ELECTRICAL CONNECTIONS
5
5.3 HOST INTERFACES
SC4000 offers two serial interfaces in order to meet any connectivity requirement:
Host 1 Interface : RS232/RS485 software selectable and optoisolated for data
transmission to Host.
Host 2 Interface : RS232/RS485 software selectable for data transmission to Host or
Data Source for additional reading device in Pass Through (for example a Hand Held
Reader).
CAUTION
Do not connect to the Host 1 Interface spring clamp terminals if using Host
Interface Modules (Fieldbus and non Fieldbus) with the SC4000.
The signals relative to the following serial interface types are available on the SC4000 spring
clamp terminal blocks.
The host serial interface types and their line parameters (baud rate, data bits, etc.) can
be defined by the user via Genius™ software. The RS485 half duplex is automatically
set whenever MUX32 communication protocol is enabled. For more details refer to the
"Communication Settings" section in the Help On Line.
Details regarding the connections and use of the interfaces are given in the next paragraphs.
5.3.1 Host 1 Interface
RS232 Interface
The RS232 interface can be used for connection to the host computer to transmit code data.
The following pins are used for RS232 interface connection:
Pinout
Function
TX Transmit
Data
RX Receive
Data
RTS
Request To Send
CTS
Clear To Send
SGND Signal
Ground
It is always advisable to use shielded cables. The overall maximum cable length must be
less than 15 m (49.2 ft).
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