The right decision for your workplace.

Whether you are building a new facility or updating an existing one, there are a myriad of safety decisions to make. One decision, however, is now crystal clear. To best protect your workplace and employees, choose the 7800 Controller from 3M. This product brings to bear our more than 75 years of expertise in safety design and innovation. The 7800 Controller provides the ability to accurately monitor multiple gas and flame detection points from one location, thereby reducing installation costs.

Scalable, flexible, easy to use.

The 7800 Controller centralizes the display and alarm processing functions in critical multi-point gas and flame detection applications. Its modular design integrates easily with up to 32 gas or flame detectors and is available in a fiberglass or stainless steel NEMA-4X enclosure, a cast aluminum NEMA-7 explosion proof enclosure, as well as panel mount and 19" rack mount configurations. As your needs grow, the drop-in I/O boards of the 7800 Controller make upgrading the unit in the field quick and inexpensive.

Simple and intuitive user interface.

A graphic LCD display offers at-a-glance system status. The control screen offers you the ability to track gas concentrations in three different formats:

  Bar graph and numerical value of all active channels simultaneously
  24 hour trend screen (per channel)
  Combination 10 minute trend and bar graph (per channel)

Five simple function buttons make configuration and setup of the 7800 Controller easy and intuitive. Built-in programming flexibility allows you the ability to configure the controller to the needs of a wide variety of applications. Moreover, alarm LEDs indicate three levels of alarm status for every channel monitored.

Robust analog and MODBUS I/O capabilities.

Depending on the specific configuration chosen, the 7800 Controller can accept four different types of signals in any combination:

  4-20 mA from two or three simple wire transmitters
  Direct outputs from a direct Wheatstone bridge bead sensor
  Direct outputs from a direct IR sensor
  MODBUS® RTU RS-485 communications

Standard with the 7800 Controller is the ability to retransmit a MODBUS RTU RS-485 signal in both master and slave configurations. This allows up to 128 controllers to be multidropped onto a single data highway for interrogation by another MODBUS master. They may also be cascaded by connecting one unit's master port to another's slave port. In addition, optional 4-20 mA output boards allow communication with PLCs, DCSs or other control devices.

DOWNLOADS

Housings/Enclosures

093-0277 NEMA-4 Expansion Box (used in applications that require more option boards then the receiver can accommodate)

Misc Accessories

093-0307 Expansion mounting plate (accepts six Option Boards)
093-0220 Interconnect cable phone type

Batteries, Backups, Chargers, & Power Supplies

028-0033 24 V Power Supply (fiberglass box)
096-0719 Backup Power Supply, 24V 2.5Ah, complete w/rechargeable batteries & 120VAC charger Housing/Enclosures
093-0277 NEMA-4 Expansion Box (used in applications that require more option boards then 440 the receiver can accommodate)
093-0306 4 Position Expansion Steel Plate [white powered coat] w/ mounting standoffs (allows 125 additional option boards to be stacked above existing boards)
093-0307 Mounting Plate w/ standoff's for 6 position expansion board

Misc. Accessories / Spare Parts

093-0220 Interconnect cable phone type
087-0021 Sentinel 16 manual

Sentinel 16 (7800) Sub-Assemblies & Electronics Spares

093-0213 Display Board Assy with cable (Sentinel 6)
093-0312 I2C 10ft cable Assy - used in interconnecting option boards when they are separated by more than three feet.
093-0276 RS-485 to RS-232 Converter (7800-to-PC)
093-0271 Catalytic Bead Input Board - requires the addition of 093-0297 two channel catbead modules. An input Board accepts four, two channel modules (8 inputs).
093-0270 Analog Output Board
093-0269 Relay Board
093-0268 Analog Input Board
093-0267 Display Board Assy with cable (Sentinel 16)
093-0297 Dual channel cat bead module
093-0222 Aux Common Relay Brd (mounts to 093-0216 main I/O PCB)
093-0216 I/O Controller Board
093-0568 I/O PC Board for the Rack/Panel mount
028-0034 Power Supply, 24 VDC/150Watt
093-0337 7800 Power Distribution Terminal Board

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