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IU_26779_1_ENG_MANUAL_SEMSC11
8.
Additional information
Description of communication interfaces
8.1.
The SEM SC11 is equipped with two communication links to connect with the a panel and the SB11
extension module or a telemechanics controller.
In addition, both links allow parametrization and view of the operating status of the controller
using the ELF, FlashArm or appSC utility software.
The RS-485 standard and the MODBUS RTU protocol at 115kbps are implemented on the communication
interfaces. The X31 socket is normally used to connect with the SEM SB11 expansion module or telemechanics
controller.
Depending on the connection point of the device within the network, following types of connections are used:
Type I
– intermediate position – without RT resistor matching wave impedance of the line;
Type II
– extreme position – with RT resistor matching wave impedance of the line.
Above connection types are implemented in the by means of suitable wiring of 10-pin WAGO type 734-110
connector.
On X31 socket a pins 1 and 2 are short circuited (line A) and also a pins 3 and 4 (line B), making it easy to
connect controllers to the communication network. Devices can have an address from 1 to 247.
X41 socket (PANEL) is used to communicate with PAN 1 or PAN 3 operator panels. The connection method is
shown in Figure 8.4.
USB 2x RS-485 converter type AK 1 is dedicated for connecting the SEM SC11 with a computer via
any communication port.
Fig. 8.1. Type I – intermediate position – without RT resistor matching wave impedance of the line