IAI America E-Con - Manual (Page 64)

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4.2.2 ProfiBus-DP Communication Connector
The board-end connector is a D-sub 9-pin (female) connector recommended under the ProfiBus-DP standard
EN50170.
The network connector on the other end is not supplied.
Pin No. Signal name Explanation
1 NC Not connected
2 NC Not connected
3 B-Line Communication line B (positive side)
4 NC Not connected
5 GND Signal ground
6 +5V +5-V output
7 NC Not connected
8 A-Line Communication line A (negative side)
9 NC Not connected
Housing Shield Cable shield
* 1, 2, 4, 6, 7 and 9 are not used. (These signals need not be wired.)
4.2.3 Termination switch (Bus termination settings)
Among the units connected to a ProfiBus-DP network, the devices at both ends require termination to prevent
reflected waves from entering the bus line again.
This ProfiBus-DP module provides a termination switch that makes this termination easy.
The user need not install a separate terminal resistor. Never install an additional terminal resistor, as it may
have negative impact on bus communication or cause a communication error, etc.
.
Termination switch ON Termination enabled
(If this switch is turned ON mistakenly when the module is connected in a position
other than the end of the network, bus communication may be negatively impacted
or a communication error, etc., may result.)
Termination switch OFF Termination disabled
5.2.2
5.2.3