Digital Inputs And Outputs; Communications - Emerson Daniel Danalyzer 1000 Hardware Reference Manual

MODEL 1000
2.3.1.2

Digital Inputs and Outputs

The Controller has the capability of sixteen digital inputs used as follows:
5 - to read a Modbus address, as defined by DIP switch positions.
2 - to indicate presence and type of front panel as defined by switch positions
1 - Spare
1 - temperature sensor input to shut off LCD backlight
1 - GC alarm, optically isolated, with transient protection
5 - stream flow alarms, optically isolated, with transient protection
1 - photocell detector, front panel backlight (night on, day off)
The Controller has the capability of 22 digital outputs used as follows:
6 - Analyzer control
8 - driver outputs for DC air solenoids (stream switching, 12 total streams)
5 - alarms, optically isolated, with transient protection
3 - front panel indicators (green, yellow, red)
The digital transient-protected discrete outputs can furnish up to 50 mA. If more current is
required (up to 0.5A), a special transient protection plug-in module should be installed (see
Appendix C, this manual, for transient protection module details).
2.3.1.3

Communications

There are 3 to 8 communication ports externally available (depending on options package selected).
The communications ports can use either RS-232, RS-422, or RS-485 protocol, selected by Data
Interface Chips via the CPU Board. The communications ports on these boards are normally
configured at the factory, as specified by the customer's communications requirements. The Modbus
switch positions are also normally set at the factory as specified by the customer. If any changes
need to be made in the field, refer to the drawings in the rear of this manual.
EQUIPMENT DESCRIPTION
SEP 2005
2-13