Siemens APACS+ Installation And Service Instruction page 15

SD39RIO-1
•
In a non-redundant or module-to-module redundant APACS+ system, when IOBUS cable length
needs are longer than the maximum standard cable 98.4 ft (30 m), an unterminated two-
conductor shielded cable can be spliced into a standard IOBUS cable
•
In a rack-to-rack redundant or any QUADLOG system, when IOBUS cable length needs are
longer than the maximum standard cable 98.4 ft. (30 m), an unterminated six-conductor shielded
cable can be spliced into a standard IOBUS cable
2. Determine the number of racks to be installed. The Remote I/O Rack is intended for flush mounting on a
flat surface such as an instrument panel or wall.
3. If required, up to four Remote I/O Racks (marshalled I/O terminations only) can be installed in a
MODLUPAC enclosure if one or more flat panels are installed in the enclosure first. If an enclosure is
user-supplied, refer to Figure 2-2 for Remote I/O Rack dimensions and determine the desired enclosure
layout.
4. Prepare or amend system drawings to document:
•
The physical location of Remote I/O Rack(s), plug-in I/O modules, and other related items such as
power supplies and marshalled termination assemblies
•
Identify the routing of all associated cables and power wiring (e.g. DC power, twinaxial
communications cable, IOBUS, and MODULBUS). Do not assign IOBUS cables to conduits
containing telephone lines
•
The position of each backplane IOBUS Shunt (refer to section 2.5.6 for IOBUS Shunt information)
•
Each Remote I/O Rack's intended rack address and slot switch setting
5. Install needed cable raceways and conduits.
6. Install Remote I/O Racks and associated marshalled termination assemblies at their intended installation
sites. Where applicable, identify cable entrances in cabinets. Tag and route IOBUS extension cables;
pull them into the cabinets.
7. For each Remote I/O Rack, set its rack address switch and slot address range switch according to system
drawings.
8. Key and install I/O modules in the Remote I/O Rack(s). For detailed installation instructions, refer to the
information in this document and the documentation for each I/O module.
January 2001
INSTALLATION
2-3