User guide

28 Unidrive M700 Getting Started Guide
Issue Number: 5
4.7 Communications connections
The Unidrive M700 product offers Ethernet fieldbus communications and the Unidrive M701 offers a
2 wire 485 serial interface. This enables the drive set-up, operation and monitoring to be carried out
with a PC or controller if required.
4.7.1 Ethernet Fieldbus communications (Unidrive M700 only)
The Unidrive M700 provides two RJ45 connections with an Ethernet switch for easy network
creation.
4.7.2 485 Serial communications (Unidrive M701 only)
The Unidrive M701 provides two parallel RJ45 connectors allowing easy daisy chaining. The drive
only supports the Modbus RTU protocol. See Table 4-2 for the connection details.
Table 4-2 Serial communication port pin-outs
4.8 Shield connections
The following guidelines should be followed to ensure suppression of radio-frequency
emission and good noise immunity. It is particularly recommended that the guidelines for the
encoder cable be followed closely in order to avoid disturbance to the encoder operation from
electrical noise.
Use the grounding bracket and grounding clamp supplied with the drive to terminate the shields at
the drive.
Figure 4-5 Grounding of signal cable shields using the grounding bracket
Pin Function
1 120 Ω Termination resistor
2RX TX
3 Isolated 0 V
4 +24 V (100 mA)
5 Isolated 0 V
6 TX enable
7RX\ TX\
8
RX\ TX\ (if termination resistors are required, link to pin 1)
Shell Isolated 0 V