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PT920-16SS Gas Monitor
Features
- Microprocessor based Control modules
- Three (3) Programmable alarm relays
- Sixteen (16) Sensor / Channel Capacity
- RS-485 MODBUS RTU Serial Communication
- PLC and SCADA Compatibility
- Alarm Status LED Indicators
Description
Model PT920-16SS is a microprocessor-based modular controller that provides up to sixteen (16) channels of continuous gas detection. The controller is housed in a Nema 4X Stainless Steel enclosure. Each PT920 Series toxic or combustible gas control module can be interfaced with Pem-Tech’s gas sensors. The control modules provide digital display and programmable alarm relay contacts.
Low power RISC based microprocessor allows all the alarm levels and control module address programmed via switches on the front panel. The bright LED display indicates the gas concentration. Also features amber and red LED indicators for alarm status. One of the safety features is a flashing digital display when the control module is in alarm bypass mode. The flashing display is an indication to the personnel in the control room about the alarm bypass status.
Each control module has RS-485 MODBUS RTU serial communication compatible with PLC’s, SCADA, and DCS systems. The module provides complete status like current gas concentration, sensor calibration and current alarm status. The alarm levels can also be accessed and programmed via MODBUS communication.
Specifications
- Electrical Classification
- Nema 4X Stainless Steel Enclosure with clear viewing window.
- (Optional Purge kit for pressurized enclosure for use in hazardous locations)
- Capacity
- Up to 16 PT920 Series Control Modules, toxic or combustibles.
- Front Panel Indicators
- 2 Bright LED digital display
- 4 each Alarm LED Indicators
Amber for Low Alarm, Red for High, High-High and fault - Flashing digital display if module in alarm bypass mode.
- Test & Safety Features
- Displays programmed alarm levels. Flashing alarm LED indicators upon unit power up to check integrity of display and LED indicators
- Operating Temperature
- -40°F to +158°F (-40°C to +70°C)
- Operating Humidity
- 5% to 100% RH, non-condensing
- Mechanical Specifications
- Height: 19 inches (482 mm)
- Width: 16 inches (406 mm)
- Depth: 10 inches (254 mm)
- Weight 35 Lbs. (16 Kg)
- Approvals
- Enclosure: Nema 4X UL
- Control Modules: ABS Type approved
- ABS Rules: 1-1-4/3.7, 4-8-3/tbl 2, 4-8-3/1.7
- Input Power
- 14-28 VDC. 24 VDC nominal
- DC Power Consumption
- 40mA @ 24VDC nominal
- 90mA max. with alarm active relays.
- Alarm Relays
- Low, High & High-High alarm relays.
- Fully programmable zero to full scale range. Latching or non-latching, normally open or normally-closed contacts.
- Relay Ratings
- SPDT Form “C” type Relay contacts
- 5 Amps @ 250 VAC or 30 VDC
- Auxiliary Alarm Relay Assembly (Optional)
- Four (4) each alarm relay contacts
- Each relay rated 10Amps @ 125 VAC /
28 VDC
- Peripheral & Interface
- RS-485 MODBUS® RTU Compatible with PLC’s, SCADA and DCS systems. MODBUS registers defined in the control Module: Gas concentration, current alarm levels and alarm status, sensor calibration mode, Remote alarm Reset and Bypass.
- Annunciator model PT750 for remote
readout
For more information on the PT920-16SS Gas Monitor, please contact Pemtech today. If you are looking for different features, please take a look at our other single channel controllers.