User manual CRESTRON CNHBLOCK

[. . . ] 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). [. . . ] New users are required to register in order to obtain access to the FTP site 4 · Multi-Type Network Distribution Block: CNHBLOCK Operation & Installation Guide - DOC. 8157 Crestron CNHBLOCK Network Wiring Multi-Type Network Distribution Block 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. If the unit is a home-run from a Crestron system power supply network port, the load factor of that unit is the load factor of the entire run. The length of the run in feet and the load factor of the run should be used in the following resistance equation to calculate the value on the right side of the equation. Resistance Equation R< 40, 000 L x LF Where: R = Resistance (refer to next table). LF = Load factor of entire run (or chain). The required wire gauge should be chosen such that the resistance value is less than the value calculated in the resistance equation. Wire Gauge Values RESISTANCE (R) 4 6 10 15 13 WIRE GAUGE 16 18 20 22 24 (Double-CAT 5) NOTE: All 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. NOTE: When daisy-chaining Cresnet units, always twist the ends of the incoming wire and outgoing wire which share a pin on the network connector. After twisting the ends, tin the twisted connection with solder. Apply solder only to the ends of the twisted wires. Avoid tinning too far up the wires or the end becomes brittle. After tinning the twisted ends, insert the tinned connection into the Cresnet connector and tighten the retaining screw. Repeat the procedure for the other three conductors. Connecting the CNHBLOCK to Cresnet Devices 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. Operation & Installation Guide - DOC. 8157 Multi-Type Network Distribution Block: CNHBLOCK · 5 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. The document can be obtained from the Downloads page (CABLES and MANUAL Libraries) of Crestron's website (www. crestron. com). New users are required to register in order to obtain access to the FTP site. [. . . ] Crestron shall not be liable to honor warranty terms 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 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. [. . . ]