Sentry IT 32 Channel Controller

Integral member of SMC's industry-leading fire and gas solution.

Sentry IT 32 Channel Controller

Sierra Monitor's Sentry IT 32 Channel Controller is a powerful network-enabled hazardous gas detection system controller that can operate up to 32 detectors and interface with devices over Modbus RTU, analog 4-20 mA, Sentry PSG Bus, and conventional dry contact. As part of the Sentry IT line, the Sentry IT Controller is compatible with the Classic Sentry, Sentry IT detectors, such as the 5100-XX-IT series, and other third party sensors and devices.

With its modular internal design, users can select just those I/O components that are needed for their application without adding multiple external boxes. The Sentry IT controller's large, touch sensitive, and easy-to-read color panel, along with a simple menu-driven configuration approach makes it easy to configure and operate the system. In addition, the controller easily integrates with plant-wide distributed control systems, PLC's, personal computers, tablets, and smartphones to provide the necessary data and alarms. The embedded Web application enables management and technicians to view important data remotely and provides connectivity into the Industrial Internet of Things (IIoT).

Gas detection system controller
1. GlobalCalTM

Non-intrusively calibrate all connected sensors at the same time

2. SenseSafe TM

Consistently monitor connected Sentry IT gas detection sensor performance for safety and maximum lifetime

3. Touch-Panel Computer

Easily operate and configure intelligent data

4. Backup Battery

Provide the desired stand-by power in the event of a power outage

5. Network compatible with Modbus RTU, 4-20mA, and other sensor communications

Easily install in a variety of field applications and easily obtain critical safety information wherever neededmaximum lifetime

6. Protocol Compatibility

Seamlessly interface with external control systems using multiple supervisory protocols such as BACnet, Modbus TCP, LonWorks, and more

7. USB Flash Drive

Quickly configure and upgrade new software

8. Sentry Compatibility

Interconnect with all Sentry IT products, legacy Sentry products, and third party sensors and devices

9. Connectivity

Connect with up to 32 module addresses

Model Number 5000-32-IT

AC Version: 120/240 VAC +/- 10%, 50/60 Hz

DC Version: 24VDC Nominal (18-30 VDC)

Power Consumption: Controller 50W, Typical Max System 200W

Battery Backup Capability: External option


Operating Temperature: -14 to 131 oF (-10 to 55oC) *

Check with factory for applications outside of 32 to 122oF (0 to 50 oC)

Storage Temperature: -4 to 140 oF (-20 to 60oC)

Relative Humidity: 0-95% Non-condensing


Type: 5.7” color, backlit touch-screen

Environmental rating: NEMA 4

Views: Bar charts, text data screens, configuration screens

Other indicators: Integral long-life, high-intensity LED lights for Safe, Warning, Alarm, and Trouble

Connectivity to external controls and systems

Controller to Ethernet: Modbus TCP/IP or EtherNet/IP (other protocols available)

Optional – Remote management: Web browser interface

Optional – Mass storage: Flash drive via USB port

Connectivity to modules

Channels: Up to 32 module addresses

Channel power: 24VDC


  • Analog 4-20 mA: 2, 3, or 4-wire per ISA specifications
  • Modbus RTU (Sentry IT): RS-485 (half-duplex)
  • SentryBus: Proprietary Power, Signal, Ground (PSG)
  • Binary Input: Supervised or Digital Input

4-20 mA: Variable retransmission 3-wire or 4-wire

Relay: User Configurable, SPDT (multiples of 8)

Standard: 5 Amps

Optional: 8 Amps

Trouble: 5 Amps, Fail-safe


Design: Wall-mount

Material: Painted mild steel, 316SS, or GRP

Dimensions (HxWxD):

  • NEMA 1: 18 x 14 x 6 inches (45.7 x 35.6 x 15.2 cm)
  • NEMA 4 SS: 20.5 x 14.4 x 8.2 inches (52.1 x 36.6 x 20.6 cm)


  • NEMA 1: 30.0 lbs, (13.6 kg) Typical
  • NEMA 4 SS: 35.0 lbs (15.9 kg) Typical

Rating: NEMA 1 Standard (NEMA 4 or optional NEMA 4X)

 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.

How to Easily Calibrate Sentry IT Gas Sensors with GlobalCal

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