Rockwell Automation SA500 AC Power Modules - Manual (Page 19)

Power Module Mechanical Description 2-7
2.2.1 Fiber-Optic Ports
Transmit (XTM) and receive (RCV) ports are provided on the faceplate of the Power
Module for connection to the fiber-optic link with the UDC module in the AutoMax rack.
The Power Module is shipped with dust caps covering the fiber-optic ports. To prevent
dust accumulation and the resulting loss of signal integrity, the dust caps should not
be removed until the fiber-optic cables are installed, and should be replaced if the
cables are disconnected.
2.2.2 Rail Ports
Two rail ports (0 and 1) on the faceplate of the Power Module support direct
connection to digital and analog rail modules. All combinations of the modules listed
below are supported.
Digital I/O modules can be mixed in an I/O rail connected to the Power Module. Analog
rail modules must be used in the rail mode only. Note that Local Heads (M/N 61C22)
are not supported.
These rails receive the 5V power required for their operation through their connection
to the PMI. If the PMI is reset or power is removed, all outputs are turned off. Rail
cables must not be connected or disconnected under power.
The PMI contains the fusing for the rail I/O. The Power Module cover must be removed
to replace the rail fuse. See figure 2.3 for the location of the rail fuse. See Appendix A
for the rail fuse specification.
The rail update rate is asynchronous to the UDC task and UDC-to-PMI
communications. While the regulation algorithm is running, digital rails are updated
every 5 msec (both ports). Analog rails are updated every 20 msec (both ports).
!
ATTENTION: Turn off, lock out, and tag power to both the rack containing
the UDC module and to its corresponding PMI Regulator before viewing
the fiber-optic cable or transmitter under magnification. Viewing a
powered fiber-optic transmitter or connected cable under magnification
may result in damage to the eye. For additional information refer to ANSI
publication Z136.1-1981. Failure to observe this precaution could result
in bodily injury.
• M/N 45C001A Digital I/O Rail (J-3012)
• M/N 45C630 4-Decade Thumbwheel Switch Input Module (J-3654)
• M/N 45C631 4-Digit LED Output Module (J-3655)
• M/N 61C345 4-Channel Analog Current Input Rail (J-3689)
• M/N 61C346 4-Channel Analog Voltage Input Rail (J-3688)
• M/N 61C350 2-Channel Analog Voltage Input/Output Rail (J-3672)
• M/N 61C351 2-Channel Analog Current Input/Output Rail (J-3673)
• M/N 61C365 4-Channel Analog Current Output Rail (J-3694)
• M/N 61C366 4-Channel Analog Voltage Output Rail (J-3695)