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Honeywell 621-1500 Digital Input Module
The Honeywell 621-1500 Digital Input Module is a robust industrial I/O device designed for high-performance digital signal acquisition. It is commonly used in distributed control systems (DCS) and safety-critical applications, offering high reliability and fast response.
Product Features
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16-channel digital input module
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Compatible with Honeywell TDC 3000 and other control systems
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Opto-isolated inputs ensure signal integrity
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Diagnostic capabilities for input channel status
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Designed for harsh industrial environments
Technical Specifications
| Parameter | Description |
|---|---|
| Module Type | Digital Input |
| Number of Channels | 16 |
| Input Type | Discrete (Dry Contact or 24VDC) |
| Isolation | Opto-isolated |
| Input Voltage Range | 18–30 VDC |
| Input Current | Typically 6 mA |
| Response Time | < 5 ms |
| Power Supply | 24 VDC nominal |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Dimensions (W x H x D) | 145 x 100 x 40 mm |
| Weight | 0.53 kg |
Applications
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Process automation systems
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Power plants and utilities
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Oil & gas control panels
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Safety instrumented systems (SIS)
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Manufacturing and machine automation
Advantages
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High-density input channels in compact form
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Industrial-grade durability and EMI immunity
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Reduced wiring and easy integration
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Fast signal processing for time-sensitive operations
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Backed by Honeywell’s global support and reliability
Frequently Asked Questions (FAQ)
Q1: How many digital inputs does the 621-1500 module support?
A1: The module supports 16 discrete digital input channels.
Q2: What type of input signals are compatible?
A2: It accepts dry contact or 24VDC input signals.
Q3: Is the module compatible with TDC 3000 systems?
A3: Yes, it is fully compatible with Honeywell’s TDC 3000 control systems.
Q4: Does the module provide input isolation?
A4: Yes, the inputs are opto-isolated for signal protection.
Q5: Can this module be used in safety-critical applications?
A5: Yes, it is suitable for use in safety instrumented systems.
Q6: What is the typical response time of the module?
A6: The input response time is typically less than 5 milliseconds.
Q7: What are the dimensions and weight of the module?
A7: The size is 145 x 100 x 40 mm and the weight is 0.53 kg.
Q8: What is the operating temperature range?
A8: The operating temperature range is 0°C to 60°C.
Q9: Does it support diagnostics?
A9: Yes, it has built-in diagnostic capabilities for channel status monitoring.
Q10: Can this module be hot-swapped?
A10: No, power should be disconnected before replacement.
Related or Same Series Models
| Model | Type | Channels | Dimensions (mm) | Weight |
|---|---|---|---|---|
| 621-1100 | Digital Output | 16 | 145 x 100 x 40 | 0.52 kg |
| 621-2200 | Analog Input | 8 | 145 x 100 x 40 | 0.54 kg |
| 621-2100 | Analog Output | 8 | 145 x 100 x 40 | 0.54 kg |
| 621-0020 | Power Supply | N/A | 145 x 100 x 40 | 0.65 kg |
| 621-3550 | Relay Output | 8 | 145 x 100 x 40 | 0.58 kg |
| 621-0830 | RTD Input Module | 6 | 145 x 100 x 40 | 0.57 kg |
Popular Honeywell Models
| Model | Type | Channels | Dimensions (mm) | Weight |
|---|---|---|---|---|
| 8C-PAON01 | Analog Output Module | 8 | 135 x 130 x 40 | 0.45 kg |
| 8C-PAIHA1 | Analog Input w/ HART | 16 | 135 x 130 x 40 | 0.47 kg |
| 8C-PDILA1 | Digital Input Module | 32 | 135 x 130 x 40 | 0.46 kg |
| FC-IO-0001 | I/O Extension Module | Varies | 160 x 140 x 45 | 0.60 kg |
| 900G01-0101 | HC900 CPU Controller | N/A | 185 x 120 x 45 | 0.70 kg |
| 51454416-100 | Serial Interface Module | N/A | 140 x 100 x 40 | 0.50 kg |
