Otis Instruments OI-7440-X-4 Wired Monitor

Availability: In stock
Product Type4 Channel Wired Gas Monitor
Power TypeWired Powered
Operating Voltage12V to 35V DC or 120V AC
Current Draw275 mA Maximum
Power Supply3.13A (75W), 85/264V AC to 24V DC (Optional)
OutputRS-485 Modbus
ProtectionPower EMI Filter
4-20 mA Surge Suppression
RS-485 and RS-232 Surge Suppression
Display Screen160x104 Resolution Graphical LCD Screen
Transflective (Sunlight Readable) with LED Backlight
Interface5 Push-Buttons (MENU, ADD, SUB, SCAN/HOLD, RESET/ESC)
Tamb Temperature Range-40°C to +70°C
Customizable SettingsOption to Disable Alarm Relays/Channel Individual Alarm Set Points
Latching and Non-Latching Relay Settings
Wired (Analog) InputUp to 4 Wired 4-20 mA (Analog) Inputs
Relays4 Dry-Contact Relays with 4 Amp Replaceable Fuses
Fault Terminal
Wired (Analog) OutputRS-485 Modbus
Enclosure MaterialNEMA 4X Fiberglass Enclosure with Clear Window
Product Dimensions10 in. L x 8 in. W x 6 in. H (Max. Dimensions with Attachments)
Total Weight8.5 lbs.
Product Mounting4 Mounting Feet, 6 in. W x 12-1/4 in. T (included)
Maximum Mounting Bolt/Screw Size of 5/16 in. (8mm) Diameter
Product CompatibilityAny Otis Wired Sensor (01-617, 0I-675, 01-6000, 01-6000K)
3rd Party 4-20 mA Wired (Analog) Sensors
Hardware Warranty1-Year, Limited
Part Number Formula01-7440-[Power]-4

The Otis Instruments OI-7440 ProSafe 4x4 Controller is a wired monitor that supports up to four individual 4-20 mA wired sensor assemblies. Four relays can be individually set up to the full scale of the channel and may be set to either latching or non-latching. Compatible with any wired device with a 4-20 mA output, allowing more than just gas detection to be displayed and monitored, which will lead to a safer working environment.


  • 4 Channel Wired Monitor - Supports Any 4-20 mA Wired Sensor
  • 12 to 35 VDC Operating Voltage with an Optional AC Power Supply
  • Operating Temperature Range of -40°C to +70°C
  • Graphical LCD with LED Backlight
  • 5 Push-Button Interface (ADD, MENU, SUB, SCAN/HOLD and RESET/ESC)
  • 4 Individually Configurable Alarm Set-Points: Four Front Panel ALARM LED Indicators (Red); 4 Dry-Contact Relays (4 Amps Maximum per Relay)
  • Status LEDs for Power and Fault: Multi-Color Status Light; Amber Fault LED for Indicating System Faults
  • Outout Options: Wet Contact DC Fault Terminal, Relay 4 Can Optionally Be Configured as a Fault Relay, RS-485 Modbus
  • NEMA 4X Standard Fiberglass Enclosure with Clear Window
  • 1-Year Limited Hardware Warranty

​Please refer to datasheet for more information