ES-699 Rev F
Page 8 of 10
Notes for Intrinsically Safe Installation
1.
HAZARDOUS LOCATION
Refer to the device label for the description of the environment in which the device may be
installed.
2.
FIELD WIRING
Intrinsically Safe wiring must be made with grounded shielded cable or installed in grounded
metal conduit.
The electrical circuit in the hazardous area must be capable of withstanding an A.C. test voltage
of 500 volts R.M.S. to earth or frame of the apparatus for 1 minute.
Installation must be in accordance with Masoneilan guidelines. The installation including the
barrier earthing requirements must comply with the installation requirements of the country of
use.
Factory Mutual requirements (USA): ANSI/ISA RP12.6 (Installation of Intrinsically Safe
Systems for Hazardous (Classified) Locations) and the National Electrical Code,
ANSI/NFPA 70. Division 2 installations must be installed per the National Electrical
Code, ANSI/NFPA 70. See also, note 4.
CSA requirements (Canada): Canadian Electrical Code Part 1. Division 2 installations
must be installed per the Canadian Electrical Code Division 2 Wiring Methods. See
also note 4.
ATEX requirements (EU): Intrinsically safe installations must be installed per
EN60079-10 and EN60079-14 as they apply to the specific category.
3.
SVI-II AP (+) and (-) 4-20 mA IN Terminals
These terminals power the SVI-II AP The barrier is the Controller Output Type, for example MTL
728.
Entity Parameters: Vmax= 30 Vdc Imax=125 mA Ci = 6.5 nF. Li = 1 uH Pmax = 900 mW
.
4. SVI-II AP (+) and (-) 4-20mA OUT Terminals
These terminals provide a 4 to 20 mA signal related to valve position. The 4 to 20 OUT terminals
behave much like the terminals of a transmitter so a Transmitter type barrier with 250 Ohm series
resistance (internal or external) is used for this connection. For example MTL 788 or 788R.
Use of the 4-20 OUT feature is certified to ATEX intrinsically safe requirements and is approved
for use in Zone 0. Use of the 4-20 mA OUT feature has not been certified by FM or CSA. The 4-
20 mA OUT feature may not be used in an intrinsically safe installation when FM or CSA
intrinsically safe approval is required. The 4-20 mA OUT feature is certified by FM and CSA for
use in a DIV 2 area and in a DIV 1 area when the SVI2 is installed in accordance with flameproof
requirements.
Entity Parameters:
Vmax = 30 Vdc
Imax = 125 mA
Ci = 8 nF.
Li = 1 uH
Pmax = 900 mW.
Masoneilan Dresser
SVI II AP Quick Start Guide
A-14
Содержание Masoneilan SVI II AP-2
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