Fisher DPR900 User Manual page 23

hstaliation 2-3
For proper operation of DPR products, it is essential that ground
wiring be installed as indicated. To reduce electrical noise and
interference and increase safety, connect separate ground wires from
each unit to the Local Ground Bus (LGB) in the cabinet or enclosure.
The ground wire from the LGB to the plant ground should be run in
plastic or other non-ferrous material conduit. Ground connection of
the same type, i.e. dc common connections, may be to the same point
on the LGB. Never intermix dissimilar grounds.
Terminal 36, the dc common and Terminal 42, the case ground,
should always be connected to the LGB. The remaining connections
are dependent on type of input power (AC or DC).
If 14 or 16 AWG wire is used to supply AC power, the incoming
ground wire should terminate at the LGB. A second wire should be
run from the termination point on the LGB to Terminal 42. If a smaller
wire size is used, connect the incoming ground wire to Terminal 42.
Then run a second wire from Terminal 42 to the LGB.
When considering the incoming wire size, ensure that any line loss
does not exceed the voltage tolerance of the DPR unit. A power
conditioner may be required.
If the unit is mounted in a metal panel or enclosure, the panel,or
enclosure must be grounded to the DPR. Use the terminals lugs at
the rear of the mounting cassette for this purpose.
- Input/Output Signal
Wiring Terminals
I
DPR9cunm2
Terminal Block Connections Diagram
- Terminal Lugs
- Temperature
Module Socket
- Jumpers (for selecting
analog input type)
H input/Output Signal
Wiring Terminals
May 1991 UM6.1:DPR900:9102