ABB 5SHX1060H0003 3BHB020538R0001 module
Technical data of product parameters
SLC5SHX1060H0003 3BHB020538R0001吃 series A chassis (1746-A4, 1746-A7, 1746-A10, and
1746-A13) manufactured before November 1992 have a resistor
between the logic ground and chassis ground as the drawing on
the following page illustrates. This resistor could be damaged if
the wiring recommendation described within the attention box
above is not followed. See the figure on the following page for
the location of the resistor. SLC 500 series A chassis (1746-A4,
1746-A7, 1746-A10, and 1746-A13) with a manufacture date of
November 1992 or later do not have this resistor. SLC 500 5SHX1060H0003 3BHB020538R0001
series B chassis have a 1 MW resistor that limits the current
between logic ground and chassis groundA hard-wired master control relay (supplied by you) provides a convenient
means for emergency controller shutdown. Since the master control relay
allows the placement of several emergency-stop switches in different locations, 5SHX1060H0003 3BHB020538R0001
its installation is important from a safety standpoint. Overtravel limit switches
or mushroom head push buttons are wired in series so that when any of them
opens, the master control relay is de-energized. This removes power to input
and output device circuits.If you are using a dc power supply, interrupt the dc side rather 5SHX1060H0003 3BHB020538R0001
than the ac side to avoid the additional delay of power supply
turn-on and turn-off. The dc power supply should receive its
power directly from the fused secondary of the transformer.
Connect the power to the dc input and output circuits through a
set of master control relay contacts.Whenever any of the emergency-stop switches are opened, power to input and
output devices is stopped.
When you use the master control relay to remove power from the external I/O
circuits, power continues to be provided to the controller’s power supply so
that diagnostic indicators on the processor can still be observed.
The master control relay is not a substitute for a disconnect to the controller. It
is intended for any situation where the operator must quickly de-energize I/O
devices only. When inspecting or installing terminal connections, replacing
output fuses, or working on equipment within the enclosure, use the
disconnect to shut off power to the rest of the system
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