Configured for low-true DC output control in Allen-Bradley 1771 Universal I/O Chassis networks, the Allen-Bradley 1771-OVN (1771-OVN Digital Output Module) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
1771: Chassis-based Universal I/O module family for Allen-Bradley PLC architectures.
OV: High-density low-true (sinking) DC digital output hardware configuration.
N: Operating range designation for 10 to 30 VDC field power compatibility.
Hardware Specifications
Parameter
Specification
Model
1771-OVN
Brand
Allen-Bradley
Origin
USA
Weight
1.08 lbs
Dimensions
Standard 1771 single-slot chassis module
Operating Temp
0 to 60 deg C
Power Consumption
Standard 1771 backplane bus current draw
Operating Voltage
10 to 30 VDC
Output Channels
32 channels
Output Circuit Type
Low-True (Current Sinking) Digital Output
High-Density I/O Isolation and Backplane Determinism
The 1771-OVN module maximizes panel layout efficiency through high I/O density scaling, housing 32 low-true output channels in a single chassis slot. Designed to operate in deterministic EtherNet/IP and ControlNet remote I/O architectures, the module isolates field switching transients from backplane logic, preventing cross-talk and preserving backplane bus communication velocity during concurrent multi-channel switching events.
Frequently Asked Questions
Q: What output logic convention and voltage rating does the 1771-OVN module use?
A: The 1771-OVN utilizes low-true (sinking) output logic, switching connected DC loads within a 10 to 30 VDC operating range.
Q: Is hot-swapping allowed for the 1771-OVN module during active rack operation?
A: No, backplane supply power and field circuit voltage must be de-energized prior to inserting or removing the 1771-OVN to prevent electrical transients and backplane communication faults.
Field Installation Guidelines
Disconnect all 10 to 30 VDC field wiring power sources and main chassis backplane power prior to hardware installation or servicing.
Slide the module into the designated chassis slot using the card guides until the top and bottom retention latches securely engage.
Wire field power and loads to the corresponding 1771 field wiring arm terminals, verifying correct polarity for low-true current sinking configurations.
Route field output conductors separately from high-voltage AC lines and VFD cables to minimize electromagnetic interference.
