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Appendix C Technical data for the 7951
Page C.14
Link
SK8
Analogue o/p
Common
E E 0v +24V
DC Power
Analogue Power -
Protect Ground
Protect Ground
Protect Ground
Protect Ground
SK7
Group 1
Chassis and instrumentation
are earthed together unless
you cut the link
Group 2
No earthing is
required for Status
Inputs
Pin 1
Pin 25
SK3
PL1
Chassis
Earth
Earth
stud
Group 3
Connect external
earths as
required.
SK6
Pin 1
Pin 25
Density Power -
Turbine Power -
Pin 1
Pin 25
Protect Ground
SK4
Pin 1
Pin 25
Opto-isolator common only
Pin 1
Pin 9
Protect Ground
SK5
Pin 1
Pin 25
Status Output common
Pulse Output common
Protect Ground
SK2
Pin 1
Pin 9
Protect Ground
Common
SK1
Pin 1
Pin 9
Common
Common
STATUS
INPUTS
SERIAL
PORT
PULSE
and
STATUS
OUTPUTS
SERIAL
PORT
SERIAL
PORT
Figure C.2: Earthing arrangements for the 7951 (D-type connectors)