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Table Of Contents

NXT 2-D/4-D Controller

Installation Guide

Page 1 of 6 P/N: 01997-001 Rev. I

1.0 Wiring and Layout Diagrams

1.1 NXT-2D/-4D Controller

See Table 1 on page 2 for LED definitions.

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These

limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This

equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause

harmful interference to radio communications. Operation of this equipment in a residential area may cause harmful interference in which case the

owner will be required to correct the interference at the owner’s expense.

TB1

TB2

TB3

TB4

TB5

TB6

TB7

TB8

TB9

TB10

J8J9

J10

TB5, TB6, TB7, TB8,

U34, U35, and Relays

ARE NOT INSTALLED

on 2-Door Controllers

+12 VDC

Earth Ground

Power Ground

123

IO-Minus (White)

IO-Plus (Green)

Ground (Black)

+12 VDC (Red)

IO-Minus (White)

IO-Plus (Green)

Ground (Black)

+12 VDC (Red)

(Red) +12 VDC

(Black) Ground

(Green) IO-Plus

( White) IO-Minus

(Red) +12 VDC

(Black) Ground

(Green) IO-Plus

(White) IO-Minus

TX-Minus

TX-Plus

RX-Minus

RX-Plus

Ethernet RJ-45 Connection

Tamper

Switch

Bus 1

Bus 2

Bus 3

Bus 4

Ethernet

Direct Connection

PCB Earth Ground Lug

P/N: 01997-002 - Rev. D

RS-485

Battery

abc

de fgh i

jklm nopq

NXT-2D/4D Installation Drawing

Relay

tuvw

U32 U33

U34

U35

NO - Relay

Common / Door Lock - Relay

NC - Relay

Door Switch - Input

Ground

REX - Input

NO - Relay

Common / Door Lock - Relay

NC - Relay

Door Switch - Input

Ground

REX - Input

Ground

Door Switch - Input

NC - Relay

Common / Door Lock - Relay

NO - Relay

REX - Input

Ground

Door Switch - Input

NC - Relay

Common / Door Lock - Relay

NO - Relay

Power LED

Thermal Fuse

LED

Ethernet

Activity LEDs

RS-485 Bus

Activity LEDs

Relay State

LEDs

Utility LEDs Overcurrent LEDs

Port 1

Port 2

Port 3

Port 4

Summary of content (6 pages)

PAGE 1
NXT 2-D/4-D Controller Installation Guide 1.0 Wiring and Layout Diagrams 1.
PAGE 2
NXT 2-D/4-D Controller Installation Guide 1.
PAGE 3
NXT 2-D/4-D Controller Installation Guide 1.3 Port Protection Transorbs are provided with the controller ship kit. They are used to protect the controller from voltage spikes induced on the port wiring by absorbing the excess voltage and slowly releasing it back into the circuit. Keri strongly recommends wiring in the transorbs provided with the controller ship kit. Refer to the Transorb Wiring Diagram below.
PAGE 4
NXT 2-D/4-D Controller Installation Guide 2.0 Specifications 2.1 NXT-2D/-4D Dimensions • • 2.2 • 2.3 • • • • • • NXT Controller PCB - 6.50 inches high by 5.50 inches wide by 1.00 inch deep, not including wiring connectors - 16.51 cm by 13.97 cm by 2.54 cm NXT Enclosure - 13.00 inches high by 10.5 inches wide by 3.00 inches deep - 33.02 cm by 26.67 cm by 7.62 cm Linear Power Supply Requirements 10 to 14 VDC @ 2.
PAGE 5
NXT 2-D/4-D Controller Installation Guide Table 2: Reader and 4x4 Cable Options Connection Type Total Run Length Minimum AWG Shielded, Stranded, 2 TwistedPaira Shielded, Stranded, 4-Conductorc CAT-5b Suggest Suggest RS-485 bus  from NXT-2D/-4D  to NXT-4x4 only up to 500 feet 18 - Power 22 - Data Belden 8723 shielded Windy City: 414302-S Tappan: 1880AB4M-CM RS-485 bus  from NXT-2D/-4D  to NXT-4x4  and NXT Readers up to 500 feet 18 - Power 22 - Data Belden 8723 shielded Windy City: 4
PAGE 6
NXT 2-D/4-D Controller Installation Guide 3.0 Resetting Controllers Keri recommends resetting NXT controllers the first time these controllers are powered on. Also, under certain circumstances NXT controllers may need to be reset. NOTE: Resetting a standard NXT controller will restore the controller to a factory default state. It removes all network configuration data assigned to the controller such as the IP Address, Subnet Mask, and Gateway address. 3.1 1. 2. 3. 4. 5.