Card Reader Wiring Diagram | A Comprehensive Guide
The card reader wiring diagram displays essential connections for access control systems. It would guide you through precise terminal identification, emphasizing key linkages such as D0 and D1 transmission alignment, grounding, and intricate power supply and relay connections.
Now, let’s explore terminals and their functions, connections, and review safety basics.
Card Reader Wiring Diagram Overview
The diagram below depicts a typical wiring schematic between a card reader an access control panel and a power supply. We’ll examine the purpose of each wire when making field connections.
Access Control Panel Terminal Identification
Access Controller terminals for integration:
Terminal | Color | Function |
GND | Pink | Ground |
D0 | Green | Transmit the least significant bit (LSB) of the card identification number |
D1 | White | Transmit the next least significant bit (NLB) of the card identification number |
Alarm | Grey | Alarm output |
Open | Yellow | Door input |
D_IN | Brown | Door contact input |
AC & DC | Red | +12V Power supply |
AC & DC | Black | Power supply return path |
NO | Blue | Relay normally opens contact |
COM | Purple | Relay common contact |
NC | Orange | Relay normally closed contact |
Card Reader Terminal Identification
Terminal | Color | Function |
D0 | Green | Receive the least significant bit (LSB) of the card identification number |
D1 | White | Receive the next least significant bit (NLB) of the card identification number |
GND | Pink | Ground |
V+ | Red | +12V Power supply |
Power Supply Terminal Identification
Terminal | Color | Function |
NC | Orange | Connected to the lock when the relay is not activated |
COM | Purple | Connects to the power supply and the lock |
NO | Blue | Connected to the lock when the relay is activated |
+12V | Red | Provides +12V power to the relay |
GND | Pink | Connects to the negative terminal of the power supply |
PUSH | Blue | Connected to a push button |
Access Control Panel and Card Reader Connections
- Connect D0 (green wire) from the card reader to D0 (green wire) from the access control panel to transmit card data
- Connect D1 (white wire) from the card reader to D1 (white wire) from the access control panel to transmit card data
- Connect GND (pink wire) from the card reader to GND (pink wire) from the access control panel to complete the circuit
Access Control Panel and Power Supply Connections
- Connect AC&DC (red wire) from the access control panel to +12V (red wire) from the power supply to receive power
- Connect GND (pink wire) from the access control panel to AC&DC (black wire) from the power supply to complete the circuit
- Connect NO from the access control panel to the PUSH form the power supply
Card Reader and Power Supply Connections
- Connect V+ from the card reader to the +12V (red wire) from the power supply to receive power
Relay Connections
- Connect NO (blue wire) from the access control panel relay to the door lock to activate the lock
- Connect COM (purple wire) from the access control panel relay to the power supply and door lock as a common
- Connect NC (orange wire) from the access control panel relay to the door lock to deactivate the lock
Safety Guidance for Electrical Wiring of Card Reader
Practice standard electrical safety:
- De-energize all devices before accessing
- Employ securely insulated connectors
- Avoid mixing high and low-voltage wiring
- Test functionality cautiously once powered
Thorough standards improve protection.
Basic Troubleshooting Tips
If facing reading problems:
- Methodically verify continuity from panel to reader
- Inspect connections for loose pins or shorts
- Check the voltage level at the reader
- Try different access cards to isolate bad credentials
- Consider reader replacement if unresponsive
FAQs – Frequently Asked Questions and Answers
- What is the maximum read range for card readers?
Answer: The maximum read range varies by reader technology but is typically under 12 inches for 125kHz proximity and 4 inches for 13.56MHz smart card readers when using standard credentials. Long-read range models can extend proximity detection up to 20 inches.
- What card reader technology is most secure?
Answer: 13.56MHz smart card readers with encryption represent the most secure option. The advanced credentials store encrypted codes which dynamically rotate with each presentation. This added layer prevents duplication or cloning.
- Can card readers be installed outdoors?
Answer: Yes, rugged outdoor card readers feature weatherized enclosures and potted electronics that protect against moisture, temperature extremes, and vandalism – ensuring reliable operation when mounting directly exposed to elements.
To Conclude
We have explored card reader wiring schematics, their connectivity to access panels, data communication, door controls, and ancillary functions. A sound understanding of the termination purposes empowers proper installation and operation. Following the standards outlined helps maintain robust yet safe access control across any facility.
- Card Reader Wiring Diagram Overview
- Power Supply Terminal Identification
- Access Control Panel and Card Reader Connections
- Access Control Panel and Power Supply Connections
- Card Reader and Power Supply Connections
- Relay Connections
- Safety Guidance for Electrical Wiring of Card Reader
- Basic Troubleshooting Tips
- FAQs - Frequently Asked Questions and Answers
- To Conclude
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