User manual

75 Appendix B
Figure B.3: P-type Control Method in Close Loop Control
B.4 Local Input / Output
The PC Controller sends commands to the ASIC on PCI-1241/1242
through the PCI BUS. This ASIC will read or write information to local I/
O (21) based on instructions. The outputs through photo coupling isola-
tion (22) are amplified by a Darlington output stage. Inputs are also
entered to local IO (21) through photo coupling isolation (21). Besides,
Local I/O can be operated by the CPU independently from other func-
tions.
B.5 Remote Input / Output
The remote digital I/O is designed with wire-saving technology. It uses
serial communication cables to remotely control the remote I/O module
PCLD-8241 (27) via remote serial I/O interface (25). The maximum
capability is 128 outputs (28) and 128 inputs (29).