Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of the WAGO Electronic Circuit Breaker, Model 787-3668. This 8-channel device is designed for 24VDC input voltage, offering adjustable current settings from 1-10A, and includes a signal contact for enhanced system monitoring. Please read this manual thoroughly before installation and operation.
Product Overview
Figure 1: The WAGO Electronic Circuit Breaker Model 787-3668, shown with its main unit and three included pluggable connectors. The main unit is a rectangular, off-white device with ventilation slots on top and an array of eight green LED indicators on its front face, corresponding to eight channels. Below the LEDs, the model number "787-3668" is visible. The connectors are black, plastic, and designed for easy wiring, with one larger 8-pin connector and two smaller 2-pin connectors.
The WAGO 787-3668 is an electronic circuit breaker designed to protect 24VDC power supplies and loads from overcurrents and short circuits. It features eight independent channels, each with an adjustable current trip setting. The integrated signal contact provides remote status indication, allowing for proactive system management.
Key Features:
- 8 independently monitored channels.
- Adjustable current trip settings from 1A to 10A per channel.
- 24VDC input voltage compatibility.
- Integrated signal contact for status feedback.
- Compact design for DIN rail mounting.
Safety Information
Always adhere to local and national electrical codes and regulations. Installation and maintenance should only be performed by qualified personnel. Disconnect power before working on the device or connected circuits. Ensure proper grounding. Do not operate the device if it appears damaged.
Setup and Installation
Mounting:
The WAGO 787-3668 is designed for DIN rail mounting. Ensure adequate ventilation space around the unit.
Wiring Connections:
Refer to the wiring diagram below for correct connections. Use appropriate wire gauges for the expected current loads.
- Input Power (24VDC): Connect the 24VDC power supply to the designated input terminals. Observe polarity.
- Output Channels (1-8): Connect each load to its respective output channel.
- Signal Contact: Connect the signal contact terminals to your monitoring system for status indication. This is typically a normally open (NO) or normally closed (NC) contact, consult the device labeling for specific configuration.
Note: The device uses pluggable connectors for easy wiring and maintenance. Ensure all connectors are securely seated after wiring.
Operating Instructions
Current Setting:
Each channel has an individual rotary switch or similar mechanism for setting the trip current from 1A to 10A. Set each channel's current according to the maximum operating current of the connected load, ensuring a suitable safety margin.
Status Indicators:
Each channel is equipped with an LED indicator:
- Green LED: Channel is active and supplying power.
- Red LED: Channel has tripped due to overcurrent or short circuit.
- No LED: Channel is off or no power is supplied to the unit.
Resetting a Tripped Channel:
If a channel trips (red LED), identify and resolve the cause of the overcurrent or short circuit. Once the fault is cleared, the channel can typically be reset by cycling the power to the unit or by a dedicated reset mechanism if available (consult device labeling for specific reset procedure).
Maintenance
The WAGO 787-3668 is designed for minimal maintenance. Periodically inspect the unit for:
- Loose connections.
- Signs of physical damage or overheating.
- Accumulation of dust or debris (clean with a soft, dry cloth if necessary).
Ensure proper ventilation is maintained around the unit to prevent overheating.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Channel LED is Red | Overcurrent or short circuit on the channel. | Identify and clear the fault on the connected load. Reset the channel. |
| No LEDs illuminated | No input power to the unit or unit is off. | Check 24VDC input power supply and connections. Ensure unit is powered on. |
| Channel trips immediately after reset | Persistent fault on the load or incorrect current setting. | Thoroughly inspect the load for short circuits or excessive current draw. Verify the channel's current setting matches or exceeds the load's normal operating current. |
| Signal contact not working | Incorrect wiring or monitoring system issue. | Verify signal contact wiring. Check the configuration of the monitoring system. |
Specifications
| Parameter | Value |
|---|---|
| Model Number | 787-3668 |
| Input Voltage | 24VDC |
| Number of Channels | 8 |
| Adjustable Current Range (per channel) | 1A - 10A |
| Signal Contact | Yes |
| Mounting Type | DIN Rail |
| Manufacturer | WAGO |
Warranty and Support
This WAGO product is covered by the manufacturer's standard warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official WAGO website. For technical support, troubleshooting assistance, or to inquire about repairs, please contact WAGO customer service.
WAGO Contact Information:
Please refer to the official WAGO website for the most current contact details, including phone numbers and email addresses for your region.
