SIMATIC Rack PC 847B
Operating Instructions, 06/2008, A5E02203168-01
31
Connecting
6
6.1
Connecting peripherals
Note before connecting
NOTICE
Connect only peripherals approved for industrial applications according to EN 61000-6-2.
Shielded interface cables must be used for interfaces integrated ex factory.
Note
Hot-plug I/O modules (USB) may be connected while the PC is in operation.
CAUTION
I/O devices that are incapable of hot-plugging may only be connected after the device has
been disconnected from the power supply.
CAUTION
Strictly adhere to the specifications in the I/O manuals.
NOTICE
The connected or built-in peripherals should not introduce a counter emf into the device.
A counter emf greater than 0.5 V to ground on the + 3.3 VDC / + 5 VDC / + 12 VDC power
rail due to a connected or integrated component can prevent normal operation or even
destroy the computer.
When measuring the counter emf, remember the following:
- The computer must be turned off and the power supply connector should be plugged in.
- During the measurement, all cables from the plant to the computer should be connected.
- All other components in the plant must be active.
Содержание SIMATIC PC 847B
Страница 208: ...Appendix A 4 Retrofitting instructions SIMATIC Rack PC 847B 208 Operating Instructions 06 2008 A5E02203168 01 ...
Страница 216: ...List of abbreviations C 1 Abbreviations SIMATIC Rack PC 847B 216 Operating Instructions 06 2008 A5E02203168 01 ...
Страница 232: ...Index SIMATIC Rack PC 847B 232 Operating Instructions 06 2008 A5E02203168 01 ...