Products Description
| Company Information | |||
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| Mobile | +8613950166376 | ||
| +8613950166376 | |||
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Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | Allen-Bradley 1797-OB4D |
| Manufacturer | Rockwell Automation (Allen-Bradley) |
| Series | FLEX Ex 1797 |
| Module Type | Digital Output Module |
| Output Channels | 4 points |
| Output Type | 24 VDC sourcing (non-isolated group outputs) |
| Output Current | ~0.5 A per channel (typical field load dependent) |
| Supply Voltage | 24 VDC (nominal) |
| Power Consumption | ~7.5 W |
| Power Dissipation | ~5 W |
| Output Response Time | ~2 ms update via backplane |
| Diagnostics | Short-circuit and open-wire detection per channel |
| Protection | Electronic protection + fault reporting to controller |
| Status Indication | LED per channel (ON/OFF/fault) |
| Safety Classification | Intrinsically safe (FLEX Ex system) |
| Compatibility | FLEX Ex I/O terminal bases (e.g., 1797-TB3 / TB3S) |
| Mounting Type | DIN rail (via terminal base) |
| Operating Temperature | 0 to 70 °C (typical Ex system range) |
| Storage Temperature | -40 to 85 °C |
| Humidity | 5–95% non-condensing |
| Physical Dimensions | ~94 × 75 × 46 mm |
| Net Weight | ~0.4–0.5 kg |
FAQ
FAQ
Q1. What is the main function of 1797-OB4D?
It is a hazardous-area digital output module used to switch field devices like solenoids, indicators, and relays in FLEX Ex systems.
Q2. How many outputs does it have?
It provides 4 digital output channels.
Q3. What type of output is it?
It is a 24 VDC sourcing output module (non-isolated group reference design).
Q4. Is it suitable for hazardous environments?
Yes, it is designed for intrinsically safe FLEX Ex applications such as oil & gas and chemical plants.
Q5. Does it have diagnostics?
Yes, it supports short-circuit detection and open-load diagnostics per channel, reported to the controller.
Q6. What is its update speed?
Output status is refreshed approximately every 2 ms via backplane communication.
Q7. What devices can it control?
It can drive low-power DC field devices such as solenoids, pilot lamps, and interface relays.
Q8. What is its main limitation compared to standard FLEX I/O?
It is designed for intrinsic safety applications, so it has lower power output and stricter wiring requirements than standard industrial modules.
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Packing & Delivery
We will use wear-resistant cartons to seal the boxes, and take photos for your confirmation before sealing. We will pack the boxes only after confirmation.
For express delivery, we will use DHL, UPS, TNT, FedEx and EMS.
Please rest assured that we have a deep cooperation with express delivery companies and can ensure that your goods are delivered to you in good condition.
