User manual CRESTRON CNTBLOCK

[. . . ] Power can be isolated between the two sets by disconnecting a jumper on the board. The unit provides LED indicators which help isolate wiring problems. Physical Description The CNTBLOCK is housed in a black enclosure with a silk-screened top panel (refer to figure 1). Three LEDs are located toward the center of the top panel: a green LED (POWER) and two red LEDs (NORM ON (Y) and NORM OFF (Z)). [. . . ] There are three LED indicators located on the CNTBLOCK top panel, refer to figure 1. The combination of two LEDs, NORM ON (Y) and NORM OFF (Z), and their three states of illumination, bright, dim, and off, indicate whether wiring through the CNTBLOCK is correct. Refer to table 2 for LED illumination combinations and the associated wiring conditions. Table 2. Wiring Conditions Per CNTBLOCK LED Illumination CNTBLOCK LED ILLUMINATION POSSIBLE WIRING CONDITIONS Correct Both net wires disconnected Data Y net wire correct only Data Z net wire correct only Data net wires swapped NORM ON (Y) Bright Off Bright Off Dim NORM OFF (Z) Dim Bright Bright Dim Bright POWER The green LED illuminates when 24 volts is supplied to the CNTBLOCK over the network. If the +24V line is improperly connected, the POWER LED does not illuminate. NORM ON (Y) The red LED brightly illuminates in combination with an illuminated POWER LED and a dimly illuminated NORM OFF (Z) LED during normal operating conditions. Refer to table 2 for other states of illumination. NORM OFF (Z) The red LED illuminates dimly in combination with a brightly illuminated POWER and NORM ON (Y) LED during normal operating conditions. Refer to table 2 for other states of illumination. INSTALLATION/SETUP: Power Isolation If additional power supplies are needed for a CRESNET II system, care must be taken to isolate them from one another. The CNTBLOCK offers a convenient method for isolating network devices which should be powered by separate power supplies. Removing the jumper from the circuit board isolates the 24 V lines from one side of the CNTBLOCK to the other. The jumper is clearly marked (JUMPER) on the circuit board. REMOTE CONTROL SYSTEMS 2 Specifications subject to change without notice. DOC. 8055A CRESTRON CNTBLOCK Preparation for Use Network Terminal Block Refer to figure 2 for typical hook-up diagrams of the CNTBLOCK. Complete the following steps in the order provided to ensure proper installation of the unit. NOTES 1. All CRESNET II network wiring should follow CRESTRON's network interconnection drawing. Although the CNTBLOCK can help diagnose some wiring problems, certain miswirings can cause damage to the CNTBLOCK or other network devices. [. . . ] Connect additional CRESNET II devices to the CNTBLOCK, one at a time. Ensure proper connect of each device by observing CNTBLOCK LED illumination and referring to table 2. If connecting multiple power supplies and the jumper has been removed, use a network cable to connect the second power supply to the other side of the CNTBLOCK and repeat steps 3 and 4. PROGRAMMING: The CNTBLOCK does not require any specialized programming instructions. FURTHER INQUIRIES: If after reviewing this Operations Guide you still have additional questions, please contact a CRESTRON technical support representative by dialing (888) CRESTRON [(888) 273-7876]. REMOTE CONTROL SYSTEMS 3 Specifications subject to change without notice. DOC. [. . . ]