Technical Specifications Overview
The table below details the core technical parameters of this analog output module.
| Parameter | Specification |
|---|---|
| Model Number | 45C305A |
| Product Type | Analog Output Module |
| Compatible System | Reliance Electric Automax Series |
| Number of Outputs | 4 channels (isolated) |
| Output Signal Types | 4-20 mA, 0-20 mA, or 0-10 VDC (configurable) |
| Resolution | 14-bit (0.006% of full scale) |
| Output Accuracy | ±0.05% of full scale (at 25°C) |
| Temperature Drift | ±25 ppm/°C (maximum) |
| Settling Time | 500 μs (typical, to 0.1%) |
| Maximum Load (Current) | 750 Ω (for 4-20 mA mode) |
| Minimum Load (Voltage) | 1 kΩ (for 0-10 VDC mode) |
| Channel Isolation | 1500 VAC (channel-to-channel) |
| Protection Features | Short-circuit and over-voltage protection |
| Internal Power Draw | 5 VDC, 250 mA |
| Dimensions (W x H x D) | 45 mm x 110 mm x 120 mm |
| Weight | 0.28 kg |
| Terminal Type | 20-point removable screw terminal block |
| Indicators | 4 bi-color LEDs (status per channel) |
| Operating Temperature | 0°C to +55°C |
High-Precision Analog Output Capabilities
The 45C305A analog output module delivers four high-resolution analog output channels for precise control of process actuators and drives. This analog output module provides field-configurable output types, allowing each channel to operate independently as 4-20 mA, 0-20 mA, or 0-10 VDC. The 14-bit resolution ensures exceptionally smooth and accurate control for demanding applications.
The module achieves an outstanding accuracy of ±0.05% of full scale at 25°C, making it suitable for precision process control loops. The temperature drift of only ±25 ppm/°C maintains this accuracy across a wide range of ambient conditions. A fast 500 μs settling time enables rapid response in dynamic control applications, such as high-speed positioning and flow regulation.
Advanced Drive and Protection Features
This analog output module drives current loops up to 750 Ω or voltage loads down to 1 kΩ, accommodating a broad range of field instruments. The 45C305A includes comprehensive protection features, including short-circuit protection and over-voltage protection on every channel. These safeguards prevent module damage from accidental wiring faults or field device failures.
The module provides 1500 VAC isolation between individual output channels, eliminating ground loop issues and improving signal integrity. This channel-to-channel isolation proves particularly valuable when connecting multiple instruments with different reference potentials.
Physical Design and Installation
This analog output module occupies a single slot in the Automax base rack and measures only 45 mm in width. The module weighs 0.28 kg, making handling straightforward during installation and replacement. A 20-point removable screw terminal block on the front panel accepts all field wiring connections, simplifying both initial installation and ongoing maintenance.
Four bi-color LEDs provide clear visual status indication: green indicates normal operation, while amber signals a fault condition. This immediate feedback helps maintenance personnel quickly identify channel-specific issues. The terminal block accepts wires up to 2.5 mm² (AWG 14), ensuring reliable connections.
Power and Environmental Specifications
The 45C305A draws 250 mA from the 5 VDC backplane and requires no external power supply for its operation. This analog output module operates reliably across a temperature range of 0°C to +55°C. It also withstands humidity from 10% to 90% (non-condensing) and resists vibration up to 2G at 10-100 Hz.
Details
| Weight | 0.28 kg |
|---|---|
| Dimensions | 45 × 110 × 120 mm |
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