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PT900-12FG 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 PT900-12FG 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 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 Fiberglass Enclosure,
Outdoor weatherproof
- Nema 4X Fiberglass Enclosure,
- Capacity
- Up to 12 PT900 Series Control
Modules, toxic or combustibles
- Up to 12 PT900 Series Control
- Front Panel Indicators
- 2 Bright LED digital display
4 each
Alarm LED Indicators Flashing digital
display if module in alarm bypass mode
- 2 Bright LED digital display
4 each
- 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
- Displays programmed alarm levels
- 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 40 Lbs. (18 Kg)
- Height: 24 inches (610 mm)
- Approvals
- Enclosure: CSA & UL
Control Modules:
ABS Type approved ABS Rules:
1-1-4/3.7, 4-8-3/tbl 2 4-8-3/1.7
- Enclosure: CSA & UL
Control Modules:
- Input Power
- 110/220 VAC . Standard
18-28
VDC (Battery backup systems)
- 110/220 VAC . Standard
18-28
- Alarm Relays
- Low, High & High-High alarm relays.
Fully programmable zero to full - scale range. Latching or non-latching
- Low, High & High-High alarm relays.
- 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 / 28 VDC
- Four (4) each alarm relay
- Auxiliary Alarm Relay Assembly (Optional)
- Four (4) each alarm relay
contacts Each relay rated
10Amps @ 125 VAC / 28 VDC
- Four (4) each alarm relay
- 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
- RS-485 MODBUS RTU Compatible
For more information on the PT900-12FG Gas Monitor, please contact Pem-Tech. If this gas monitor is not what you need, take a look at our other single channel controllers.