B&K Precision 1673 - Manual - Manual (Page 10)

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15) Parallel mode indicator LED
16) Slave voltage indicator display (3-digit green 0.56” LED)
17) Slave current indicator display (3-digit red 0.56” LED)
18) Voltage adjustment knob for adjusting slave output voltage when master power is in
CV mode
19) Current adjustment knob for adjusting slave output current when master power is in
CC mode
20) Negative output terminal of the slave output
21) Ground terminal of the slave output
22) Positive output terminal of the slave output
23) CC mode LED for the slave to indicate constant current
24) CV mode LED for the master to indicate constant voltage
4.2 Rear Panel
Figure 3 – Rear Panel
25) Heat sink for dissipating the heat of power devices
26) Fan ventilation (80mm 12V DC Fan)
27) Power input socket
28) Fuse holder and input line selector
29) Input line voltage indicator (refer to  mark)