supervised zones in the non-grouped mode, or two supervised zones if used in grouped mode. The module's DIP switches are used to set zone numbers or serial numbers. When used in DIP switch mode, the DIP setting determines the zone numbers used. This mode should only be used with panels that will not support a serial number. In serial number mode, the DIP settings determine which row of serial numbers will be used from the Installation Instructions, and each input can be programmed to any polling loop zone number available.

The module also offers tamper protection, and can alert the system if anyone tries to remove the cover. For best performance, the module should be mounted inside an alarm control panel cabinet or some other type of separate enclosure. This will ensure proper protection of the device and prevent damage.

All protection zones used with 4209U should have a 2k EOL resistor. These come included with the module. Even in grouped mode, each set of terminals will still require its own 2k EOLR. Each one must be connected in parallel across the terminals at the last smoke detector used on the zone.

Note: This device requires its own power input in addition to the connection to the panel's polling loop. You will also need some type of switch or relay to momentarily interrupt the module's input power after a smoke alarm activation. This is necessary for resetting the smoke detectors and clearing any alarms. This can be done using an auxiliary relay or a 4204 relay.

Brand: Honeywell

Great V-Plex Expansion or Group Zoning Module!
Submitted on 12/04/2019 Alarm Grid

The Honeywell 4209U is a V-Plex Grouping Zone Module. Its main use is to provide additional zone inputs for 2-wire smoke detectors to be used with V-Plex Polling Loop Panels. This includes security panels from the Honeywell VISTA TURBO Series, like the VISTA 128BPT and the VISTA 250BPT. The Honeywell 4209U features four (4) individual zone inputs, and it can support up to 16 different 2-wire smoke detectors per zone. Overall, this product works very well in performing its intended tasks. We give it a perfect 5 Star rating.

The main thing to like about the Honeywell 4209U is that it increases the number of available 2-wire smoke detector zones. Zone 1 on the VISTA-128BPT and VISTA-250BPT panels can be used to support 2-wire smoke detectors. But if you need additional 2-wire smoke zone support, then this module is perfect for you. The module can be configured to uniquely identify four (4) supervised zones in non-grouped mode, or two (2) supervised zones in grouped mode. You can also choose between programming the module using Serial Number mode or Dip Switch mode. Dip Switch mode should only be used with older V-Plex Polling Loop Panels that don’t support the use of serial numbers.

There are some minor downsides to the Honeywell 4209U. For one, you need to use 2k EOL resistors with every protection zone. These resistors come included with the module, so that's convenient. But having to add them all is somewhat tedious. Still, this is a necessary evil to making sure no one is tampering with the life-safety zones on your expansion module. Additionally, you can only use the Honeywell 4209U with panels that support a V-Plex Polling Loop. This somewhat limits its versatility. But all things considered, these are minor drawbacks. We give the Honeywell 4209U 5 Stars.

Good: Increases Available 2-wire Smoke zones, Configurable for Grouped or Non-Grouped Settings, Choose Serial Number or Zone Number (Dip Switch) Programming

Bad: Requires 2k EOL Resistors at Each Protection Zone, For V-Plex Polling Loop Panels Only

Bottom Line: 5 Stars

Thank you for the prompt reply. I was afraid that would be the answer. And correct, I am certainly not UL certified, however, I was trying to adhere to the standards as much as possible despite not being able to actually UL certify the system. Once I get a little farther in the planing (and budgeting) process I will definitely reach out.
Matt, that statement means that if you are trying to achieve UL compliance, then you can not mix different detector models on a single system. To achieve UL compliance, every aspect of the installation must adhere to UL specifications, and I believe the system has to be installed by a UL certified technician. I guess my point is, if you're installing this yourself, you are probably not going to meet all the requirements for a UL certified system. That doesn't mean it's not a good guideline to follow. Compatibility of 2-wire smoke detectors is listed, and the numbers of detectors supported on each zone is determined by several factors. How much current is required for each device, does the smoke detector have a sounder built-in, etc. I would recommend that at the very least you install like-devices on each zone. Also, the wired combination smoke/co detectors can't be tied to a single zone. There is no way for the zone to tell if that device intends to signal CO or Fire. I know the system sensor combination devices are the COSMO-2W or COSMO-4W, and then each has a module that must interface between those detectors and the main panel (or in this case, the 4209U). To give more specific recommendations, we'd probably need a bit more detail on your intended setup.
I have an a VISTA 128FBP panel I want to connect this to for fire and burglary protection of a residence. The installation guide has a UL compliance statement in the first column of the first page. The first point says do not mix different model detectors on the same system. My plan was to have a combination of different System Sensor devices, depending on application -- some with CO and some without, some heat only. Does this statement mean I have to use the exact same model detector for all zones, or just do not mix and match detectors on the same 4209U panel?
* Based on a 10% APR with 12 months financing. APR's will vary between 10% - 30% based on credit score and various factors.