Configuring The Rtu Rs-232 Card; Installing The Card; Setting The Configuration Switches - Thermo Scientific APEX 100 User Manual

Configuring the RTU RS-232 Card

This section tells you how to install and configure your RS-232 Modbus Communications
Card, and how to interpret the four status LEDs on the card.

Installing the Card

To mount your RS-232 card on the APEX motherboard, do the following.
1) On the APEX motherboard, remove the HMI CPU (human-machine interface, central
processing unit) card.
2) Install the RS-232 card on the APEX motherboard by connecting the card's
application connector to the detector's COMMS1 connector. Use the APEX
Communication Module Mounting Kit to secure the card to the APEX motherboard.
3) Reinstall the HMI CPU on the motherboard.

Setting the Configuration Switches

To configure your Modbus card as an RS-232 termination node, do the following.
1) Locate the termination, node ID/baud rate, and parity switches (diagrammed below)
on the Modbus card. Set all the switches to the zero or "off" position.
2) Set DIP-switch number 5 in the parity block to the one (1) or "on" position (as
diagrammed below), because this is the switch that actually sets the Modbus card to
the RS-232 configuration. (If this switch is off, the card will be configured as an
RS-485 card.)
Thermo Scientific APEX User's Guide Page 349