Description Of The Boards; Usb And Direct Wiring; Fig. 2 A918 Emergency Stop Board - Beckhoff C9900-G00 Series Manual

Product overview
3.2

Description of the boards

Material damage due to excessive switching voltage
An excessively high switching voltage can lead to damage to property.
• Supply the push buttons with a maximum of 24 V and a maximum switching capacity per push button of
250 mW.
This section describes and explains the PCBs for the buttons and their connections. Each PCB has
connection strips that allow you to use the push buttons and the emergency stop. The pin numbering of the
connection strips is shown on each PCB. The connector designations (CONxxx) can be found in the circuit
diagrams in Chapter 3.4 Circuit diagrams [} 20].
You can do the wiring either via a combination of USB and direct wiring or exclusively direct wiring. In the CP
configurator you may choose between the two options. Further information on the configurator can be found
in chapter 3.5 CP configurator [} 23].
The boards of the two options mentioned differ slightly. The following chapters describe the corresponding
boards.
3.2.1

USB and direct wiring

In addition, all push buttons with a normally open contact are queried via USB. Additionally, all push buttons
can be directly wired via a terminal strip using a second normally open contact.
A918 emergency stop board
Fig. 2: A918 emergency stop board
The emergency stop board A918 has a USB interface CON500 (Fig. 2, No. 1) and a K-bus interface
CON400 (No. 2). Both interfaces are used for signal transfer and are assigned ex factory. A USB-to-KBUS
coupler controls the inputs and outputs of the push buttons. In addition, a connection strip CON402 (No. 3) is
available for you to use the two additional normally closed contacts of the emergency stop. There is a
normally open contact on the KBUS. This operates on a pulse basis and does not establish a permanent
contact.
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NOTICE
Version: 2.0 C9900-G00x and C9900-G02x