Memory allocation in the dpram, Layout of the ups interface card c1230s, The charging system – BECKHOFF C9900-U3x0 User Manual
Page 18: Pin assignment st 703 ups

Technical data
Memory allocation in the DPRAM
The mentioned address means the offset from the base address of the CP
link card (e.g. CP link card on &HCC00:0000, loading controller on
&HCC00:03ED). Take care about the configuration of the PC, to avoid
overlapping with other PC cards.
Loading controller
0x03ED
UPS status
Waiting Loaded No power pack Loading
Power
pack volt.
Ext.
supply OK
0x03EC
UPS control
active
Layout of the UPS interface card C1230S
System-Bus
USV
Fronttableau
1 ST701
ST1000
1 ST702
1 ST703
The charging system
An integrated charger ensures that the battery is always kept fully charged.
The charging current is 1/3 of the full capacity, i.e. about 200-800 mA. The
charging procedure therefore takes up to 4 hours, depending on the charge
already in and the aging of the battery. Overcharging, and consequent
damage to the battery, is prevented through the use of an integrated
charging controller.
Pin assignment ST 703 UPS
PIN
Signal
PIN
Signal
PIN
Signal
1
PA0
10
PCL1
19
PB6
2
PA1
11
PCL2
20
PB7
3
PA2
12
PCL3
21
PCH0
4
PA3
13
PB0
22
PCH1
5
PA4
14
PB1
23
PCH2
6
PA5
15
PB2
24
PCH3
7
PA6
16
PB3
25
+5V
8
JUMP
17
PB4
26
GND
9
PCL0
18
PB5
C9900-U3x0
15