Series 651T/652T/653T Isolator User’s Manual Process Current Two-Wire Transmitters
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- 3 -
Key 65xT Features…continued
•
Hardened For Harsh Environments
- The unit will operate
reliably in harsh industrial environments and includes
protection from RFI, EMI, ESD, EFT, and surges, plus low
radiated emissions per CE requirements.
•
Convenient Mounting, Removal, & Replacement
- The
DIN-rail mount and plug-in type terminal blocks make
module removal and replacement easy.
2.0 PREPARATION FOR USE
UNPACKING AND INSPECTION
Upon receipt of this product, inspect the shipping carton for
evidence of mishandling during transit. If the shipping carton is
badly damaged or water stained, request that the carrier's agent
be present when the carton is opened. If the carrier's agent is
absent when the carton is opened and the contents of the carton
are damaged, keep the carton and packing material for the
agent's inspection. For repairs to a product damaged in
shipment, refer to the Acromag Service Policy to obtain return
instructions. It is suggested that salvageable shipping cartons
and packing material be saved for future use in the event the
product must be shipped.
This module is physically protected with
packing material and electrically
protected with an anti-static bag during
shipment. However, it is recommended
that the module be visually inspected for
evidence of mishandling prior to
applying power.
This circuit utilizes static sensitive
components and should only be handled
at a static-safe workstation.
INSTALLATION
This isolator module is packaged in a general purpose plastic
enclosure. Use an auxiliary enclosure to protect the unit in
unfavorable environments or vulnerable locations, or to maintain
conformance to applicable safety standards. Stay within the
specified operating temperature range. As shipped from the
factory, the unit has already been calibrated for 4-20mA I/O. To
verify calibration, see CALIBRATION section.
WARNING:
Applicable IEC Safety Standards may require that
this device be mounted within an approved metal enclosure or
sub-system, particularly for applications with exposure to voltages
greater than or equal to 75VDC or 50VAC.
Mounting
Refer to Enclosure Dimensions Drawing 4501-728 for
mounting and clearance dimensions.
DIN Rail Mounting:
This module can be mounted on "T" type
DIN rails. Use suitable fastening hardware to secure the DIN rail
to the mounting surface. Units may be mounted side-by-side on
1-inch centers for limited space applications.
"T" Rail (35mm), Type EN50022:
To attach a module to this
style of DIN rail, angle the top of the unit towards the rail and
locate the top groove of the adapter over the upper lip of the rail.
Firmly push the unit towards the rail until it snaps solidly into
place. To remove a module, first separate the input terminal
block(s) from the bottom side of the module to create a clearance
to the DIN mounting area. Next, insert a screwdriver into the
lower arm of the DIN rail connector and use it as a lever to force
the connector down until the unit disengages from the rail.
Electrical Connections
Terminals can accommodate wire from 14-24 AWG, solid or
stranded. Since common mode voltages can exist on signal
wiring, adequate wire insulation should be used and proper wiring
practices followed. Input wiring may be shielded or unshielded
twisted-pair. Output wires should be twisted pair. Strip back wire
insulation 1/4-inch on each lead before installing into the terminal
block. It is recommended that output wiring be separated from
the input wiring for safety, as well as for low noise pickup. Note
that each channel’s terminal block is of a plug-in type that can be
easily removed to facilitate module removal or replacement,
without removing individual wires. To prevent electric shock, be
sure to remove the I/O signal before unplugging the terminals to
uninstall the module or before attempting service. All
connections should be made with I/O signals removed.
Power, input, and output I/O wiring must be in accordance
with Class 1 Division 2 wiring methods, Article 501-4(b) of the
National Electrical Code, NFPA 70, for installations in the U.S., or
as specified in Section 18-1J2 of the Canadian Electrical Code for
installations within Canada and in accordance with the authority
having jurisdiction.
CAUTION:
Risk of Electric Shock - More than one disconnect
switch may be required to de-energize the equipment before
servicing.
WARNING:
Explosion Hazard - Substitution of components
may impair suitability for Class 1 Division 2.
WARNING:
Explosion Hazard - Do not disconnect equipment
unless power has been switched off or the area is known to be
non-hazardous.
1.
DC Current Input (Each Input):
Connect input(s) per
Drawing 4501-727. Observe proper polarity. Current is
delivered to the “IN+” terminal and returned via the “IN-“
terminal. The input voltage drop of this unit is less than 1.5V
typical. Reverse polarity protection is included.
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