MTS Systems Level Plus - Introduction

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:
- Product level, volume and mass
- Interface level and volume
- Temperature
- Alarm status
• Provides 8 alarm contact outputs
• Provides 8 isolated 4-20 milliamp analog outputs
• Provides 1 serial asynchronous host communication port (RS485 or RS232)
Figure 1. Level Plus DDA System Architecture
KEYPAD
DISPLAY
Level Plus DDA Monitor
AC
Power
ASYNC
Communication
Port
8 Relay
Outputs
8 Isolated
4-20 Outputs
Up To 8
DDA Tank
Gauges
4 Wire Bus To DDA Tank Gauges
1