The Allen-Bradley 1771-OQ16 (1771OQ16 Digital Output Module) provides 16 isolated DC output points for switching external field circuits within a PLC-5 I/O system.

Model Identification

The supplied catalog information identifies 1771-OQ16 as an isolated B Series, 16-point digital output module. Listed spare variants are 1771-OQ16/A, 1771-OQ16/B, and 1771-OQ16/C. No additional electrical differences between these variants are specified.

Hardware Specifications

Isolated DC Output Characteristics

The 1771-OQ16 provides 16 isolated digital output points for DC field circuits. The supplied electrical data specifies an output range of 10-32 VDC with a maximum stated output current of 100 mA.

The isolated output configuration separates the specified output circuits from one another according to the module architecture. The supplied information does not define channel grouping, isolation voltage, leakage current, switching delay, or internal suppression components. These parameters should therefore be verified from the applicable technical documentation before detailed circuit design.

PLC-5 I/O Integration

The module functions as a discrete output device within the PLC-5 I/O architecture. Output commands are transferred through the controller and I/O backplane before being applied to the associated field circuits.

The 16-point configuration provides multiple discrete DC outputs in a single I/O module. The supplied data does not specify EtherNet/IP functionality, network timing, firmware requirements, or communication protocol parameters for the module itself.

Ordering Information

• 1 x Allen-Bradley 1771-OQ16 digital output module
• 1 x 16-point isolated DC output module
• No external terminal assembly, mounting accessory, or additional kit is identified in the supplied data

Field Installation Guidelines

Chassis Installation

• Install the module in a compatible PLC-5 I/O chassis.
• Inspect the backplane connector for contamination or physical damage before installation.
• Remove system power before inserting or removing the module unless the applicable documentation explicitly permits energized replacement.
• Verify full mechanical seating before applying power.
• Do not force the module into the chassis connector.

DC Field Wiring

• Confirm the field circuit voltage is within the specified 10-32 VDC range.
• Limit each output circuit to the specified 100 mA rating.
• Maintain suitable separation between DC output wiring and low-level analog or communication conductors.
• Verify field polarity and terminal identification before energizing the circuit.
• Provide external protection appropriate to the connected load where required.

Isolation and Grounding

• Preserve the intended isolated-channel wiring arrangement.
• Do not introduce unintended common connections between isolated output circuits.
• Maintain cabinet grounding and bonding according to the applicable electrical installation standard.
• Route switching conductors to reduce electromagnetic coupling into adjacent signal circuits.
• Inspect all field connections for secure mechanical termination.

Frequently Asked Questions

• How many output points are provided?

  The 1771-OQ16 provides 16 digital output points. The supplied product information identifies the module as an isolated B Series output module.

• What output voltage range is specified?

  The supplied specification identifies a DC output range of 10-32 VDC. The connected field circuit should remain within this stated range.

• What is the output current rating?

  The supplied product data specifies 100 mA output current. The connected load should not exceed the applicable module output rating.

• Is the output electrically isolated?

  Yes. The product information identifies the module as an isolated B Series digital output module. Detailed isolation voltage is not provided.

• What does the B Series designation mean?

  The supplied data identifies the module as "Isolated B Series." It does not provide a documented electrical interpretation of the B designation, so no additional function is assigned.

• Is module power consumption specified?

  No. The supplied information does not provide a power-consumption value. It should not be calculated from the 100 mA field-output rating.

• Does the supplied data confirm hot-swapping?

  No. Hot-swap capability is not stated. Installation and removal should therefore be performed with power removed unless the applicable PLC-5 documentation specifies otherwise.

• Are switching delay and leakage current specified?

  No. Switching delay, leakage current, contact behavior, and internal suppression characteristics are not included in the supplied data and should be verified separately.