Chapter 3 About the Micro Motion® 7951

Page 3.2

3.3 Physical description of the 7951
The main body of the 7951 is a one-piece aluminium extrusion which provides the best possible EMC protection.
The keyboard and display is attached to the front of the instrument and all electrical and communications
connectors are mounted on the Rear Panel. The 7951 is available with two types of rear Panel - one with
Klippon connectors, the other with D-type connectors.
The case contains four circuit boards. The Processor Board and the Power Supply Board are mounted
horizontally. These are connected by plugs and sockets to the Mother Board which is mounted vertically at the
back of the case. The Connector Board is parallel to the Mother Board to which it is joined.
The Keyboard and Display are wired to the Processor Board. The Connector Board holds the connectors to
which external devices are linked.
Keyboard
and display
PL1
SK3
SK2
SK1
SK4 SK5 SK6 SK7 SK8
SK1
SK2
SK3
PL1 PL2 PL3 PL4 PL5 PL6 PL7 PL8 PL9
Either... Klippon connectors
Or... D-typeconnectors
Twot ypesof
Rear Panel
Connector
Board
Power
Supply
Board
Mother
Board
Processor
Board
Figure 3.1: The 7951 and its major assemblies
3.4 Communications
The 7951 can operate as a MODBUS slave. It can:
• Download a configuration from a PC, DCS, etc.
• Upload a configuration.
• Monitor random locations in the 7951.
• Interrogate the alarm and data logger buffers.
• Manipulate the alarm and data logger buffers.
• Set random locations with new data.
• Instigate printed reports.