Introduction - MTS Systems Level Plus Operation And Installation Manual

I

Introduction

The Level Plus® DDA monitor is an industrial quality microprocessor based data acquisition and
display system for use with the Level Plus DDA tank gauges. In its standard form, the monitor
performs the following functions:
• Provides intrinsically safe power and communications to the tank gauges (up to 8)
• Displays the following parameters:
• Provides 8 alarm contact outputs
• Provides 8 isolated 4-20 milliamp analog outputs
• Provides 1 serial asynchronous host communication port (RS485 or RS232)
AC
Power
Level Plus DDA Monitor
ASYNC
Communication
Port
- Product level, volume and mass
- Interface level and volume
- Temperature
- Alarm status
4 Wire Bus To DDA Tank Gauges
KEYPAD
DISPLAY
8 Relay 8 Isolated
Outputs 4-20 Outputs
Figure 1. Level Plus DDA System Architecture
Up To 8
DDA Tank
Gauges
1