Product manual

Troubleshooting Tools
34 Product Manual
D-sub connector
3.4 X9 Maintenance plug
3.4.1 Power supply
Supply voltages can be measured at the following points:
There is a 10 kΩ resistor between each power supply line and the test terminal to pre-
vent damage by a short circuit.
ACOK: Follows the AC power input without delay. High (= 5V) when power is OK.
DCOK: Follows the supply unit energy buffer. After power on, DCOK goes high (=5
V) when output voltages are stable.
X1 X2
Pin Signal Pin Signal
11TXD
2 RXD 2 TXD N
3TXD 3RXD
4 DTR 4 RXD N
5 0 V 5 0 V
6DSR 6DATA
7 RTS N 7 DATA N
8 CTS N 8 DCLK
99DCLK N
X9
Pin Row A Row C
28 ACOK DCOK
29 + 5V_TST 0V
30 + 15V_TST 0V
31 15V_TST 0V
32 + 24V_TST 0V