Crestron CNHBLOCK Multi-Type Network Distribution Block Contents Multi-Type Network Distribution Block: CNHBLOCK Description Functional Description Physical Description Leading Specifications Installation and Wiring Installation Network Wiring Connecting the CNHBLOCK to Cresnet Devices Problem Solving General Troubleshooting Y and Z LED Illumination Further Inquiries Return and Warranty Policies Merchandise Returns / Repair Service Crestron Limited Warranty Operation & Installation Guide - DOC.
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.
Multi-Type Network Distribution Block Crestron CNHBLOCK CNHBLOCK Physical Views 1 2 3 24 Y Z G 4 5 24 Y Z G 6 CRESTRON A B D C 7 24 Y Z G POWER Y Z a b c 3.30 in (8.38 cm) E 24 24 24 Y Y Y Z Z Z G G G CNHBLOCK 8 24 Y Z G 4.30 in (10.92 cm) ALL CONNECTORS ARE IN PARALLEL 5.55 in (14.10 cm) 6.55 in (16.64 cm) Front Panel View Bottom View C000000 ZA11295 MADE IN THE U.S.A. CNHBLOCK 1.33 in (3.
Crestron CNHBLOCK Multi-Type Network Distribution Block POWER This LED (green) is brightly illuminated when Cresnet 24VDC power is supplied to the CNHBLOCK and available at the remaining connectors. Y During normal operation, this LED (red) is brightly illuminated when the CNHBLOCK receives the correct Cresnet Y data signal. If this LED is anything other than brightly illuminated, refer to “Y and Z LED Illumination” on page 7 for further information.
Multi-Type Network Distribution Block Crestron CNHBLOCK CNHBLOCK With Mounting Plate 1 2 3 24 Y Z G 4 5 24 Y Z G 6 CRESTRON A B C D 8 24 Y Z G POWER Y Z a b c E 24 24 24 Y Y Y Z Z Z G G G C NHBLO CK 7 24 Y Z G ALL CONNECTORS ARE IN PARALLEL Rack Installation The CNHBLOCK may also be installed into a rack by using a CNXRMAK (not supplied). Perform the following steps to install the CNHBLOCK into a rack.
Crestron CNHBLOCK Multi-Type Network Distribution Block Network Wiring When calculating the wire gauge for a particular Cresnet run, the length of the run and the load factor of each network unit to be connected must be taken into consideration. If Cresnet units are to be daisy-chained on the run, the load factor of each unit to be daisy-chained must be added together to determine the load factor of the entire chain.
Multi-Type Network Distribution Block Crestron CNHBLOCK 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. If making four-wire connections to Cresnet devices, review the latest revision of the network interconnection drawing (Doc. 5411).
Crestron CNHBLOCK Multi-Type Network Distribution Block Y and Z LED Illumination The combination of the Y and Z data LEDs, and their brightness of illumination (bright, dim, and off), indicate whether the input data signals to the CNHBLOCK are correct. Refer to the table on the next page for LED illuminations and the associated data signal conditions. NOTE: The Y and Z data LEDs are provided to denote errors with the data signal inputs to the CNHBLOCK.
Multi-Type Network Distribution Block Crestron CNHBLOCK 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 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.
