OI-7440 ProSafe 4x2
The Otis Instruments, Inc. Gen II ProSafe 4×42 Model OI-7440 is a four channel gas monitor that functions as a transmission controller. The OI-7440 monitors toxic, combustible and oxygen gas levels in ambient air by receiving and displaying 4-20mA signals from up to four wired sensor assemblies.
The OI-7440 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-7440 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.
Part Number Formula: OI-7440-[Power Supply]-4
Operating Voltage: 12V to 35V DC or 120V AC
Tamb Temperature Range: -40 C to +70 C
Channels: 4
Input signal:
• 4-20mA
• RS-485
Output (Alarm Pwr):
• 12-35 Volts DC (Fault Indicator)
• RS-485 Modbus
Current Draw: 250mA at 12 Volts DC
Protection:
• Power EMI filter & surge protection
• 4-20mA & RS-surge protection
Display:
• 160×104 graphical LCD
• Transflective, sunlight-readable
• LED backlight
Relays: Four dry-contact (5 Amp) with 4 Amp fuses
Gases: All that are supported by Otis sensor assemblies
Enclosure: Stahlin 10x8x6 fiberglass with clear window
Enclosure Mounting: Wall mount
Certifications: NEMA 4 (enclosure only)
Warranty: Hardware: One year (limited)
Power: AC, DC
Channels: 4
| OI-451 | 10x8x6 Stahlin Fiberglass Enclosure with Base, Lid with Window and Lock Latches |
| OI-LCD-160 | LCD Screen with Green LED Backlight |
| OI-7440-FP-KIT | OI-7440 Faceplate Kit with Faceplate, Silkscreen, (2) Thumbscrews, Screen Foam |
| OI-7440-PCA-KIT | OI-7440 Control Board, includes LCD Screen |
| OI-7010-BP | Backplane for 10x8x6 Fiberglass Enclosure |