Product Overview
This output module provides reliable control signals for industrial drives and automation equipment. Factory floors depend on robust output interfaces for precise equipment actuation. The 45C66 delivers sixteen digital outputs with isolation and short-circuit protection. Its compact footprint occupies minimal space in Reliance Electric control cabinets. Maintenance technicians can replace this module quickly using standard hand tools. The unit’s optical isolation effectively separates field wiring from sensitive control logic.
Technical Specifications
| Parameter | Specification |
|---|---|
| Number of Outputs | 16 digital outputs (optically isolated) |
| Output Voltage | 24 VDC ±20% |
| Output Current per Channel | 1.0 A continuous (resistive) |
| Total Output Current | 8 A maximum (all channels) |
| Inrush Current Capability | 3 A for 50 ms |
| Switching Frequency | ≤50 Hz (resistive load) |
| Off-State Leakage | ≤0.5 mA |
| On-State Voltage Drop | ≤1.2 V at 1.0 A |
| Short-Circuit Protection | Electronic, per channel (auto-reset) |
| Overvoltage Protection | 33 V clamping (transient) |
| Isolation Voltage | 1500 VAC (outputs to logic) |
| Status Indication | Green LED per channel (on-state) |
| Fault Indication | Red LED per channel (overload/short) |
| Supply Voltage | 24 VDC ±15% (from backplane) |
| Power Consumption | ≤8.0 W |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | –40°C to +85°C |
| Dimensions (W x H x D) | 60 mm x 120 mm x 135 mm |
| Weight | 0.45 kg |
| Mounting Type | Chassis mount with four screws |
| Termination | Removable screw terminal blocks |
Output Drive and Protection Features
The 45C66 employs power MOSFET transistors for efficient output switching. Each channel independently drives loads up to 1.0 ampere continuously. Electronic short-circuit protection responds within 2 microseconds to fault conditions. The module automatically restarts affected outputs after removing the overload. Individual thermal shutdown prevents device destruction from extended fault conditions.
Diagnostic Monitoring and Status
Green LEDs illuminate for each active output, confirming proper command execution. Red fault LEDs signal short-circuit or over-temperature events immediately. A global power LED indicates the presence of supply voltage to the module. The unit transmits diagnostic status through discrete feedback contacts. Users can monitor module health via remote annunciator panels.
Isolation and Noise Immunity
Optical couplers provide 1500 VAC isolation between field outputs and control logic. This isolation protects sensitive processor circuits from transient surges. The module’s layout minimizes parasitic capacitance for high-noise environments. Separate power returns prevent ground loops from affecting output performance. Transient suppression devices clamp voltage spikes from inductive loads.
Energy Management and Thermal Performance
The module dissipates a maximum of 8 watts under full output load conditions. Internal PCB copper planes serve as heat spreaders for power components. Natural convection cooling suffices within the specified temperature range. The unit stores no significant energy internally, relying on the backplane supply. Low thermal resistance ensures stable operation in crowded control enclosures.
Mechanical Construction and Wiring
The 60-millimeter wide housing mounts securely with four screws to the chassis. Removable terminal blocks accept wire gauges from 0.5 mm² to 2.5 mm². Weighing 450 grams, the module requires no additional structural support. All field connections face forward for straightforward cable routing. Clear silk-screening identifies channel numbers and terminal functions.
Details
| Weight | 0.45 kg |
|---|---|
| Dimensions | 60 × 120 × 135 mm |
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