POTTER PSA Addressable Photoelectric Smoke Detector User Manual
- June 9, 2024
- POTTER
Table of Contents
POTTER PSA Addressable Photoelectric Smoke Detector
Features
- Low profile, less than 2 inches with the base
- Wide selectable sensitivity range of 1.05 to 3.82%/foot
- Sensor communicates sensitivity to control panel
- UL listed smoke calibration and sensitivity
- Optional locking tab to prevent unwanted removal
- Simple and accurate address setting without mechanical switches
- LEDs for 360° viewing
Description
The Photoelectric Smoke Sensor is a listed Analog Addressable smoke sensor
compatible with any fire alarm control panel that has the Potter/Nohmi
protocol. The PSA is a low profile smoke sensor with a wide sensitivity range.
The sensor and base (not included) are made of a durable plastic in an
eggshell white to blend in with the ceiling.
The PSA has a sensitivity range of 1.05 to 3.82% per foot and is UL and cUL
listed. The PSA may be configured for drift compensation and has built in
dirty detector warning as well as. The PSA and
the control panel communicate over a proven and robust digital communication
path and the system analyzes the level of alarm at the particular device. The
total polling speed is less than five (5) seconds, well under the UL
requirements.
The PSA has two LEDs that allow for 360° viewing. The sensor is compatible
with any of the Potter/Nohmi bases and simply twists on. The PSA is addressed
using the hand held programmer or the control panel addressing function.
Air Velocity Ratings
The PSA has an Open Area of Protection air velocity rating of 0 to 300 feet
per minute.
The system has a maximum of 13 LEDs that can be turned on simultaneously. If
the system already has 13 LEDs on, the PSA will operate even though the LED
will not illuminate.
Setting the Address
Each addressable module, smoke sensor, heat detector and combination
sensor/detector must have the address set before connecting the device to the
SLC loop. The address is set using the hand held device programmer or the
addressing feature on the control panel.
Before connecting a device to the SLC loop, take the following precautions to prevent potential damage to SLC or device. Verify the following:
- Power to the device is removed
- Field wiring is correctly installed.
- Field wiring has no open or short circuits.
Document discrepancies and notify appropriate personnel.
Specifications
| Item | PSA |
|---|---|
| Working voltage range | 22.0 to 24.0 V |
| Standby current | 325 µA |
| Alarm indicator | 2 LEDs |
| Alarm indicator current | 1.2 mA D.C. |
| Alarm set-point range | 1.05 to 3.82 %/ft / 3.4 to 12.0 %/m |
| Installation temperature range | 32 to 120 ° F / 0 to 49 ° C |
| Operating relative humidity range | 0% to 93% (Non-condensing) |
| Start-up time | Max. 1 sec. |
| Maximum number of addresses per loop | 127 |
| Maximum number of lighted indicators in alarm per zone. | 13 |
| Color | Eggshell White |
| Weight (without base) | 84g (2.96oz) |
| Dimensions (without base) | Height: 1.33 in (34mm) |
Diameter: 4.0 inches (99mm)
Approvals / Listings| UL, cUL, CSFM
Operation
The PSA is an analog addressable sensor that uses one address on the Signaling
Line Circuit (SLC) of a compatible fire alarm control panel. The unit
communicates with the control panel as it is polled. The LEDs flash every time
the unit is polled and they will latch steady if the unit is in an active
status.
The PSA is a proven design being in service throughout the world. The PSA with
the AB-4 or AB-6 base has a low profile of less than two (2) inches to blend
into the surrounding environment. The sensor includes an insect screen to
prevent foreign objects from reaching the chamber and the entire unit can be
cleaned with a simple vacuum.
Sensor Sensitivity
The PSA and the compatible control panel work in tandem to keep the
sensitivity consistent. As the sensor is installed over time, the sensor com-
pensates for the dirt in the unit until it is out of range. At that time, the
panel will indicate a dirty sensor. The sensor will then have to be cleaned or
replaced.
Anytime the PSA is being polled, the sensitivity may be viewed or printed from
the control panel.
Note: As required by NFPA, do not install the sensors until all construction
is complete and the work area has been thoroughly cleaned. If the
sensors have been installed in a construction environment, they should be
cleaned or replaced before the system is placed into service.
Spacing
The PSA is UL/ULC listed with a recommended maximum spacing of 30 feet. Refer to NFPA 72 for specific information regarding detector spacing, placement and special applications.
Compatible Bases
All bases will mount on a single gang, double gang, octagon, 4” square or mud
ring electrical box.
| Device | Description |
|---|---|
| AB-4 | 4” Standard Base |
| AB-6 | 6” Standard Base |
| AIB | 6” base with an isolator module included. The base is pre-wired with a |
pluggable jumper to the module.
ARB| 6” base with a dual relay module included. One relay is rated for 8 amps
at 240 VAC/30 VDC and the second is rated for 2 amps at 240 VAC/30 VDC. The
base is pre-wired with a pluggable jumper to the module.
ASB| 6″ base with sounder module included. Sound pattern is provided from
external source. The base is pre-wired with a pluggable jumper into the
module.
References
- Fire Alarm Resources | Download fire alarm documents
- Potter Electric: Fire Alarms & Fire Sprinkler Systems