1794-OF4I Allen-Bradley - Analog Output Module

1794-OF4I Allen-Bradley Flex IO Isolated Analog Output Module

• Four isolated outputs give you flexibility for mixed analog signals. Each channel operates independently with 120V continuous isolation (250V with 1794-TBN base).
• Output current ranges include 4‑20 mA and 0‑20 mA. Voltage ranges cover ±10V, 0‑10V, ±5V, and 0‑5V – all user‑configurable.
• Resolution reaches 15 bits plus sign. Voltage resolution equals 0.320 mV/cnt, while current resolution is 0.656 mA/cnt.
• Update rate selects 2.5 ms or 5.0 ms for all channels. Step response to 63% of full scale sits below 25 µs.
• Absolute accuracy stays at 0.1% full scale @ 25°C for both voltage and current terminals. Accuracy drift equals 0.0012% FS/°C (voltage) and 0.0025% FS/°C (current).
• External DC supply requires 24V nom (19.2…31.2V DC inclusive of 5% AC ripple). FlexBus draws 50 mA at 5V DC.
• Thermal dissipation reaches max 16 BTU/hr @ 31.2V DC. Power dissipation equals 4.7 W at 31.2V DC.
• Operating temperature ranges from 0°C to 55°C (32°F to 131°F). Storage survives –40°C to 85°C (–40°F to 185°F).
• Vibration tolerance is 5g @ 10 to 500 Hz. Operating shock withstands 30 g for rugged environments.
• Current load on voltage output maxes at 3 mA. Resistive load on voltage output spans 0 to 750 Ω.
• Maximum overload protection permits 30V continuous or 32 mA continuous (one channel at a time).
• Factory calibration comes standard. You also have the option for manual recalibration if needed.

Environmental & Electrical Endurance

• Isolation voltage depends on the terminal base. It provides 250V continuous with 1794-TBN and 120V continuous with other compatible bases.
• High vibration rating (5g @ 10‑500 Hz) and 30g shock tolerance ensure reliable performance on moving machinery.
• Thermal dissipation stays within 16 BTU/hr maximum. This low heat output simplifies cabinet cooling requirements.
• The module resists common industrial interference. Its digital‑to‑analog converter type maintains stable output under noisy conditions.
• Wide storage temperature range (–40…85 °C) protects the device during logistics or plant shutdowns.

Frequently Asked Questions (FAQ)

• Q: Is the 1794-OF4I a genuine Allen‑Bradley new module?
  A: Yes, we supply 100% brand new and original Allen‑Bradley 1794-OF4I modules. No counterfeits or used units.
• Q: What terminal base works best with the 1794-OF4I?
  A: Compatible bases include 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS, and 1794-TBN. Choose based on your wiring needs (screw or spring clamp).
• Q: Can I mix current and voltage outputs on the same module?
  A: Yes, each of the four isolated channels is individually configurable. You can set some channels for 4‑20 mA and others for ±10V.
• Q: What is the update rate and step response?
  A: Update rate is either 2.5 ms or 5.0 ms across all channels. Step response to 63% of full scale is less than 25 µs.
• Q: Do you have stock available? How long until delivery?
  A: Yes, we maintain stock on hand. Shipment occurs within 5 days after order. Delivery time depends on your location and chosen courier (FedEx, UPS, DHL).
• Q: What is the return policy?
  A: We offer 30 days return from delivery date. Items must be unused and in original packaging. Contact us for RMA authorization.
• Q: Does the module require external 24V DC?
  A: Yes, a nominal 24V DC supply (range 19.2‑31.2V DC) is mandatory. The module draws 210 mA from this external source.
• Q: Can I calibrate the 1794-OF4I manually?
  A: The module ships factory calibrated. However, you have the option to perform manual calibration if your application demands higher precision.

Contact Information Inquiries: sales@nex-auto.com | +86 153 9242 9628 (WhatsApp)

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