Crestron CNHBLOCK User Manual
Crestron CNHBLOCK Multi-Type Network Distribution Block
Contents
Multi-Type Network Distribution Block: CNHBLOCK 1
Description 1
Functional Description 1
Physical Description 1
Leading Specifications 3
Installation and Wiring 3
Installation 3
Network Wiring 5
Connecting the CNHBLOCK to Cresnet Devices 5
Problem Solving 6
General Troubleshooting 6
Y and Z LED Illumination 7
Further Inquiries 7
Return and Warranty Policies 8
Merchandise Returns / Repair Service 8
Crestron Limited Warranty 8
Operation & Installation Guide - DOC. 8157 Contents •• i
Crestron CNHBLOCK Multi-Type Network Distribution Block
Multi-Type Network Distribution
Block: CNHBLOCK
Description
Functional Description
The CNHBLOCK is a Crestron control network (Cresnet) multiple connector type, network
distribution block that provides wiring for up to 15 devices and/or peripherals. The
CNHBLOCK provides 24 volts direct-current (VDC), Cresnet Y and Z data signals, and
ground through three different types of Cresnet connectors. Using any one of the connectors
as an input source, the remaining connectors may be used as outputs to other equipment. The
CNHBLOCK contains light-emitting diode (LED) indicators that monitor the input power
and input data signals.
Physical Description
The CNHBLOCK, shown on the next page, is housed in a black enclosure with silk-screened
labels. The front panel contains 16 connectors that are used to input power and Cresnet data
signals to the CNHBLOCK and output the same to Cresnet devices. All connectors are
internally wired together in parallel. Although not shown, all connectors used to attach the
Cresnet wiring to the CNHBLOCK are supplied but Crestron modular cables are not.
Also on the front panel of the CNHBLOCK are three LEDs. The LED labeled POWER
illuminates when 24VDC is attached to one connector and is available at the remaining
connectors. The Y and Z data signal LEDs are used to diagnose wiring problems of the data
signal input to the CNHBLOCK. Refer to “Y and Z LED Illumination” on page 7 for further
information.
A mounting plate is attached to the CNHBLOCK and allows the CNHBLOCK to be installed
into any location that is convenient for Cresnet wiring. The mounting plate can be removed to
install the CNHBLOCK onto the CNXRMAK Rack Mount Kit (not supplied). The
CNXRMAK is then installed into a 19-inch rack. Refer to “Rack Installation” on page 4 for
details.
Operation & Installation Guide - DOC. 8157 Multi-Type Network Distribution Block: CNHBLOCK •• 1
Multi-Type Network Distribution Block Crestron CNHBLOCK
CNHBLOCK Physical Views
1
2
24
Y
Z
G
CRESTRONCRESTRON
B C
24
Y
Z
G
CNHBLOC K
5.55 in
(14.10 cm)
Front Panel View
Bottom View
ZA11295
4
3
24
Y
Z
G
24
Y
Z
G
5
DA
E
ALL CONNECTORS ARE IN PARALLEL
24
Y
Z
G
24
Y
Z
G
6
POWER
a
7
24
Y
Z
G
Y Z
b c
8
3.30 in
(8.38 cm)
4.30 in
(10.92 cm)
6.55 in
(16.64 cm)
MADE IN THE U.S.A.
CNHBLOCK
C000000
1.33 in
(3.38 cm)
CNHBLOCK Ports
The CNHBLOCK contains three types of ports that are connected in parallel. The eight
3.5mm, 4-pin connectors (labeled 1, 2, 3, 4, 5, 6, 7 and 8) and the five 5mm, 4-pin connectors
(labeled A, B, C, D and E) are used to connect the CNHBLOCK to other Cresnet four-wire
devices. The three 6-pin, 6-position RJ11 modular ports (labeled a, b and c) are used to
connect the CNHBLOCK to modular devices in the Cresnet system. Only one port (any of
the three types) is used as an input source and the remaining ports are used as outputs.
CAUTION: Do not connect or daisy-chain more than one power input (power pack or
power supply) to the CNHBLOCK. Multiple power inputs may damage one or more
power packs and/or power supplies.
NOTE: When using the CNHBLOCK to output power to other devices, do not exceed the
maximum capacity of the power pack or power supply. Calculate and add the total power
requirements for all devices drawing power from the CNHBLOCK. If necessary, use
additional CNHBLOCKs and power packs or power supplies.
CNHBLOCK Indicators
There are three LED indicators located on the CNHBLOCK front panel. The LEDs are
described in the paragraphs on the next page.
2 •• Multi-Type Network Distribution Block: CNHBLOCK Operation & Installation Guide - DOC. 8157
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