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Please note that you must consider practical limits when the data below is applied:
• Space in the used cabinet
•CPU load
• Integrity aspects
• Availability aspects.
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No. of buses (bus extension) 1
(1)
(1) Single or redundant.
Near side bus
No. of ”nodes” (I/O subrack and/or optical modems) max. 5
Total length of el. bus extension cable max. 12 m (39 ft.)
Far side bus
Total length of optical bus extension cable max. 500 m (1640 ft.)
No. of ”nodes” (I/O subrack) max. 5
Total length of el. bus extension cable max. 12 m (39 ft.)
No. of I/O boards per subrack max. 20
(2)
(2) The maximum is 19 when S100 I/O Bus Extension redundancy is used.
No. of DI boards
DI signals
(3)
(3) This total includes S100 I/O signals, S400 I/O signals and calculated signals.
48
max. 2300
No. of DO boards
DO signals
(3)
48
max .1489
No. of AI boards
AI signals
(3)
(4)
(4) When any combination of the following analog input boards is used, the total number of analog
input channels on these boards is limited to 400:
DSAI 146 with 31 channels. DSAI 151 with 14 channels. DSAI 155A with 14 channels.
32
max. 910
No. of AO boards
AO signals
(3)
32
max . 963
No. of other board types
DSAI 133
(5)
, DSAI 133A
(
5)
DSAX110, DSAX 110A
DSDP 150
DSDP 170
DSDC 111
(6)
DSDP 140A
(6) (7)
(5) A range of modems and connection units are available for the different communication media.
See respective communication User’s Guide.
(6) DSDC 111 and DSDP 140A occupy two I/O addresses.
(7) The maximum recommended number of DSDP 140A boards is 10.
48
48
4
48
24
24