Technical data

Hardware Information
6-33
SIMATIC Panel PC 670 Computing Unit Equipment Manual
Edition 12/01
Connection for LS120 drive (X31)
The LS120 drive for customized solutions is connected via this port. This port is
connected in parallel to the secondary IDE port. When connected, the LS120 drive
automatically becomes a master – in other words, a bootable drive – on account of
a special circuit). The maximum connection length of the data cable must not be
longer than 40 cm.
Pin
No.
X31 Meaning Pin
No.
X31 Meaning
1 RESET RESET 21 RESET RESET
2 GND Chassis ground 22 IOW_N IO Write
3 D8 Data signal D8 23 GND Chassis ground
4 D7 Data signal D7 24 IOR_N I/O read
5 D9 Data signal D9 25 GND Chassis ground
6 D6 Data signal D6 26 IORDY I/O ready
7 D10 Data signal D10 27 Reserved
8 D5 Data signal D5 28 DACK_N DMA Acknowledge
9 D11 Data signal D11 29 TBD
10 D4 Data signal D4 30 GND Chassis ground
11 D12 Data signal D12 31 Reserved Reserved
12 D3 Data signal D3 32 IOCS16 I/O Chip Select 16
13 D13 Data signal D13 33 AD_2 Address 2
14 D2 Data signal D2 34 AD_1 Address 1
15 D14 Data signal D14 35 CS3_N Chip Select 3
16 D1 Data signal D1 36 AD_0 Address 0
17 D15 Data signal D15 37 HDACT_N HD active
18 D0 Data signal D0 38 CS1_N Chip Select 1
19 GND Chassis ground 39 TBD
20 DREQ DMA Request 40 P5V +5 V power supply
41 P5V +5 V power supply
Power supply port for hard disk (X.25)
Power is supplied to the 3.5” hard disk via this port.
Pin No. Signal Meaning
1 P12V +12 V
2 GND Chassis ground
3 GND Chassis ground
4 P5V +5 V