
Installation
July 2009 2-3
Temperature Classification:
T4 at Ta v80C
T5 at Ta v40C
Refer to table 1-5 for additional approval information,
figure C-4 for the ATEX loop schematic, and figure
C-5 for the ATEX nameplate.
IECEx
Conditions of Certification
Intrinsic Safety
This equipment shall be connected in accordance with
the manufacturer’s installation instructions to intrinsic
safety barriers that satisfy the following parameters for
each set of terminals.
Main4−20 mA: Ui = 30 V, Ii = 130 mA, Pi = 1W, Li = 0.55 mH,
Ci = 10.5 nF
XMTR circuit: Ui = 28 V, Ii = 100 mA, Pi = 1W, Li = 0 mH,
Ci = 5 nF
Limit Switch 1
(LS1): Ui = 16 V, Ii = 76 mA, Pi = 1W, Li = 0 mH,
Ci = 5 nF
Limit Switch 2
(LS2): Ui = 16 V, Ii = 76 mA, Pi = 1W, Li = 0 mH,
Ci = 5 nF
Refer to table 1-6 for additional approval information,
figure C-6 for the IECEx loop schematic, and figure
C-7 for the IECEx nameplate.
NEPSI
Notes for Safe Use of the Certified Product
Intrinsic Safety
DVC2000 digital valve controllers (designated as
controller hereafter) have been proved to be in
conformity with the requirements specified in the
national standards GB3836.1-2000 and
GB3836.4-2000 through inspections conducted by
National Supervision and Inspection Centre for
Explosion Protection and Safety of Instrumentation
(NEPSI). The Ex marking for the products is Ex ia II
CT4/T5 and their Ex certificate number is GYJ06281.
When using the product , the user should pay
attention to the items stated below:
1. The enclosure of the controller provides a
grounding terminal, and the user should install a
reliable grounding wire connected to it when mounting
and using the controller.
2. The controller’s cable entrance (M20x1.5 or 1/2
NPT) must be fitted with a cable entry device which is
Ex-approved through inspection of explosion
protection.
3. The maximum operating ambient temperature
range of the controller is −20C to +80C, which is
related to temperature grouping as follows:
T4: −20C to +80C; T5: −20C to +40C
4. The approved parameter values for safe use with
different controller loops are as follow:
LoopStyle Ui (V) Li (mA) Pi (W) Li (mH) Ci (nF)
Primary 4 to 20mA 30 130 1 0.55 5
XMTR Input 28 100 1 0 5
Limit switch LS1 16 76 1 0 5
Limit switch LS2 16 76 1 0 5
While the controller forms an intrinsically safe
explosion protection system together with an
associated equipment, the following requirements
must be met:
Uo vUi , Io vIi , Po vPi , Co wCi + Cc , Lo wLi + Lc .
(Note: Where Cc and Lc represent distributing
capacitance and inductance of the connecting cable
respectively.)
5. The user must not be allowed to replace at will the
internal electric components of the product on his own
to prevent affecting performance of explosion
protection of the product.
6. The user must follow the relevant rules specified by
the product instruction manual, the “13th Section of
Electric Equipment Used in Explosive Gaseous
Environment: Maintenance of Electric Equipment Used
in Explosive Gaseous Environment” of
GB3836.13-1997 standard, the “15th Section of
Electric Equipment Used in Explosive Gaseous
Environment: Electric Installation in Hazardous
Locations (except for coal mine)” of GB3836.15-2000
standard and the “Electric installation construction and
acceptance test code for electric equipment mounting
engineering in an explosive and fire−hazardous
environment” of GB50257:1996 standard while
performing installation, operation, and maintenance for
the product.
Valve / Actuator Mounting
If ordered as a part of a control valve assembly, the
factory will mount the digital valve controller on the
actuator and calibrate the instrument. If you purchased
the digital valve controller separately, you will need a
mounting kit to mount the digital valve controller on the
actuator. The following procedures are general
guidelines you should consider when mounting the
digital valve controller. See the instructions that come
with the mounting kit for detailed information on
mounting the digital valve controller to a specific
actuator model.
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