Page 1
NXT-1R/-3R/-5R Reader
NXT-1R/-3R/-5R Installation Drawing
4-Conductor - OR - CAT-5 Cabling
Beeper
LED
IO-Minus (White)
IO-Plus (Green)
Ground (Black)
+12 VDC (Red)
Shield (Silver)
Brown/Green/Orange - w/o Stripe
Brown/Green/Orange - with Stripe
Blue
Blue with Stripe
Shield (Silver)
total cable length
1,000 feet (300 m) max
Shielded 4-Conductor Cabling Shielded CAT-5 Cabling
P/N: 01999-002 - Rev. D
Installation Guide
Section 1 – Wiring and Layout Diagrams
Section 2 – Specifications and Cable Options
Section 3 – Keri Contact Information
1.0 Wiring and Layout Diagrams
1.1 NXT-1R/-3R/-5R Readers
• 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 is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expense.
• Changes to this equipment not expressly approved by Keri Systems, Inc. may void FCC certification and the user’s authority to operate
this equipment.
• Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference,
including interference that may cause undesired operation of the device.
2.0 Specifications
2.1 NXT-Reader Dimensions
• NXT-1R Euro Mount Prox Reader
- 3.25 inches tall by 3.25 inches wide by 0.5625 inches deep, not including wiring connectors
- 8.25 cm by 8.25 cm by 1.43 cm
• NXT-3R Mullion Reader
- 3.75 inches tall by 1.625 inches wide by 0.50 inches deep
- 9.52 cm by 4.13 cm by 1.27 cm
• NXT-5R Wall Switch Reader
- 4.50 inches tall by 3.00 inches wide by 0.625 inches deep, not including wiring conn ectors
- 11.43 cm by 7.62 cm by 1.59 cm
2.2 Power/Current Requirements
• 10 to 14 VDC @ 120 mA (maximum current draw at 12 VDC)
2.3 Operating Conditions
• -40°F to 150°F (-40°C to 65°C) – 0% to 90% Relative Humidity, non-condensing
Page 1 of 3 P/N: 01999-001 Rev. E
Page 2
NXT-1R/-3R/-5R Reader
Installation Guide
2.4 Cable Options
RS-485 bus runs can daisy-chain together an NXT-4x4 and NXT-Reader on one line. The total cable run distance should
be less than 500 feet from the NXT controller for runs with 4x4s and less than 1,000 feet for Reader-only runs.
NOTE: Cable resistance causes a dr op in voltage at the end of long cable runs. Ensure the appropriate power and current
for your device is available at the device at the end of the cable run. Heavier gauge cable reduces this affect.
NOTE: Keri does not recommend hot-plugging a Reader, RIM, or 4x4 into an NXT controller.
Remove power from the controller prior to connecting these devices.
Table 1: Reader and 4x4 Cable Options
Shielded, Stranded,
2 Twisted-Pa ir
a
CAT-5
b
AWG Suggest AWG Suggest
18 - Data plus
4x4 Power
22 - Data only
18 - Data plus
4x4 Power
22 - Data only
22 for Data Belden
Belden
8723
Belden
8723
8723
unshielded 18 - Data plus
4x4 Power
22 - Data only
shielded 18 - Data plus
4x4 Power
22 - Data only
shielded 22 for Data Windy City:
Connection Type
RS-485 bus
from NXT-2D/-4D
to NXT-4x4 only
RS-485 bus
from NXT-2D/-4D
to NXT-4x4
and NXT Readers
RS-485 bus
from NXT-2D/-4D
to NXT Readers only
Total
Run
Length
up to
500 feet
up to
500 feet
up to
1,000 feet
Shielded, Stranded,
4-Conductor
c
Windy City:
414302-S
West Penn: 244
Tappan:
1880AB4M-CM
Windy City:
414302-S
West Penn: 244
Tappan:
1880AB4M-CM
416303-S
West Penn: 241
Tappan:
2280AB4M-CM
a. Keri recommends this cable type for best system performance.
b. Keri’s preferred low-cost option. Keri has no suggested vendor for this type of cable.
c. Use care when routing this type of cable as it can make the system more susceptible to EMI.
Page 2 of 3 P/N: 01999-001 Rev. E
Page 3
NXT-1R/-3R/-5R Reader
Installation Guide
3.0 Contact Keri Systems
Keri USA Keri UK, Ireland, Europe
2305 Bering Drive
San Jose, CA 95131
Telephone: (800) 260-5265
(408) 435-8400
Fax: (408) 577-1792 Fax: + 44 (0) 1763 274 106
Web: www.kerisys.com Web: www.kerisystems.co.uk
E-mail: sales@kerisys.com
techsupport@kerisys.com
End of document.
Unit 17
Park Farm Industrial Estate
Ermine Street
Buntingford
Herts SG9 9AZ UK
Tel e phone: + 44 (0) 1763 273 243
E-mail: sales@kerisystems.co.uk
tech-support@kerisystems.co.uk
Page 3 of 3 P/N: 01999-001 Rev. E
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