Baer DLX - Pin Allocation of the 20 Ma;Cs Interface (Passive)

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8.3.6 Pin allocation of the 20mA/CS interface (passive)
With a passive 20mA/CS interface module (CL0, current loop) the unit can
be used in a 20mA system, as described in the standard IEC62056-21
(IEC61107).
• Max. voltage: 30VDC (open-circuit)
• Max. current: 30mA
• Baud rate: 300 to 9600 Baud (fix baud rate)
• Communication protocol: SCTM or IEC 60870-5-102
(alternatively Modbus RTU)
Pin allocation at housing for panel mounting (Com2/X5 or Com1/X6)
and at 19”-rack (only Com2/X7):
DLX (5 pins, male)
Function Pin No.
–
20mA passive, RTX
–
1
+
20mA passive, RTX
+
2
—
3
—
4
—
5
Baud rate: 300 to 9600 Baud
Pin allocation at 19”-rack (only Com1/X6):
DLX (5 pins, male)
Function Pin No.
—
1
+
20mA passive, RTX
+
2
–
20mA passive, RTX
–
3
—
4
—
5
Baud rate: 300 to 9600 Baud
Note: No galvanic isolation at the 20mA/CS interface to protection earth!