Product Introduction
The Allen-Bradley 1771-OBD/C Digital DC Output Module is a 16-point output module designed for industrial PLC applications requiring reliable DC switching. It converts control signals from the PLC into discrete DC output signals to drive field devices such as solenoids, relays, pilot lights, and actuators.
This module supports a broad voltage range from 10 V DC to 60 V DC and provides both resistive and pilot-duty output ratings. It is engineered for high-density rack-mounted installations and offers reliable operation in industrial environments. The 1771-OBD/C module includes protection features to ensure long-term reliability and consistent output performance.
Product Specifications
| Parameter |
Specification |
| Model |
1771-OBD/C |
| Product Type |
Digital DC Output Module |
| Number of Points |
16 |
| Output Voltage Range |
10–60 V DC |
| Maximum Output Current (Resistive) |
2 A per point |
| Maximum Module Current |
8 A total |
| Pilot Duty Output Current |
0.2 A per point |
| Output Type |
Sinking / sourcing configurable |
| Isolation |
Channel-to-backplane isolation |
| Protection |
Overcurrent and short-circuit protection per channel |
| Mounting |
Rack-mountable (1771 I/O rack) |
| Operating Temperature |
0°C to 60°C |
| Storage Temperature |
−40°C to 85°C |
| Dimensions |
165 x 51 x 89 mm |
| Weight |
0.84 kg |
Product Applications
-
Driving solenoids, contactor coils, and relays in automation systems
-
Activating pilot lights, alarms, and indicators
-
Controlling small actuators and motor starters in discrete processes
-
Industrial machinery requiring multiple DC outputs from a single module
-
Interface between PLC logic and field-level devices in process or manufacturing applications
-
Pilot-duty output applications where small loads need precise switching
-
Rack-mounted I/O systems in control cabinets for high-density installations
Product Advantages
-
High Channel Density: 16 output points per module minimize rack space usage.
-
Flexible Voltage Range: Supports a wide DC voltage range of 10–60 V for versatile applications.
-
Resistive and Pilot Duty Capability: Can drive both standard DC loads and low-current pilot devices.
-
Built-in Protection: Overcurrent and short-circuit protection ensures module and field device safety.
-
Reliable Operation: Designed for industrial environments with vibration, electrical noise, and continuous operation.
-
Rack-Mountable Design: Standard 1771 form factor allows easy integration into existing PLC systems.
-
Ease of Maintenance: Modular design allows replacement without disturbing other modules or wiring.
FAQ
-
What is the output voltage range of the module?
The module operates with DC output voltages from 10 V to 60 V.
-
How many output points are provided?
16 discrete DC output points per module.
-
What is the maximum resistive load per point?
Each output can drive up to 2 A resistive loads.
-
What is the total module current limit?
The module can handle a total current of 8 A across all channels.
-
Can the outputs drive pilot-duty devices?
Yes, each point supports 0.2 A pilot-duty loads.
-
Is each output channel isolated?
Yes, channels are electrically isolated from the backplane to protect the PLC and field devices.
-
Does the module include overcurrent or short-circuit protection?
Yes, protection is built into each channel to prevent damage during faults.
-
What types of devices can be driven by this module?
It can drive relays, solenoids, pilot lights, small actuators, and other 10–60 V DC field devices.
-
Is the module suitable for continuous industrial operation?
Yes, it is designed for long-term, reliable operation in industrial environments.
-
Can multiple outputs operate simultaneously?
Yes, the module supports simultaneous switching of multiple channels within rated current limits.
Recommended Related Models (Same Series or Function)
| Model |
Function |
Dimensions (mm) |
Weight (kg) |
| 1771-OBD |
DC Output Module, 16 Points |
127 × 25 × 114 |
0.82 |
| 1771-OB8 |
DC Output Module, 8 Points |
127 × 25 × 114 |
0.60 |
| 1771-OB4 |
DC Output Module, 4 Points |
127 × 25 × 114 |
0.45 |
| 1771-OFE |
Analog Output Module, 16 Points |
127 × 25 × 114 |
0.50 |
| 1771-OF8 |
Analog Output Module, 8 Points |
127 × 25 × 114 |
0.38 |
| 1771-IA |
Digital Input Module |
127 × 25 × 114 |
0.45 |
Popular Allen-Bradley Models (Same Brand)
| Model |
Function |
Dimensions (mm) |
Weight (kg) |
| 1771-IF4 |
Analog Input Module, 4 Points |
127 × 25 × 114 |
0.30 |
| 1771-IF8 |
Analog Input Module, 8 Points |
127 × 25 × 114 |
0.35 |
| 1771-OFE |
Analog Output Module, 16 Points |
127 × 25 × 114 |
0.50 |
| 1771-OF8 |
Analog Output Module, 8 Points |
127 × 25 × 114 |
0.38 |
| 1771-IA |
Digital Input Module |
127 × 25 × 114 |
0.45 |
| 1771-OB |
Digital Output Module |
127 × 25 × 114 |
0.48 |
Excellent PLC Co., Ltd. has a large number of brand new and original PLC and DCS spare parts, with more than 60 cooperative countries. All products are guaranteed for 1 year and delivered to you by high-quality express.
We are committed to using the best products and the most favorable prices to meet the needs and friendship of our customers. We have won the trust of thousands of customers, including these excellent customers.
As for the delivery time, when we receive your order requirements, we will arrange for warehouse personnel to test and verify the products. After you place the order, we will send it to you within 24 hours.
Excellent PLC
