Configure The Network; Rs232 Connection To 9-Pin Connector; User Navigation - Hach Modbus Manual Del Usuario

Configure the network

D A N G E R
Electrocution Hazard. Always remove power from the instrument
before making any electrical connections.
The Modbus module provides an interface for either a RS485 network or
to an RS232 connection. Before use, the module must be configured for
the type of network. Use the switch settings on the back side of the
module for configuration (refer to the Installation section). Refer to
Table 2 for the network configuration.
Table 2 Modbus network configuration
Switch Switch ON (to the
number right)
1 RS485 network
terminated
2 RS485 biasing
3 RS485 biasing
4 RS485 selected
RS232 Modbus connection
Hold the module to look at switches 1, 2, 3, and 4 on the side. The green
wire connectors should point up.
1. Move switch 4 to the left (OFF position).
The RS232 Modbus connection is set.
RS485 Modbus connection
Hold the module to look at switches 1, 2, 3, and 4 on the side. The green
wire connectors should point up.
1. Move switch 4 to the right (ON position).
The RS485 Modbus connection is set.
8 English
Switch OFF (to the left) Function
RS485 network un- RS485 network bus
terminated termination
RS485 no biasing RS485 network biasing
RS485 no biasing RS485 network biasing
RS232 selected Select Modbus type
2. A network bus termination is required for a proper and reliable
operation and when the Modbus module will be at the end of the
network wiring. Move switch number one to the right (ON position) to
terminate the bus.
3. Move switch 2 and 3 to the right (ON position) to enable biasing if
network biasing is not provided by another device on the network.

RS232 connection to 9-pin connector

Refer to Figure 1 for the RS232 connection to the customer-supplied
computer 9-pin D-subminiature connector.
Figure 1 9-pin female connector
1 Rx (2)
2 Tx (3)
Operation

User navigation

Refer to the controller documentation for keypad description and
navigation information.
3 Ground (5)