Classic Sentry 8 Channel Controller

Sierra Monitor’s Sentry Classic Controller provides a comprehensive plant-wide gas risk management system for monitoring combustible gas, Oxygen deficiency, and toxic gases to maintain safety in a plant.

Classic Sentry 8

Sierra Monitor’s Sentry Classic Controller provides a comprehensive plant-wide gas risk management system for monitoring combustible gas, Oxygen deficiency, and toxic gases to maintain safety in a plant.

The Sentry Classic Controller is a microprocessor-based system that includes management of the sensor modules, management alarm relays, interface with the user via the front panel display, printer output, Modbus digital communication, alarm indicators, and relay outputs.

8 channel Gas Detection controller

The controller has a user-friendly front panel that includes a large display of the gas concentration and sensor numbers. A series of alarm LEDs instantly inform the user of alarm status on any of the eight sensors interfaced to the controller. These LEDs are solid for low alarm and flashing for high alarm. The keypad, together with the user-friendly menu on the alphanumeric display, can guide the user through setup, calibration, and maintenance of the Sentry system.

An internal self-diagnostic feature makes over 120 routine checks of operating parameters to ensure the system is performing properly. During calibration, the controller performs a dynamic range check on all connected sensors to ensure its resolution is sufficient to give an accurate reading. In addition, reports can be printed via an optional forty-column printer. A variety of reports are available, including status, system, key event, history, calibration, and diagnostic reports.

The Sentry Classic Controller is approved and certified by a variety of third party agencies, including FM and CE. These approvals and certifications assure our customers that we carry only the highest quality of products and performance.

1. Menu Prompting

Guide and prompt users through system configuration and operation

2. System Security

Prevent unauthorized users from changing the configuration and identify those who have made changes via user identification codes

3. Diagnostics

Perform routine checks of operating parameters and alert users if a condition requires attention.

4. Sensor Scan Display

Continuously view current sensor gas exposure readings

5. Multiplex Digital Signals

Reduce installation costs by multiplexing sensors to the controller on a common cable

6. Record-Keeping

Easily keep reports for history, key events, or calibration actions

7. Relay Logic

Customize relay responses for personalization preferences

8. System Flexibility

Expand the controller user experience with accessories, product add-ons, and enhancement packages

Power (Standard)

120 VAC + 10-15%, 60 Hz

12 VDC Nom; 10 to 29 VDC

Power (Optional)

220 VAC + 10-15%, 50 Hz

12 VDC Nom; 10 to 29 VDC

Power Consumption

48-Watts nominal

Number of Channels

2, 4, or 8

Temperature

Operating: 32 o to 122oF (0o to 50oC)

Storage: -40 o to 131oF (-40o to 55oC)

Humidity

10% to 95% RH Non-Condensing

Relays

Standard: 3 DPDT 3A, 115 VAC

Ind. Relay Option: 16 SPDT 6A, 115 VAC

Custom Relay Option: 16 SPDT 6A, 115 VAC

Output Expansion: 16 SPDT 6A, 115 VAC

Analog Outputs

4-20 mA Current Source

Loop Resistance 800 ohms max.

Displays

4 digit ½” LCD

32 character (2 x 16) alphanumeric LCD

RS-232 Port

Standard Printer

Option MODBUS

Dimension

Rack Mounted: 7.0 x 4.5 x 12.0 in. (17.5 x 11.2 x 30.0 cm)

NEMA 4X Enclosure: 17.5 x 16.2 x 6.3 in. (44.5 x 41.1 x 16.0 cm)

NEMA 7 Enclosure: 22.0 x 21.5 x 14.0 in. (55.9 x 54.6 x 35.6 cm)

Weight

Rack Mounted: 7 lb. (3.2 Kg)

NEMA 4X Enclosure: 25 lb. (11.3 Kg)

NEMA 7 Enclosure: 143 lb. (65.0 Kg)

Approvals

FM Approved

CE Mark

Mounting

Rack Mounting: Shelf for insertion in Instrument Cabinet

Panel Mounted: Panel bracket, bezel

NEMA 4X Enclosure: Wall or vertical surface

NEMA 7 Enclosure: Explosion Proof, Class 1, Div I, Groups C & D

Sentry IT Fire and Gas Detection Solutions

A brief introduction to the sales, design and manufacturing facilities for Sierra Monitor Corporation's Sentry IT fire and gas solutions.

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A video demonstration on how to perform GlobalCal, the simple and time-saving calibration procedure, on all Sentry IT gas sensor modules.