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  Electro Signal Lab ES-505 Converter Module for panel 2 to 4 Wire
Electro Signal Lab ES-505 Converter Module for panel 2 to 4 Wire


Our Price : $43.45

Product Code: ES-505


The ESL 505 module serves as an interface between the ESL 521 series low profile self-diagnostic smoke detector and a UL Listed 12/24V DC control panel. The 505 is able to interpret the 521 series trouble (CleanMe) signal and provide an output to the control panel via relays. This signal allows users to receive a message locally (visual LEDs) and remotely at the central station that the 521 needs maintenance, such as cleaning, before a false alarm occurs. The 505 also indicates a "smoke detector trouble" signal if any hardware fault is detected. Depending on how the 505 is wired, the CleanMe signal can be sent to a separate panel zone or enunciated as a general fire trouble. If shown as a general fire trouble, the diagnostic LEDs on the module can be used to determine whether the trouble is a dirty smoke detector in need of servicing or loop fault.

The 505 module's interpretation of a 521 Series CleanMe signal can be read by any alarm control panel. Another feature of the 505 Module is that it can be used to convert any ESL two-wire smoke detector to four-wire inputs on any control panel. This is especially useful on retrofit applications and for panels that do not have two-wire smoke detector capabilities.


Powered from panels auxiliary power supply
Operation Voltage: 12V-33V DC
Alarm Current: 50mA +/-10%
Form A contacts: 500mA @36V CD (resistive)
Form C contacts: 2 Amps @28V CD or 120V CD(resistive)
Number of detectors/module: 20
Operating Temperature: -20 C to 55 C
Humidity: 0-95% non-condensing
RFI Immunity: .20V/M @ 0-1 ghz
Static Immunity: 25,000 V
Transient Immunity: 2500 V@ 1.5J
Color: white/white
Mounting: Mountable to 4" square, double gang boxes
Material: Flame retardant plastic cover (UL-94V-O)
Field wiring size: 12-24 AWG


Black Box: 2.75" (7.0 cm) H X 2.5" (6.4 cm) W X 1.25" (3.2 cm) D
Plate: 5" X 5"
  • Interprets ESL 521 smoke detector CleanMe signal for any panel
  • Allows central station to be notified when 521 needs to be cleaned
  • Converts any ESL 2 wire smoke detector to 4 wire inputs of any panel
  • 3 diagnostic LEDs
  • Ensures 2 wire compatibility with any control panel

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