The 1746SC-INO4I is a specialized analog output module engineered by Spectrum Controls for integration within the Allen-Bradley SLC 500 automation platform. This module features four channels, each providing individual channel-to-channel isolation, which is critical for maintaining signal integrity in environments prone to electrical noise or ground loops. Designed specifically for current-loop control, this module is an ideal solution for precision applications requiring robust protection against cross-channel interference.
Features
Four individually isolated current-only output channels.
16-bit resolution for high-precision control of actuators, VFDs, and proportional valves.
500V AC continuous isolation between channels and the backplane to prevent ground loop interference.
Supports multiple current ranges including 0-20 mA, 4-20 mA, and 0-21 mA.
Fast 1 ms step response time for rapid process adjustments.
Support for external 24V DC power to minimize load on the SLC 500 backplane.
Technical Specifications
Model
1746SC-INO4I
Manufacturer
Spectrum Controls (Encompass Partner)
Module Type
Individually Isolated Analog Output
Number of Outputs
4
Output Current Ranges
0-20 mA, 4-20 mA, 0-21 mA
Resolution
16-bit
Step Response
1 ms (to 95% full scale)
Backplane Current
120 mA @ 5V DC / 250 mA @ 24V DC
Isolation
500V AC continuous (Channel-to-Channel/Backplane)
Operating Temperature
0 to 60 degC (32 to 140 degF)
Max Thermal Dissipation
5.0 Watts
Installation Guidelines
Ensure power is removed from the SLC 500 chassis before inserting or removing the module to prevent electrical damage.
Use shielded twisted-pair cabling for all analog output connections to minimize EMI pickup.
Ground the cable shields at the source or controller end according to standard industrial practice to prevent ground loops.
Ensure proper ventilation within the cabinet to maintain ambient temperatures below 60 degC.
Verify that the backplane power supply can accommodate the module's power requirements or utilize the external 24V DC supply option if necessary.
FAQ
Is this module compatible with standard SLC 500 racks? Yes, the 1746SC-INO4I is designed to fit directly into standard Allen-Bradley SLC 500 I/O chassis.
What does the 'I' in the model number signify? The 'I' indicates that the module features individual channel-to-channel isolation, allowing each output to operate independently without electrical interference from other channels.
Can I use this module for voltage outputs? No, this specific model is designed exclusively for current-only (sourcing) applications.
