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Allen-Bradley

Allen-Bradley 1771-OFE1 PLC-5 Analog Output Module

SKU Allen Bradley 1771-OFE1

In stock

12-month warranty
Free returns within 30 days

Manufacturer: Allen-Bradley
Product No.: Allen Bradley 1771-OFE1
Origin United States
Product Type: Analog Output Module
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 0.57 kg
Dimensions: 2.9cm x 19.3cm x 25.4cm
Shipping port: Xiamen
Warranty: 12 months

Product Description

Description

The Allen-Bradley 1771-OFE1 is a 4-channel analog output module that converts digital values from a processor into analog voltage signals to control field devices within a industrial control network. This single-slot module interfaces directly into a Bulletin 1771 I/O chassis and operates with PLC-5 controllers via block transfer programming. The module converts 12-bit binary or 4-digit binary-coded decimal (BCD) values into high-resolution voltage outputs to regulate modulating infrastructure such as control valves, adjustable frequency AC drives, dampers, louvers, and positioners. It also acts as a precise signal source for data loggers, splitters, panel meters, totalizers, and single-loop controllers. Featuring 1500V optoelectrical isolation and 1000V individually-isolated differential outputs, the device secures processing equipment against localized overvoltage situations and contains dedicated internal short-circuit overload protection on each loop.

Features

Seamless operational configuration utilizing block transfer programming with Write Block Transfer instructions moving up to 13 data words and Read Block Transfer instructions carrying 5 debugging words.
Four independent, 1000V individually-isolated differential voltage loops avoiding ground loops across widely separated field components.
Dual data format functionality supporting both Binary Coded Decimal (BCD) scaling and natural binary encoding to fit specific system setups.
Self-testing logic sequences executed automatically during startup to provide early operational diagnosis and system verification.
Built-in overload protection circuits embedded on each separate channel path to safeguard hardware against load short circuits.
Shipped with a dedicated 1771-WH wiring arm allowing rapid module replacement without disconnecting active field wiring links.

Applications

Proportional modulation of industrial control valves and dampening louvers.
Speed command reference transmission for adjustable frequency AC variable speed motor controllers.
Signal sourcing for centralized data logging networks, splitters, and digital panel meters.
Distributed control coupling with standalone single-loop controllers and processing totalizers.

Revisions

Product Number	Specification Description
1771-OFE1 Ser A	1771-OFE1/A, Series A, Rev A
1771-OFE1 Ser B	1771-OFE1/B, Series B, Rev B

Technical Specifications

Performance and Electrical Specifications

Parameter	Specification
Manufacturer	Allen-Bradley
Product Line / Series	PLC-5 / PLC Series
Part Number	1771-OFE1
UPC	612598003051
Module Type	Analog Output Module
Number of Channels	Four (4) isolated channels
Output Type	4 Isolated (1000 Volt) Differential
Output Voltage Ranges	+1 to +5 VDC; -10 to +10 VDC; 0 to +10 VDC
Module Resolution	12 bits
DAC Converter Settling Time	0.8 ms (maximum for a resistive load)
Internal Scan Rate (BCD with Scaling)	8.0 ms for every channel
Internal Scan Rate (Binary without Scaling)	1.6 ms for all channels
Module Accuracy (BCD Mode)	+0.1% of full scale; +1/2 Least Significant Digit (LSD)
Module Accuracy (Binary Mode)	+0.1% of full scale; +1/2 Least Significant Bit (LSB)
Optoelectrical Isolation	1500V
Backplane Power Consumption	1.50 Amperes at 5V
Required External Power	None
Maximum Power Dissipation	7.9 Watts
Maximum Thermal Dissipation	26.9 BTU/hr
Typical AC Signal Delay (Off)	45 (+/- 15) ms
Typical DC Signal Delay (Off)	50 ms
Compatible Chassis	1771 I/O
Wiring Arm	1771-WH

Mechanical and Environmental Specifications

Parameter	Specification
Mounting	Rack Mountable (Single Slot)
Weight	1.25 lbs (0.57 kg)
Operating Temperature	32 to 140 Celsius
Storage Temperature	-40 to 185 Celsius
Operating Shock	30 g
Operating Vibration	2g at 10-500 Hz

Installation Guidelines

Disconnect all chassis backplane power before inserting or removing the module from its structural slot.
Snap appropriate keying bands between positions 10-12 and 26-28 to dedicate the specific slot position for this module type.
Slide the card firmly into the chassis card guides until it seats fully into the backplane connectors.
Secure all external loop wires to the 1771-WH wiring arm, ensuring correct polarity for each isolated channel.
Sum the backplane current draw (1.50 A) with all other modules to confirm the chassis power supply capacity is not exceeded.

Shipping & Returns

Global Express Shipping

Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our technical warranty.

FAQ

Does this analog module require an external power supply to execute conversions?

No external power supply is required. The device draws its full operating current of 1.50 Amperes directly from the 1771 I/O chassis backplane.

What happens to the status indicators if an internal module fault is detected at startup?

The module executes an automated self-check at startup. If an internal fault occurs, the red fault indicator LED turns on and the green power status indicator LED remains OFF.

How does data transfer format affect the internal scan rate of the device?

When configured for Binary Coded Decimal (BCD) data with scaling, the scan rate is 8.0 ms for all channels. When configured for natural binary data without scaling, the update rate accelerates to 1.6 ms.

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