DL28 Installation and User Manual
2.3.1
Serial Connector S4
3x3.5 mm connection blocks are used to link external devices to UART1 processor with M-
Bus master interface according to EN1434. Up to 3 slave devices can be connected. S4 connector
accepts devices with M-Bus slave output such as heath meters, water meters or gas meters. Speeds
for this port connection should be in range from 300b/s to 2400b/s while data format is 8E1.
Indicator lights located above the connection blocks show status signals for sending TXD (red LED
on the right) and receiving RXD (green LED on the left).
Pin No.
Signal
Type
1
+MBus
M-Bus connector
2
-MBus
M-Bus master - connector
3
Grounding
2.3.2
Serial Connector S5
2x3.5 mm connection blocks are used to link external devices to UART2 processor with M-
Bus slave interface. Acceptable speeds for this port should be from 300b/s to 2400b/s while data
format should be set to 8E1. Indicator lights located above the connection blocks show status
signals for sending TXD (red LED on the right) and receiving RXD (green LED on the left).
Pin No.
Signal
Type
1
MBus
M-Bus slave connector
2
MBus
M-Bus slave connector
2.3.3
Serial Connector S6
RJ45 8/8 port connects external devices to UART2 processor having four RS-232C and two
RS-485 signals. Both types (RS-232C and RS-485) are active and operate simultaneously. With
“Echo” jumper on the communication board, two operating modes of RS-485 receiving can be set:
OFF (1-2 position) for disabled echo sending and ON (2-3 position) for enabled sending of echo.
Jumper “Term” enables termination on RS-485. S6 connector has parallel connection to S5
connector to enable UART2 sending/receiving through both ports.
Acceptable speeds for this port should be from 300b/s to 2400b/s while data format should be set to
8E1. Indicator lights located above the connection blocks show status signals for sending TXD (red
LED on the right) and receiving RXD (green LED on the left).
14.05.2013.
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