Neutron Wiring Diagrams

Neutron Wiring Diagrams

1.0 Wiring Diagrams

1.1 Controller Wiring Diagram

Controller Wiring Diagram

  • TB1 - 12VDC power input connector
  • TB2 - RS-485 network connector
  • TB3 - NXT reader connector
  • TB4 - Door sense and RTE inputs + lock relay output

 

 

1.2PC to Network Connection

The PC is connected to the Neutron network using a USB (ATC-820) RS-485 adapter. The USB connector plugs into an available USB port on the host PC and the RS-485 connection is made to any controller on the network (one connector is required per system):

 

ATC Adapter connection

 

 

1.3Controller to Controller Connections

 

Neutron Network Wiring

 

1.4RS-485 Network Wiring

This diagram illustrates an example system using the maximum 8 controllers. The USB-RS-485 adapter connects to one of the Neutron controllers and the other Neutron controllers are hard-wired together via RS-485 cable.

 

Notes:

  • The RS-485 network should be a multi-drop daisy-chain topography. Keri recommends against using a star configuration.
  • The maximum total RS-485 cable network length is 4,000 ft/1200m

Neutron Network Schematic

 

 

1.5Wiring an NXT Reader

Note: Recommended reader cable is Belden 8237 (or equivalent), this is a 2-pair shielded, stranded, twisted cable.

 

NXT Reader Wiring

 

- Pin 1 - +12VDC Output (red)
- Pin 2 - Ground + shield (black)
- Pin 3 - RS-485 A/+ (green)
- Pin 4 - RS-485 B/- (white)

 

 

1.6Wiring an NXT Exit Reader

NXT Exit Reader Wiring

 

 

1.7Request-to-Exit Input Connection

   RTE Wiring

 

 

1.8Door Contact Input Connection

NEUTRON Door Contact

 

 

1.9Fail-Safe Lock Connection

Important Notes:
  1. The Neutron ship kit comes with a 1.8amp power-supply which is enough to power the controller, 2 x NXT 1R/3R or 5R readers and a lock (with a maximum current draw of 1amp).
  2. If you will be controlling a lock with a maximum current draw greater than 1amp you should power the lock separately.
  3. Maglocks should be on their own supply due to the power surge created by these locks when locking and unlocking that could affect controller operation.
  4. Keri recommends the use of door locks from dormakaba, ASSA, and Allegion, as well as from SDC and Dortronics.

Lock Wiring - Fail Safe

 

 

1.10Fail-Secure Lock Connection

Important Notes:
  1. The Neutron ship kit comes with a 1.8amp power-supply which is enough to power the controller, 2 x NXT 1R/3R or 5R readers and a lock (with a maximum current draw of 1amp).
  2. If you will be controlling a lock with a maximum current draw greater than 1amp you should power the lock separately.
  3. Maglocks should be on their own supply due to the power surge created by these locks when locking and unlocking that could affect controller operation.
  4. Keri recommends the use of door locks from dormakaba, ASSA, and Allegion, as well as from SDC and Dortronics.

Lock Wiring_Fail_Secure

 

 

2.0Cable Recommendations
  • Input Power - Belden 8461 - two conductor, stranded, AWG 18 wire
  • NXT Readers - Belden 8723 (or equivalent) - this is a 2-pair shielded, stranded, twisted cable.
  • RS-485 Network Cable - Belden 9501 - two conductor, shielded, twisted pair, stranded, AWG 24 wire or larger (note that increasing the wire gauge does not increase the total network length... The total network length is 4,000m/16,000 feet.
  • Input and Output Connections - Belden 8461 - two conductor, stranded, AWG 18 wire.

    Note: The Lock Output relay may require a heavier gauge of wire depending upon the current demands of the lock and the length of the lock wiring run.

  • USB Adapter to PC Extension Cable - A USB extension cable can be used to extend the connection between the PC and the USB adapter - this cable should be a maximum length of 20 feet.


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