Features

Nema 7 Explosion Proof Enclosure

Large Graphic display with backlight
(240 x 128 Pixels)

Optional Historical data Logging with Real time clock calendar

Digital 2 way communication with main control panel using RS485 Serial I/O

Programmable sensor location or tags

Relays contacts for Low, High and sensor fail alarms.

Optional Wireless Radio Interface Module or Fiber Optics data converter for noisy environment.

Reset / Bypass alarm of main control panel using front panel switches.

Description

Model PT750 Annunciator collects sensor data from all the control modules in a 900 Series Gas Control panel. Communication is RS485 half duplex between the annunciator and the control panel using a single pair twisted data cable. Maximum length of the cable is 4000 feet.

For noisy environment an optional Fiber Optics data converted is used to transmit and receive data over fiber optics cable. On board are 3 alarm relay contacts. The relays are activated whenever the main control panel is in alarm. Each channel / sensor can be programmed to have a sensor tag identifying each sensor with its location. Furthermore, using the switches on the front panel the alarms on the main control panel can be Reset or Bypassed