Crestron C2N-UNI8IO
Universal Keypad Interface
Operations & Installation Guide
Further Inquiries
If you cannot locate specific information or have questions after reviewing this guide, please take advantage of
Crestron's award winning customer service team by calling Crestron at 1-888-CRESTRON [1-888-273-7876].
You can also log onto the online help section of the Crestron website (www.crestron.com/onlinehelp) to ask
questions about Crestron products. First-time users will need to establish a user account to fully benefit from all
available features.
Future Updates
As Crestron improves functions, adds new features and extends the capabilities of the C2N-UNI8IO units,
additional information may be made available as manual updates. These updates are solely electronic and serve as
intermediary supplements prior to the release of a complete technical documentation revision.
Check the Crestron website periodically for manual update availability and its relevance. Updates are identified as
an “Addendum” in the Download column.
Crestron Electronics, Inc. Installation Guide - DOC. 6956B
15 Volvo Drive Rockleigh, NJ 07647 (2027241)
Tel: 888.CRESTRON 07.10
6757.767.102 :xaF
moc.nortserc.www
WARNINGS, CAUTIONS & NOTES
WARNING: To avoid fire, shock, or death; turn off power at circuit breaker or fuse and test that power is off
before wiring!
CAUTION: Insufficient power can lead to unpredictable results or damage to the equipment. Please use the
Crestron Power Calculator to help calculate how much power is needed for the system.
(www.crestron.com/calculators).
NOTES: Observe the following points.
• To be installed and/or used in accordance with appropriate electrical codes and regulations.
• If you are unsure about any part of these instructions, consult a qualified electrician.
PREPARING AND CONNECTING WIRES
Strip the ends of the wires approximately 1/2 inch (13 mm). Use care to avoid nicking the conductors. Twist
together the ends of the wires that share a connection and tin the twisted connection. Apply solder only to the
ends of the twisted wires. Avoid tinning too far up the wires or the end becomes brittle.
Specifications subject to
change without notice.
DESCRIPTION
Description
The C2N-UNI8IO is a compact interface designed to allow virtually any keypad to be
connected directly to a Cresnet control network. Cresnet is the communications backbone for
®
Crestron sensors, dimmers, keypads, touchpanels, shade controllers, thermostats, and many
other devices. This flexible 4-wire bus provides data communications and 24 Volts DC power
for all of the devices on the Cresnet network. The C2N-UNI8IO installs easily at the keypad
location, sitting conveniently inside the electrical box behind the keypad. Wiring connections
to the network are made using a detachable terminal block connector. Wiring connections to
the keypad can be made using provided cables with flying leads or the keypad manufacturer
can choose to mate directly to the exposed connectors.
The C2N-UNI8IO is compatible with most keypads that provide contact closures as user
inputs and use LEDs for feedback. Up to 1A@24VDC power* and 40mA@5VDC is available
to support a variety of keypads. The C2N-UNI8IO includes 8 sensing inputs, each capable of
sensing a contact closure. The C2N-UNI8IO also includes 8 open drain outputs capable of
sinking up to 100mA each (500mA MAX total current). Also provided are 8 current limiting
resistors that can be switched in series with each channel to limit the output current to
5mA@5VDC.
*Actual load capability dependent upon the amount of available Cresnet power in the system.
®
Applications
The following diagram shows a C2N-UNI8IO in a lighting and AV system application.
C2N-UNI8IO in a Lighting & AV System Application
Multi-Wire Cable
C2N-UNI8IO
5V 1 2 3 4 5 6 7 8 24V
OUTPUT
OUTPUT
INPUT
INPUT
G G 1 2 3 4 5 6 7 8
3rd-Party Keypad
Cresnet
Control
Processor
Lighting
System
A/V
System
Specifications
Specifications for the C2N-UNI8IO are listed in the following table.
C2N-UNI8IO Specifications
SPECIFICATION DETAILS
Power Requirements
Default Net ID
Environmental
Temperature
Humidity
Dimensions
Height
Width
Depth
Overall Diameter
Weight
Without Cables
With Cables
Heat Dissipation
2-Series Control System
Update File*
*
T
atest softw e v s
he l ar
footnotes
.
NOTE: Crestron software and any files on the website are for authorized Crestron dealers
and Crestron Authorized Independent Programmers (CAIP) only. New users may be
required to register to obtain access to certain areas of the site (including the FTP site).
ons can be obtained from the Ceson website. R
er i r tr efer O
0.5 Watt (0.02 Amps @ 24 VDC) (Does not include power
draw of attached devices.)
4D
32°F to 104°F (0°C to 40°C)
0 5
to 9 % Relative Humidity (Non-Condensing)
2.07” (53 mm)
2.05” (52 mm)
0.69” (18 mm)
2.13" (54 mm)
0.79 oz (23 g)
0.82 oz (24 g)
1W (500mA max output current)
v4.001.1012 or later
to the N T
fol
E low
ing thes
e
Physical Description
This section provides information on the connections, controls and indicators available on the
C2N-UNI8IO.
C2N-UNI8IO Overall Dimensions
0.69 in
(18 mm)
2.05 in
(52 mm)
0.51 in
(13 mm)
2
1
3 4 5 6
Connectors, Controls & Indicators
#
CONNECTORS,
CONTROLS &
INDICATORS
1, 2
(LED and button)
3
4
5
5V 1 2 3 4 5 6 7 8 24V
SETUP
OUTPUT
CURRENT
LIMIT
24 Y Z G
— NET —
OUTPUT
DESCRIPTION
(1) red LED and (1) miniature pushbutton, used for
touch-settable ID (TSID)
(1) 8-position DIP switch assigned to each individual
channel. Functions as follows:
DIP SW 'ON': Resistor bypassed. No internal current
limiting.
DIP SW ‘OFF’: Enables 1K Ohm Resistor in series.
Current limited to 5mA. Use 5V to drive LED.
(1) 4-pin 3.5 mm detachable terminal block; Cresnet
slave port, connects to Cresnet control network.
(1) 10-pin 0.1 in (3 mm) IDC connector, includes (10)
1 conductor 22 AWG 3 in. (76 mm) flying leads. Outputs
comprised of (1) 24VDC, (1) 5VDC, and (8) digital
outputs (referenced to GND).
NOTE: 24V connector is a Cresnet power pass-thru.
6
G G 1 2 3 4 5 6 7 8
INPUT
(1) 10-pin 0.1 in (3 mm) IDC connector, includes (10)
1-conductor 22 AWG 3 in. (76 mm) flying leads. Inputs
comprised (8) digital inputs and (2) GND.
SETUP
Network Wiring
When wiring the Cresnet network, consider the following:
• Use Crestron Certified Wire.
• Use Crestron power supplies for Crestron equipment.
• Provide sufficient power to the system.
CAUTION: Insufficient power can lead to unpredictable results or damage to the
equipment. Please use the Crestron Power Calculator to help calculate how much
power is needed for the system (www.crestron.com/calculators).
• For networks with 20 or more devices, use a Cresnet Hub/Repeater (e.g., DIN-HUB) to
maintain signal quality.
For more details, refer to “Check Network Wiring” on the next page.
Identity Code
The Net ID of the C2N-UNI8IO has been factory set to 4D.
The Net ID of the C2N-UNI8IO is set using Crestron Toolbox. For more details, refer to the
Crestron Toolbox help file.
When setting the Net ID, consider the following:
• The Net ID of each unit must match an ID code specified in the control system program.
• Each network device must have a unique Net ID.
2.07 in
(53 mm)
INPUT
G G 1 2 3 4 5 6 7 8
5V 1 2 3 4 5 6 7 8 24V
OUTPUT
2.13 in
(54 mm)
Regulatory Compliance
As of the date of manufacture, the C2N-UNI8IO has been tested and found to comply
with specifications for CE marking and standards per EMC and Radiocommunications
Compliance Labeling.
Federal Communications Commission (FCC) Compliance Statement
This device complies with part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
CAUTION: Changes or modifications not expressly approved by the manufacturer
responsible for compliance could void the user’s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy
and if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
Industry Canada (IC) Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du
Canada.
Installation
The C2N-UNI8IO can be installed inside a standard electrical box. Refer to the following
illustration.
Installing IDC Connector and Cresnet Connector
Removing IDC Connector
Use flat screwdriver to loosen IDC connector from header. Place between header and midsection of connector. Turn screwdriver to pry connector up.
Using a Third Party Keypad
Example Wiring Diagram
CAUTION: Shorting non-current limited supplies may cause damage to the outputs on
the unit.
Internal 5V LED Driver (Internal 5mA 5V current limit)
NOTE: Dip switches must be in the OFF position.*
5V 1 2 3 4 5 6 7 8 24V
LED
LED
LED
LED
LED
LED
LED
LED
OUTPUT
INPUT
G G 1 2 3 4 5 6 7 8
Example Wiring Diagram
External 24V LED Driver (100mA Open Collector Output)
NOTE: Dip switches must be in the ON position.*
5V 1 2 3 4 5 6 7 8 24V
Resistor / LED
Lamp
X
Relays
+
Using Internal 24 VDC Power Supply (100ma Open Collector Output)
NOTE: Dip switches must be in the ON position.*
Resistor / LED
Lamp
X
Relays
* Internal 5mA 5V current limit can be enabled or disabled on an individual basis.
OUTPUT
INPUT
G G 1 2 3 4 5 6 7 8
24VDC External Power Supply
5V 1 2 3 4 5 6 7 8 24V
OUTPUT
INPUT
G G 1 2 3 4 5 6 7 8
GND
GND
GND
GND
GND
GND
Check Network Wiring
Use Crestron Certified Wire
In order to ensure optimum performance over the full range of your installation topology,
Crestron Certified Wire and only Crestron Certified Wire may be used. Failure to do so may
incur additional charges if support is required to identify performance deficiencies because of
using improper wire.
Calculate Power
CAUTION: Use only Crestron power supplies for Crestron equipment. Failure to do so
could cause equipment damage or void the Crestron warranty.
CAUTION: Provide sufficient power to the system. Insufficient power can lead to
unpredictable results or damage to the equipment. Please use the Crestron Power
Calculator to help calculate how much power is needed for the system
(www.crestron.com/calculators).
When calculating the length of wire for a particular Cresnet run, the wire gauge and the
Cresnet power usage of each network unit to be connected must be taken into consideration.
Use Crestron Certified Wire only. If Cresnet units are to be daisy-chained on the run, the
Cresnet power usage of each network unit to be daisy-chained must be added together to
determine the Cresnet power usage of the entire chain. If the unit is home-run from a
Crestron system power supply network port, the Cresnet power usage of that unit is the
Cresnet power usage of the entire run. The wire gauge and the Cresnet power usage of the
run should be used in the following equation to calculate the cable length value on the
equation’s left side.
Cable Length Equation
L = Length of run (or chain) in feet
40,000
L <
R x P
Make sure the cable length value is less than the value calculated on the right side of the
equation. For example, a Cresnet run using 18 AWG Crestron Certified Wire and drawing 20
watts should not have a length of run more than 333 feet (101 meters). If Cresnet HP is used
for the same run, its length could extend to 1250 feet (381 meters).
NOTE: All Crestron certified Cresnet wiring must consist of two twisted pairs. One
twisted pair is the +24V conductor and the GND conductor and the other twisted pair is
the Y conductor and the Z conductor.
Strip and Tin Wires
When daisy-chaining Cresnet units, strip the ends of the wires carefully to avoid nicking the
conductors. Twist together the ends of the wires that share a pin on the network connector
and tin the twisted connection. Apply solder only to the ends of the twisted wires. Avoid tinning
too far up the wires or the end becomes brittle. Insert the tinned connection into the Cresnet
connector and tighten the retaining screw. Repeat the procedure for the other three
conductors.
Add Hubs
Use of a Cresnet Hub/Repeater (CNXHUB) is advised whenever the number of Cresnet
devices on a network exceeds 20 or when the combined total length of Cresnet cable
exceeds 3000 feet (914 meters).
Cresnet Connections
Connect the C2N-UNI8IO to the Cresnet Network via a Cresnet network cable (CRESNET
cable). This cable is not supplied with the C2N-UNI8IO but can be obtained from Crestron.
•Do not power up system until all wiring is verified. Care
should be taken to ensure Data (Y & Z), and Power
(24 & G) connections are not crossed.
•Ground Shield at the Control System end only.
•Model CNTBLOCK network terminal expander and
diagnostic tool for the Cresnet system is recommended
for testing purposes and wiring convenience.
•Jumper wires: Use #18 AWG. Use a wire nut that accommodates
all three wires.
Where:
To Control
System
G
Z
Y
24
R = 6 Ohms (Crestron Certified Wire: 18 AWG (0.75 MM ))
or 1.6 Ohms (Cresnet HP: 12 AWG (4 MM ))
P = Cresnet power usage of entire run (or chain)
Pair A
22 AWG
Twisted
Pair B
18 AWG Parallel
Wire Nuts
2
2
24
Y
Z
G
24
Y
Z
G
Problem Solving
Troubleshooting
The table after this paragraph provides corrective action for possible trouble situations.
If further assistance is required, please contact a Crestron customer service representative.
NOTE: Operation is ultimately determined by the control system program, and that must be
considered when troubleshooting.
TROUBLE
Device does not
turn on.
Device does not
function as
expected.
POSSIBLE CAUSE(S)
Device is not receiving
power from a Crestron
power source.
Device is not receiving
sufficient power.
Electrostatic discharge
due to improper
grounding.
Unit is not configured
correctly.
Incorrect programming in
control system.
Incorrect Cresnet ID
Use the provided Crestron power source.
Verify connections.
Use the Crestron Power Calculator to help
calculate how much power is needed for the
system.
Check that all ground connections have
been made properly.
Verify DIP switch settings and keypad wiring.
Check control system logic or contact
Crestron for assistance.
Cresnet ID should match in the symbol and
the device.
CORRECTIVE ACTION
Return and Warranty Policies
Merchandise Returns / Repair Service
1. No merchandise may be returned for credit, exchange or service without
prior authorization from CRESTRON. To obtain warranty service for
CRESTRON products, contact an authorized CRESTRON dealer. Only
authorized CRESTRON dealers may contact the factory and request an
RMA (Return Merchandise Authorization) number. Enclose a note
specifying the nature of the problem, name and phone number of contact
person, RMA number and return address.
2. Products may be returned for credit, exchange or service with a
CRESTRON Return Merchandise Authorization (RMA) number.
Authorized returns must be shipped freight prepaid to CRESTRON, 6
Volvo Drive, Rockleigh, N.J. or its authorized subsidiaries, with RMA
number clearly marked on the outside of all cartons. Shipments arriving
freight collect or without an RMA number shall be subject to refusal.
CRESTRON reserves the right in its sole and absolute discretion to
charge a 15% restocking fee plus shipping costs on any products returned
with an RMA.
3. Return freight charges following repair of items under warranty shall be
paid by CRESTRON, shipping by standard ground carrier. In the event
repairs are found to be non-warranty, return freight costs shall be paid by
CRESTRON Limited Warranty
CRESTRON ELECTRONICS, Inc. warrants its products to be free from manufacturing defects in materials and workmanship under normal use for a period of three (3)
years from the date of purchase from CRESTRON, with the following exceptions:
disk drives and any other moving or rotating mechanical parts, pan/tilt heads and
power supplies are covered for a period of one (1) year; touchscreen display and
overlay components are covered for 90 days; batteries and incandescent lamps are
not covered.
This warranty extends to products purchased directly from CRESTRON or an
authorized CRESTRON dealer. Purchasers should inquire of the dealer regarding
the nature and extent of the dealer's warranty, if any.
CRESTRON shall not be liable to honor the terms of this warranty if the product has
been used in any application other than that for which it was intended or if it has
been subjected to misuse, accidental damage, modification or improper installation
procedures. Furthermore, this warranty does not cover any product that has had the
serial number altered, defaced or removed.
This warranty shall be the sole and exclusive remedy to the original purchaser. In no
event shall CRESTRON be liable for incidental or consequential damages of any
kind (property or economic damages inclusive) arising from the sale or use of this
equipment. CRESTRON is not liable for any claim made by a third party or made by
the purchaser for a third party.
CRESTRON shall, at its option, repair or replace any product found defective,
without charge for parts or labor. Repaired or replaced equipment and parts supplied
under this warranty shall be covered only by the unexpired portion of the warranty.
Except as expressly set forth in this warranty, CRESTRON makes no other
warranties, expressed or implied, nor authorizes any other party to offer any
warranty, including any implied warranties of merchantability or fitness for a particular
purpose. Any implied warranties that may be imposed by law are limited to the terms
of this limited warranty. This warranty statement supersedes all previous warranties.
Trademark Information
All brand names, product names and trademarks are the sole property of their
respective owners. Windows is a registered trademark of Microsoft Corporation.
Windows95/98/Me/XP/Vista/7 and Windows NT/2000 are trademarks of Microsoft
Corporation.
the purchaser.
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