TC Communications TC3705 User Manual page 7

10. Power Requirements
A. The TC3705's input voltage is 12V DC and current is 600mA.
B . The TC3705's power connectors are two terminal blocks located on the rear panel of the unit. Polarity
is indicated on each connector block (see Figure 2).
C. Should an external power adapter need to be replaced, use one with the following specifications: 12V
DC @600mA. You may order it directly from TC Communications.
D. The TC3705 can also be ordered with an optional 24 VDC, 48 VDC or power supply. Current
consumption at 24VDC is 300mA, at 48VDC is 150mA, and at 125VDC is 60mA.
11. System Start Up
1. Apply the power by plugging the power plug into any power jack on the rear panel. The power source
can be from a power adapter or from a power card (installed either on the left or right side of the rack).
2. The "PWR A" or "PWR B" LEDs on the front panel will light according to which power jack (A or B)
is connected. Both LEDs will light when power redundancy is utilized.
3. The "Vcc" LED should also light, indicating an adequate operating voltage is being derived from the
power source.
4. Connect the twisted pair cables to the RJ-45 connectors on the rear panel of the switches. If the twisted
pair cables are providing an Ethernet signal, then the corresponding front LEDs for that particular
channel will light as follows:
a). If 100Mbps full duplex is detected by the switch, the 100M & FULL/COL LEDs will be solidly lit and
the LINK/ACT will blink as activity is detected.
b). If 10Mbps full duplex is detected by the switch, the 100M LED will be "Off" and the FULL/COL
LED will be lit.
c). If half duplex and collisions are detected by the switch, the FULL/COL LED will be blinking.
5. Connect the optical fibers from the Tx connector of one unit to the Rx connector of the second unit, the
LINK/ACT LED of the fiber port on the second unit will be solidly lit. Do the same for the second pair
of Rx to Tx connectors and observed the LINK/ACT LED on the first unit will be lit.
7. When communication is established and traffic passes through the fiber between two TC3705's the
LINK/ACT LED will blink.
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TC3705 User's Manual
Rev. 1.2