Power Supply Pins; How To Connect Unused Network Connector Pins - HMS Anybus CompactCom B40-1 Design Manual

Network Connector
4.2

Power Supply Pins

Signal Name
GND
3V3
4.3

How to Connect Unused Network Connector Pins

For Ethernet versions of the Anybus CompactCom B40-1 it is recommended to terminate
Ethernet signals in the network interface if one of the Ethernet ports is unused. For the 10/100
Mb/s hardware version it is sufficient to terminate pair no. 1 and 2, for the port of concern,
while for the 1 Gb/s hardware version this has to be done for pair no. 1, 2, 3, and 4.
Fig. 24
Unused fibre optic connector pins should be connected as follows:
• 100R between TXP and TXN
• 820R between SDN and 3V3, resulting in 2 V on SDN
• 1k5 between SDP and 3V3, resulting in 1.5 V on SDP- Indicates that no signal is received. A
signal amplitude of 0.5 V is appropriate.
• 4k7 between SCL and 3V3
• 4k7 between SDA and 3V3
Other network signals may be left floating when not used.
Anybus ® CompactCom B40-1 Design Guide
Type Pin No. Description
Power 2, 6, 10, Ground
14, 18, 28,
Power and signal ground reference.
32, 36, 40,
44, 52
Power 1, 27, 51 3.3 V power supply.
43 (78)
HMSI-27-230 3.4 en-US