Emerson ROC800 Serie Instrucciones Para Un Uso Seguro página 5

Safe Use Instructions – ROC800-Series
•
Mount the upper DIN rails on the ROC800.
•
Mount the bottom DIN rails onto the backplane.
•
Seat the ROC800 onto the lower rail mounted to the
backplane, assuring that the lower edge of the
ROC800 is flush to the panel.
•
Pivot the top of the ROC800 until it is flush against the
panel.
•
Fasten the upper strip of DIN rail to the panel.
A DIN Rail Mount
Figure 4. Back of the ROC809
4. If your company has no specific grounding
requirements, install the ROC800 unit as a "floating"
(unconnected to ground) system. Otherwise, follow your
company's specific grounding practices. However, if you
are making a connection between a grounded device and
a ROC800 EIA-232 (RS-232) port, ground the ROC800
power supply.
If you must ground the equipment, observe the following
guidelines:
•
When the equipment uses a DC voltage source, the
grounding system must terminate at the service
disconnect. All equipment grounding conductors–
including wire or conduit carrying the power supply
conductors–must provide an uninterrupted electrical
path to the service disconnect.
•
Improper grounding or poor grounding practices can
often cause problems, such as introducing ground
loops into the system. Properly grounding the ROC
unit helps to reduce the effects of electrical noise on
the ROC unit's operation and protects against
lightning. Install a surge protection device at the
service disconnect on DC voltage source systems to
protect the installed equipment against lightning and
•
•
5. Wire the ROC800 through the terminal blocks on the
front of each module. The terminal blocks accept 12 AWG
or smaller wiring.
To connect the wire to the removable block compression
terminals:
•
A
•
•
The ROC800 should have a minimum of bare wire exposed
to prevent short circuits. Allow some slack when making
connections to prevent strain.
809back.dsf
a. Connect the power wiring. First determine the power
requirements and review the power wiring description in
Chapter 3 of the ROC800-Series Remote Operations
Controller Instruction Manual (part D301217X012).
Verify the hook-up polarity is correct.
To make DC power supply connections:
•
•
•
•
•
•
power surges. You may also consider a telephone
surge protector for the dial-up modem
communications module.
A pipeline with cathodic protection is not a good
ground. Do not tie common to the cathodic part of
the pipeline.
The grounding installation method for the ROC800
depends on whether the pipeline has cathodic
protection. On pipelines with cathodic protection, the
ROC must be electrically isolated from the pipeline. All
earth grounds must have an earth-to-ground rod or
grid impedance of 25 ohms or less, as measured with
a ground system tester.
Bare the end (¼ inch maximum) of the wire.
Insert the bared end into the clamp beneath the
termination screw.
Tighten the screw.
If appropriate, perform the backup configuration and
log data procedure.
Optionally, install a surge protection device at the
service disconnect.
Remove all other power sources from the ROC800.
Install a fuse at the input power source.
Remove the terminal block connector from the
socket.
Insert each bared wire end from:
o
the 12-volt dc source into the clamp beneath the
appropriate BAT+ / BAT– termination screw (see
Figure 5) OR
o
the 24-volt dc source into the clamp beneath the
appropriate + / - termination screw. The +
terminal should also have a fuse (see Figure 5) OR
Part D301201X012
Page 3