Rockwell Automation 1746-NO8V SLC 500 8-Point Analog Output Module/ User Manual - Manual (Page 14)

Publication 1746-UM026A-EN-P - September 2003
2-6 Installation and Wiring
Choosing a Slot Location in
the Chassis When selecting a slot for the module, consider the following
conditions:
Table 2.2 Conditions for Locating the Analog Module
Condition Recommendation
SLC chassis slot 0 is reserved Place the module in any slot of an SLC 500 modular, or modular expansion chassis, except
for the extreme left slot (slot 0) in the first chassis. This slot is reserved for the processor or
adapter module.
Class 1 or Class 3 operation To use the advanced features of Class 3 operation, an SLC 5/02 or higher processor must
be used, and the module must be located in the local chassis or in a remote ControlNet
chassis with a 1747-ACN(R)15 adapter.
If the module is located in a remote I/O chassis with a 1747-ASB adapter, it will operate in
Class 1 mode, and you must use block transfer for configuration and data retrieval.
Ambient temperature Locate the module in the chassis closest to the bottom of the enclosure (where the air is
cooler) and away from modules that generate significant heat, such as 32-channel (Series
C or earlier) modules. For applications using the upper limit of the operating temperature
range, the module(s) should be placed in the right most slot(s) of the chassis. The
specification for operating temperature is 0°C to 60°C (32°F to 140°F).
Electrical noise
•
Install the SLC 500 system in a properly rated (i.e., NEMA) enclosure. Make sure
that the SLC 500 system is properly grounded.
•
Group analog and low voltage dc modules away from ac or high-voltage dc
modules, hard contact switches, relays, and ac motor drives.
•
Locate analog modules away from the chassis power supply (if using a modular
system).