OI-7420 ProSafe 4x2
The Otis Instruments, Inc. GenII ProSafe 4×22 Model OI-7420 is a two channel gas monitor that functions as a transmission controller. The OI-7420 monitors toxic, combustible and oxygen gas levels in ambient air by receiving and displaying 4-20mA signals from up to two wired sensor assemblies.
The OI-7420 features a 160×104 graphical LCD display and is equipped with four “dry contact” (Form C) 5 Amp alarm relays (with 4 Amp fuses) that are full-scale adjustable. The OI-7420 operates with either 12-35 Volts DC or 110/240 Volts AC power-in and includes a Modbus output with optional real-time monitoring software.
The ability to display data and activate alarms in relation to readings sent from on-site sensors make the OI-7420 a truly phenomenal product in the safety realm of the gas industry.
Operating Voltage: 12V to 35V DC or 120V AC
Tamb Temperature Range: -40°C to +70°C
Input Signal: 4-20mA
Output (Alarm Power):
• +12-35 Volts DC (fault indicator)
• RS-485
Current Draw: 250mA at 12 Volts DC
Channels: Two
Relays: Four Dry Contact (5 Amp) with 4 Amp fuses
Protection:
• Power EMI filter, surge suppression
• 4-20mA and RS-485 surge suppression
Display:
• Graphical LCD (160×104)
• Transflective
• Sunlight readable
• LED backlight
Enclosure:
• 8” x 8” x 4” Stahlin fiberglass with clear window
• Wall mount
• NEMA 4 certified Monitor Specifications
Warranty: One year (limited)
Power: AC, DC
Channels: 2
| OI-448 | 8x8x4 Fiberglass Enclosure with Clear Lid |
| OI-LCD-160 | LCD Screen with Green LED Backlight |
| OI-7420-FP-KIT | OI-7420 Faceplate Kit with Faceplate, Silkscreen, (2) Thumbscrews, Screen Foam |
| OI-7420-PCA-KIT | OI-7420 Control Board, includes LCD Screen |
| OI-488-BP | Backplane for 8x8x4 Fiberglass Enclosure |