User guide

Chapter 5
Setup and Configuration
RUGGEDCOM ROS
User Guide
126 Configuring a Serial Port
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Figure 82: Optical Loop Topology
1. RS485 Slave with Repeat On 2. RMC20 3. Multiple RMC20s 4. RMC20 in Force Half-Duplex Mode 5. RS232/422 with Repeat
On 6. RUGGEDCOM Server 7. Ethernet 8. RS485 Master
The repeat function will optically retransmit any data received on the optical receiver, in addition to any connected
serial devices. As a result, any data transmitted from the master will be retransmitted optically to all the slaves.
This topology can be used for RS232, RS485, or RS422 multi-drop networks. In all cases, all slaves have the
repeat function (DIP position 4) ON, while the one connected to the RUGGEDCOM RMC30 is configured with the
repeat function OFF. The port used on the RMC30 must be in full-duplex mode, while the ForceHD (Force Half-
Duplex) parameter must be turned ON.
Section 5.4.5
Configuring a Serial Port
To configure a serial port, do the following:
1. Navigate to Serial Protocols » Configure Serial Ports. The Serial Ports table appears.
Figure 83: Serial Ports Table
2. Select a serial port. The Serial Ports form appears.