
Setting Up and Operating the SIMATIC Box PC 620
3.6Connecting the SIMATIC Box PC 620 to other SIMATIC S5
Point-To-Point Connection
In this section, you will learn how to connect your SIMATIC Box PC 620 to a programming device or S5 programmable logic controller using a
You can stablish a
SIMATIC Box PC 620 to another programming device or a programmable logic controller using
SA V.24 connection
SA TTY connection (optional product feature)
Configuring Interfaces with Line Current (TTY, 20 mA)
To ensure reliable data transfer, several factors must be taken into account. The maximum data transfer rate (baud rate) depends on the distance, the type of cable, the pin assignment of the interface and external interference.
You can reduce interference by choosing the right transmission cable and connecting it properly, and by observing the following guidelines:
SUse a shielded cable with a low line resistance (130 W / km) (about 40 W kft) and low capacitance (< 90 pF/m) (about 27 pF/ft).
SThe shorter the transmission link, the higher the maximum possible data transfer rate.
SIf there is an active sender and an active receiver at the same end of the transmission link, the sequence of access priority to the transmission circuit must be taken into account in order to achieve the longest possible transmission link.
SSignal lines and power lines must not run together. Signal lines must be installed as far away as possible from sources of strong interference (for example, 400 V
SThe active TTY interface with a 12 V
Note
The interference field of the source of interference is reduced by the square of the distance.
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