Technical specifications
A.16 Communication interfaces
S7-1200 Programmable controller
1532 System Manual, V4.2, 09/2016, A5E02486680-AK
CM 1243-5 PROFIBUS DP Master
Table A- 241 Technical specifications of the CM 1243-5
9-pin D-sub female connector
Maximum current consumption on the PROFIBUS
interface when connecting network components
(for example optical network components)
15 mA at 5 V (only for bus termination) *
)
Permitted ambient conditions
Ambient temperature
• during storage
• during transportation
• during operation with a vertical installation
(DIN rail horizontal)
• during operation with a horizontal installation
(DIN rail vertical)
• -40 °C to 70 °C
• -40 °C to 70 °C
• 0 °C to 55 °C
• 0 °C to 45 °C
Relative humidity at 25 °C during operation, with-
out condensation, maximum
95 %
Power supply, current consumption and power loss
Power supply / external
• minimum
• maximum
24 V
• 19.2 V
• 28.8 V
Current consumption (typical)
• from 24 V DC
• from the S7-1200 backplane bus
• 100 mA
• 0 mA
Effective power loss (typical)
• from 24 V DC
• from the S7-1200 backplane bus
• 2.4 W
• 0 W
Power supply 24 V DC / external
• Min. cable cross section
• Max. cable cross section
• Tightening torque of the screw terminals
• min.: 0.14 mm
2
(AWG 25)
• max.: 1.5 mm
2
(AWG 15)
• 0.45 Nm (4 lb-in)
Electrical isolation
• PROFIBUS interface to ground
• PROFIBUS interface to internal circuit
710 V DC for 1 minute
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