Power-Up And Led Statuses With Transceiver 21-216 - ABB Relion 670 Series Application Manual

1MRK 505 382-UEN E
cable. The outer shield around the cable consists of a braided mesh. In addition, every twisted
pair has a foil shielding.
If you use an S7FTP patch cable for ethernet, be aware that a cross-connected cable has only
pairs on pin 1-2 and 3-6 cross-connected. The two remaining pairs are not cross-connected.
Clock configuration switch
As of transceiver 21-216 revision 2, a rotary switch is added to the front panel to ease
installation and testing (see Figure 72).
When two transceivers 21-216 are used in a PDH system, they are set as slaves when an
external clock is used.
Clock synchronization configuration
The rotary switch on the front panel has 16 positions (HEX switch). At position 0 the switch's
arrow, visible through the adjusting hole, points straight down (see Figure 72). In this position,
external clock is selected (default).
IEC07000249 V1 EN-US
Figure 72: Rotary switch for clock synchronization configuration
Position
0
1
2
3
4–7
8–15
Back-to-back testing
When performing back-to-back testing with G.703 ports directly connected, one transceiver
21-216 is set as a master (internal clock).
5.5.4 Power-up and LED statuses with transceiver 21–216
To power up transceiver 21–216, connect the power cord to the transceiver, and then connect
the other end of the cord to mains. If the link does not work, try to cross-connect the fibre at
one end.
Communication set-up, 670/650 series
Application Guide
IEC07000249-1-en.vsdx
Function
External clock is selected (slave)
External clock is selected and inverted (slave)
Internal clock is selected (master)
Internal clock is selected and inverted (master)
Reserved for future use
Reserved for factory testing
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Section 5
Communication set-up
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