Allen-Bradley 1756-OB8EI ControlLogix Digital DC Sourcing Output Module
$123.00
$320.00
Description
Allen-Bradley 1756-OB8EI ControlLogix Digital DC Sourcing Output Module
Configured for individually isolated DC output switching in ControlLogix platforms, the Allen-Bradley 1756-OB8EI (1756-OB8EI Digital DC Sourcing Output Module) provides direct physical/electrical execution. The module contains eight electronically fused sourcing output channels with 10-30 VDC operation, individual channel isolation, and ControlLogix backplane communication.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-OB8EI |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.50 lbs |
| Power Consumption | 4.7 W maximum at 60 deg C |
| Module Type | Digital DC Sourcing Output Module |
| Product Line | ControlLogix |
| Number of Outputs | 8 points |
| Output Type | DC Sourcing |
| Output Configuration | Individually isolated, electronically fused channels |
| Output Voltage | 24 VDC nominal |
| Operating Voltage Range | 10-30 VDC |
| Maximum Output Current per Point | 2 A at 60 deg C |
| Maximum Output Current per Module | 10 A at 60 deg C; 16 A at 55 deg C |
| Backplane Current at 5.1 VDC | 250 mA |
| Backplane Current at 24 VDC | 2 mA |
| Output Signal Delay OFF to ON | 1 ms maximum |
| Output Signal Delay ON to OFF | 5 ms maximum |
| Isolation Voltage | 50 V continuous |
| Removable Terminal Blocks | 1756-TBCH, 1756-TBS6H |
| Enclosure Type | Open-style |
ControlLogix Backplane Communication and I/O Scaling
The 1756-OB8EI operates within the ControlLogix architecture using backplane bus communication for controller-to-I/O data transfer. The individually isolated output structure supports distributed field device control while maintaining separation between output channels.
The module supports I/O density scaling across ControlLogix chassis configurations and provides firmware flash compatibility within the ControlLogix module management environment. Electronic channel fusing provides output circuit protection monitoring, while the sourcing output design supports connection to DC field loads requiring controlled voltage delivery.
Frequently Asked Questions
Q: What output protection function is integrated into the 1756-OB8EI?
A: Each output channel includes electronic fusing for individual channel protection.
Q: How many isolated output channels are available on this module?
A: The module provides eight individually isolated DC sourcing output channels.
Q: What are the backplane power requirements of the 1756-OB8EI?
A: The module requires 250 mA at 5.1 VDC backplane power and 2 mA at 24 VDC backplane power.
Field Installation Guidelines
Install the 1756-OB8EI module into a compatible ControlLogix chassis and verify proper mechanical connection with the backplane interface. Confirm that field devices connected to each output channel operate within the specified 10-30 VDC voltage range and output current limits.
Use the specified removable terminal blocks for field wiring termination. Route DC output conductors separately from high-voltage power cables and high-noise switching circuits. Apply grounding and shielding methods according to the site electrical installation standard. Verify channel wiring polarity, terminal seating, and module configuration before applying field power.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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