Product Overview
The Allen-Bradley 1771-OB is an 8-point 10–27 VDC transistor (sinking) output module for the 1771 chassis. Each output is individually fused and provides solid-state switching for DC loads in PLC-5 systems.
Technical Specs
- Outputs: 8 transistor outputs
- Voltage range: 10–27 VDC
- Current: 1.5 A per output (max 8 A per module)
- Surge current: 4 A for 1 ms
- On-state voltage drop: ≤ 2 VDC
- Isolation: 1500 VAC (opto-electrical)
- Backplane current: 165 mA at 5 VDC
- Wiring arm: 1771-WA
Key Features
- Solid-state DC outputs with individual fusing
- Suitable for 12–24 VDC control circuits
- Removable wiring arm for easy module swap
- Proven module for legacy PLC-5 systems
FAQ
- Points? 8.
- Voltage? 10–27 VDC.
- Current per point? 1.5 A max.
Installation Guide
- Install the module in the 1771 chassis.
- Attach the 1771-WA field wiring arm.
- Wire DC loads and power supply observing polarity.
- Check individual fuses if required.
- Power up and test each output.
Selection Tips
- Use for standard 24 VDC discrete output applications.
- Observe total module current limit of 8 A.
- Pair with 1771-WA wiring arm for convenient maintenance.
Product Condition
Factory New: New, current-production products sourced directly from the manufacturer.
New in Sealed Package: Unused products supplied in their original, factory-sealed packaging.
New in Original Package: Unused products supplied in original manufacturer packaging that was not factory-sealed.
Warranty
Products are covered by a 12-month warranty unless otherwise specified in the quotation or product listing. If a product has a quality issue, it can be exchanged within 12 months or refunded in full in cash. Contact our sales team with your order details if you require warranty assistance.
Shipping Information
In-Stock Items: Same-day dispatch is available for most in-stock orders with cleared payment received before 2:00 PM (UTC+8).
Indent Items: Typical lead time is 1–3 weeks, depending on availability and product scarcity.
Customs & Documentation
International shipments are prepared with a commercial invoice, packing list and available supporting documents. Consignee details, declared value and shipping terms are confirmed before dispatch. Tracking information is provided after shipment.
Payment
Payment is accepted by bank wire transfer only, in USD, EUR, GBP or RMB/CNY. Credit cards and credit terms are not accepted. Cleared payment is required before dispatch unless otherwise agreed in writing.
30-Day Returns
We accept return requests within 30 days of delivery for international orders, subject to our return policy.
To qualify, products must be unused, in their original condition and packaging, with proof of purchase.
How to Request a Return
Contact our sales team with your order number, product details and reason for return. Please obtain return authorization and the correct return address before shipping any items back. Returns are made by mail. Return shipping is not free. It is charged at the actual international air-freight cost based on weight and volume.
Refunds are processed according to our published return and refund policy after the returned items have been reviewed.
Quality issues
Quality issues are covered by the 12-month warranty. Within 12 months, a quality issue can be exchanged or refunded in full in cash.
For full terms, please refer to our Refund Policy.
Frequently ask questions
Click Request a Quote on the product page and provide the part number, quantity, and destination country. Our sales team will reply with availability, pricing, and estimated delivery time.
We supply original industrial automation parts in different new-product conditions, including Factory New, New in Sealed Package, and New in Original Package. The condition of each item is specified in...
Yes. We source obsolete and hard-to-find PLC, DCS, and industrial control components. Send us the exact part number and required quantity so we can check availability.
Most in-stock orders with cleared payment received before 2:00 PM (UTC+8) qualify for same-day dispatch. Indent items typically require 1–3 weeks, depending on availability.
Yes. We ship industrial automation spare parts worldwide. Shipping costs and transit times depend on the destination, package weight, dimensions, and local import requirements.
We commonly ship through DHL, FedEx, UPS, and other international courier services. The carrier is selected based on the destination, shipment size, and delivery requirements.
We accept bank wire transfers in USD, EUR, GBP, and RMB/CNY. Full cleared payment is required before shipment unless otherwise agreed in the written quotation.
Products generally include a 12-month warranty unless otherwise stated in the quotation or product listing. Contact our team with your order details for warranty assistance.
Eligible products may be returned within 30 days of delivery, subject to our return policy. Contact our team for return authorization and instructions before sending any items back.
Yes. Tracking details are provided after dispatch. Commercial invoices, packing lists, and available supporting documents are prepared for international shipments.