Информатика и выч. техника \ Мультисервисные сети

Installing Cables. Procedures in Upward Cabling Mode. Installing STM-1 Cables. Procedures in Downward Cabling Mode, страница 3

7.1.1  Procedures in Upward Cabling Mode

 Warning:

Installation and removal of live power cable is prohibited.

Step

Operation

1

Before installing the cable, attach temporary marks to its both ends for distinguishing.

2

Cut off the redundant cable according to the distance between the cabinet and the power supply equipment in the equipment room. Then install appropriate connectors at both ends of the cable. When installing the connector, connect it firmly with the cable and equip it with a heat-shrink tube so as not to expose the bare core and the handle of the connector.

3

Route the power cable and the PGND cable, through the cabling hole on the enclosure frame on the top of the cabinet, to the cabinet’s DC power distribution box, as shown in Figure 7-4.

4

According to the connection relations as shown in Table 7-2, insert the end of power cables into RTN1 (+), RTN2 (+), NEG1 (-), and NEG 2(-) in turn. Screw them tight with a screwdriver.

5

According to the connection relations as shown in Table 7-2, connect the two-hole lug of the PGND cable to the grounding bolt, as shown in Figure 7-3. Fasten the nuts with a socket wrench with a proper force as to flatten the spring washer.

6

Measure the resistance between the power supply [RTN 1 (+) /RTN 2 (+)] and PGND ()/power ground [(NEG1 (-)/NEG 2(-)]. A resistance of less than 20 W indicates short circuit. Find out the reason and then install and wire the power cable and PGND cable anew.

7

Turn on the power switch of the power supply equipment, and then measure the voltage between the power supply RTN 1(+)/RTN 2(+) and the power ground NEG 1(-)/NEG 2(-). The voltage should be –48 V±20% (or –60 V±20%, if the rated input voltage is 60 V). Make sure that the anode and the cathode are connected correctly. Close the power switch of the power supply equipment.

 Caution:

If the power supply equipment outputs a voltage beyond the range, a suggestion for improvement should be given and the OptiX OSN 9500 should not be powered on.

8

Remove the temporary marks and bind the cable ties of the identification plates 2 cm away from the connectors of the cable, as shown in Figure 7-5.

 Caution:

n  The cable label is affixed to the identification plate, which faces rightward (when the power cables are vertically laid) or upward (when the power cables are horizontally laid). In both cases, make sure the side of the identification plate affixed with label is facing outside, as shown in Figure 7-5.

n  If a cable is not long enough during routing, just stop and replace it with a new one. No joint or soldering points are allowed for the cable, as shown in Figure 7-6.

1. Grounding bolt

2. PGND cable

3. Channel-1 power grounding cable

4. Channel-2 power grounding cable

5. Channel-1 power cable

6. Channel-2 power cable

7. Input cable terminal block

8. Output cable terminal block (63 A)

9. Output cable terminal block (20 A)

10. Power air switch (63 A)

11. Power air switch (20 A)

Figure 7-1 Connection positions for the power cable and the grounding cable

Table 7-2 Connection relation of the terminal blocks for power input cables

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