Marshalled Termination Assembly Identification; Preparations; Environmental Considerations - Siemens QUADLOG Installation And Service Instructions Manual

Installation
2.1.2

Marshalled Termination Assembly Identification

The CAI can be used with the CAI/SAI Marshalled Termination Assembly. This assembly is identified
by the following information printed on its surface.

2.2 Preparations

1. Install the MODULRAC (SIXRAC, or Remote I/O Rack) in the cabinet where the CAI is to be
installed. The CAI should not be installed in the rack at this time; however, its designated slot
number should be known.
2. If remote I/O termination is employed, complete the following tasks:
•
If Marshalling Utility Panels are being used, install them in their respective marshalling cabinets.
•
Tag all I/O cables and route them into the marshalling cabinet. They should be ready for cable
end preparation and connection to the CAI/SAI Marshalled Termination Assemblies. Cable wire
sizes: 24 to 12 AWG.
•
Route the Interconnect I/O Cable (or Unterminated I/O Cable) between the rack in which the CAI
is to be installed and the marshalling cabinet. Refer to Figure 1-1; the J1 end of the cable is to be
installed in the rack and P2 end is to be connected to the appropriate Marshalled Termination
Assembly in the marshalling cabinet.
•
If an Unterminated I/O Cable is installed, you must supply and install the appropriate termination
hardware (terminal blocks) for field signal I/O wiring and the I/O Cable.
3. If channel diagnostics are to be used for automatically detecting wiring faults such as short or open
circuits, each channel must be wired with the appropriate resistors (and configured accordingly).
High-power EMI-producing equipment should not be connected to any power lines dedicated to CAI
input signals.

2.3 Environmental Considerations

•
Many industrial environments create severe operating conditions. The conditions at each CAI
location must be within the specifications stated in section 6.2.
•
To ensure operator safety, Marshalled Termination Assemblies shall be installed in enclosures, which
require a key or special tool to gain access to the equipment.
2-2
CAI/SAI
MARSHALLED
TERMINATION
P/N 16428-1
SDQLCAI-1
May 2002