Products Description
| Company Information | |||
| [email protected] | |||
| Mobile | +8613950166376 | ||
| +8613950166376 | |||
| 13950166376 |
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Allen-Bradley 1756-OB8I ControlLogix Isolated Digital DC Output Module |
| Module Type | Individually isolated digital DC output module |
| Series | ControlLogix 1756 I/O family |
| Number of Outputs | 8 individually isolated DC output channels |
| Output Voltage Range | 10 – 30 V DC (nominal 12/24 V DC) |
| Output Configuration | Sink/source with individual channel isolation |
| Output Current per Point | Up to ~2 A per channel @ 30 °C, derated to ~1 A @ 60 °C |
| Total Output Current | ~8 A max (derated with temperature) |
| Isolation Voltage | ~250 V continuous between outputs and backplane |
| Backplane Current (5.1 VDC) | ~200–250 mA |
| Backplane Current (24 VDC) | ~2–3 mA |
| Power Dissipation (Max) | ~3 W @ 60 °C |
| Minimum Load Current | ~1 mA per channel |
| Surge Current per Point | ~4 A for 10 ms, repeatable |
| Output Delay Time | OFF→ON ~1 ms max, ON→OFF ~2 ms max |
| Connection Type | Removable terminal block (e.g., 1756-TBCH / 1756-TBS6H) |
| Mounting | Installed in ControlLogix chassis slot |
| Operating Temperature Range | 0 °C to 60 °C |
| Storage Temperature Range | –40 °C to 85 °C |
| Relative Humidity (Non-condensing) | 5 % to 95 % |
| Dimensions (H × W × D) | ~300 mm × 38.1 mm × 111.25 mm |
| Weight | ~0.30 kg |
FAQ
FAQ
Q1: What is the function of the 1756-OB8I module?
It provides 8 individually isolated DC output channels for controlling field devices in ControlLogix systems.
Q2: What voltage range does this module support?
It operates within 10 – 30 V DC, suitable for standard 12 V and 24 V DC systems.
Q3: How much current can each output handle?
Each channel can supply up to about 2 A at 30 °C, with derating at higher temperatures.
Q4: Does each output have isolation?
Yes, each output channel is individually isolated, improving protection and reducing electrical interference.
Q5: What type of loads can it control?
It can drive relays, solenoids, contactors, and other DC loads.
Q6: Does it require an external power supply?
Yes, an external DC power supply (typically 24 V DC) is required for field outputs.
Q7: What are the switching response times?
Typical switching times are up to ~1 ms for ON and ~2 ms for OFF transitions.
Q8: What are the physical size and weight?
The module measures about 300 mm × 38.1 mm × 111.25 mm and weighs approximately 0.30 kg.
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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.
