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PT900-12SS Gas Monitor
Features
- Microprocessor based Addressable modules
- Discrete 4-20mA output
- Three (3) Programmable alarm relays
- RS-485 MODBUS RTU Serial Communication
- PLC and SCADA Compatibility
- Alarm Status LED Indicators
Description
Model PT900-12Ss is a microprocessor-based modular controller that provides up to 12 channels of continuous gas detection. The controller is housed in a Nema 4X weatherproof Stainless Steel enclosure. Each PT900 Series toxic or combustible gas control module can be interfaced with Pem-Tech’s gas sensors. The control modules provide digital display, discrete 4-20mA analog output and programmable alarm relay contacts.
The 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.
Specifications
- Electrical Classification
- Nema 4X Stainless Steel Enclosure
- Outdoor weatherproof
- Capacity
- Up to 12 PT900 Series Control Modules, toxic or combustibles.
- Front Panel Indicators
- 2 Bright LED digital display
- 4 each Alarm LED Indicators
- Flashing digital display if module in alarm bypass mode.
- Test & Safety Features
- Displays programmed alarm levels with flashing alarm LED indicators upon unit power up to check the 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: 24 inches (610 mm)
- Width: 24 inches (610 mm)
- Depth: 10 inches (254 mm)
- Weight 52 Lbs. (24 Kg)
- Input Power
- 110/220 VAC . Standard
- 18-28 VDC (Battery backup systems)
- Alarm Relays
- Low, High & High-High alarm relays.
- Fully programmable from zero to full scale range. Latching or non-latching.
- Relay Ratings
- SPDT Form “C” type Relay contacts
- 5 Amps @ 250 VAC or 30 VDC
- Auxiliary Alarm Relay Assembly
- Four (4) each alarm relay contacts
- Each relay rated 10Amps @ 125 VAC or 28 VDC
- Analog Output
- Discrete 4-20mA (300 Ohms max. Load.
- 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
- Approvals
- Enclosure UL
- Control Modules: ABS Type approved
- ABS Rules: 1-1-4/3.7, 4-8-3/tbl 2
4-8-3/1.7
For more information on the PT900-12SS Gas Monitor, contact Pem-Tech. If this monitor does not meet your needs, take a look at Pem-Tech's other single channel controllers.