1771-OBD/C Allen-Bradley Digital Output Module

1771-OBD/C Allen-Bradley Digital Output Module | New & Original Stock

Availability: 20 left in stock

Allen-Bradley 1771-OBD/C 1771 PLC-5 I/O System Digital Output Module The Allen-Bradley 1771-OBD/C, also cataloged as the 1771-OBD Digital Output Module,...

SKU: 1771-OBD/C

Manufacturer: Allen Bradley
Product No.: 1771-OBD/C
Product Type: Digital I/O Cards
Product Origin: USA
Payment:T/T, Western Union
Weight: 840g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1771-OBD/C 1771 PLC-5 I/O System Digital Output Module

The Allen-Bradley 1771-OBD/C, also cataloged as the 1771-OBD Digital Output Module, operates as a dedicated hardware component for controlling external devices within 1771 PLC-5 I/O System platforms.

Hardware Specifications

Parameter	Specification
Model	1771-OBD/C
Brand	Allen-Bradley
Origin	United States
Module Type	Digital Output Module
Output Channels	16 isolated DC outputs
Output Voltage Range	10-60 VDC
Output Current per Channel	2 A maximum (resistive load)
Pilot Duty Output	0.2 A per output
Current per Module	8 A maximum
Backplane Current	400 mA at 5 VDC
Isolation Voltage	1500 VAC for 1 minute
Power Dissipation	7 W
Operating Temp	0 to 60 deg C
Storage Temp	-40 to 85 deg C
Humidity	5 to 95% non-condensing
Dimensions	178 x 50 x 180 mm
Weight	0.84 kg (1.85 lbs)

Profinet / EtherNet/IP Deterministic Networks and I/O Density Scaling

The 1771-OBD/C handles 16 independent solid-state DC load drivers to maximize local I/O density scaling inside standard 1771 universal racks. To maintain synchronous operational sequencing over Profinet or EtherNet/IP deterministic networks via an adapter module, the 1771-OBD/C restricts its internal backplane bus logic consumption to 400 mA at 5 VDC. This strict boundary optimizes the chassis power margin, allowing proper firmware flash compatibility across legacy systems and preventing bus execution dropouts during dense channel switching events.

Frequently Asked Questions

Q: What is the total combined electrical current limit for the 1771-OBD/C module?

A: The cumulative electrical current across all 16 channels must not exceed 8 A total for the module, even though individual discrete channels can handle up to a 2 A maximum resistive load.

Q: Does the 1771-OBD/C possess internal short-circuit protection for its channels?

A: No. The internal electronic circuitry lacks embedded individual fuses. External fuse protection per output channel is necessary to guard the internal switching components against overcurrent states.

Q: Is online hot-swapping supported for this module inside an energized 1771 chassis?

A: No. The physical architecture of the 1771 rack requires isolation and complete power de-energization prior to module removal or insertion to protect against backplane logic faults and component stress.

Field Installation Guidelines

Chassis Alignment: Align the module side tracks with the upper and lower plastic guides of the 1771 chassis slot. Slide the module backward until it sits completely into the backplane bus socket.
External Circuit Protection: Wire external inline fast-acting fuses for each channel to safeguard the module from field-side short-circuits.
Inductive Load Suppression: Install a flyback diode in parallel across DC inductive loads, such as solenoid coils and DC relays, to absorb transient voltage spikes during module turn-off cycles.
Conductor Separation: Maintain physical isolation between the low-voltage DC output signal wires and any adjacent high-voltage AC electrical distribution or motor control cables.

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Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

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Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

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