1746SC-INO4VI SLC 500 Analog Output Module | Allen Bradley

Configured for high-precision signal regulation in SLC 500 control networks, the Allen Bradley 1746SC-INO4VI (1746SC-INO4VI Analog Output Module) provides direct physical/electrical execution of four isolated analog output channels. This module interfaces control logic with field-side actuators by converting digital values into standardized current (0-20 mA, 4-20 mA) or voltage (0-10 V, ±10 V) signals, utilizing 16-bit resolution to ensure output linearity across diverse process applications.

Hardware Specifications

PLC Deterministic Network Integration

The 1746SC-INO4VI is designed to communicate via the SLC 500 backplane bus. The module utilizes high-speed backplane bus communication velocity to minimize loop latency, ensuring deterministic data updates between the processor and the output circuitry. Firmware flash compatibility is managed through the host controller's configuration software, which governs the I/O mapping and scaling parameters. The integration of 16-bit resolution requires correct data block configuration in the ladder program to utilize the full dynamic range for current or voltage signal control.

Frequently Asked Questions (FAQ)

Q: Does this module require external power for the output channels?

A: The module draws its operating power from the SLC 500 backplane, requiring 120 mA at 5 V and 250 mA at 24 V. Ensure the system power supply is sized to accommodate this total backplane loading.

Q: Is channel-to-channel isolation maintained for all signal types?

A: Yes, the module provides 500 VAC continuous isolation between channels, which prevents ground loop interference when connecting to actuators with disparate reference potentials.

Field Installation Guidelines

• Wiring and Shielding: Use high-quality shielded twisted-pair cabling for all analog output connections. Terminate the shield at the module chassis ground or the designated terminal point to minimize electromagnetic interference (EMI) and common-mode noise.
• Thermal Management: Given the maximum thermal dissipation of 5 W, install the module in an enclosure that allows for natural convection cooling. Avoid placing high-heat producing modules (such as heavy I/O or power supplies) directly adjacent to this module to maintain the 60 deg C operational ceiling.
• Signal Segregation: Route analog output leads in dedicated conduits separate from high-voltage AC lines or inductive load switching circuits. Induced noise from contactors or VFD output leads can negatively affect the 0.08% current output accuracy.
• Grounding: Ensure the SLC 500 chassis is connected to a low-impedance earth ground. Verify that the field-side common terminal does not introduce a ground loop if the actuator is referenced to a different earth plane.