Baker Hughes Masoneilan SVI II ESD Quick Start Manual page 89

8.3.2 SVI II ESD 4-20mA OUT Terminals (+) and (-)
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 (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 SVI II-ESD2 is installed in accordance with flameproof requirements.
8.3.3 SVI II ESD PV 1-5VDC Terminals (+) and (-)
The Process Transmitter and the SVI II-ESD PV Input are both barrier protected. The transmitter 4 to 20
mA signal is converted to 1 to 5 volts at the Transmitter barrier. The 1 to 5 volt signal is monitored by
the DCS and used by the SVI II-ESD for the embedded process controller. The sense resistor may be in
the barrier or in the Digital Control System.
The Process Transmitter must be approved for use with the Process Transmitter Barrier. An example of a
suitable Process Transmitter barrier is MTL 788 or 788R. An example of the PV 1-5VDC Terminal
barrier is MTL 728.
8.3.4 SVI II-ESD SW Terminals (+) and (-)
There are two independent isolated solid state switch contact outputs on the SVI II-ESD. They are
labeled SW#1 and SW#2. The switches are polarity sensitive – that is, conventional current flows INTO
the plus terminal. Examples of suitable barriers are MTL 707, MTL 787 and MTL 787S.
Doc Number ES-727
Revision W
Filename ES-727.DOC
Copyright 2017 as an unpublished trade secret. This document and all information herein is the property of Dresser LLC. It is confidential
and must not be made public or copied and is subject to return upon demand.
© 2018 Baker Hughes, a GE company, LLC. All rights reserved.
Table 2, 4-20mA OUT Entity/NIFW Parameters
Vmax
Entity Parameters 30 VDC
Table 3, PV 1-5VDC Entity/NIFW Parameters
Vmax
Entity Parameters 30 VDC
Table 4, SW 1 & SW 2 Entity/NIFW Parameters
Vmax
Entity Parameters 30 VDC 125 mA
PDR ECO-
11/15/2017
0029774
Imax Ci
125 mA 8 nF 1 uH
Imax Ci
125 mA 1 nF 0 uH
Imax Ci Li
4 nF 10 uH
Written By
Checked
Page 11 of 13 Approved
Masoneilan SVI II ESD Quick Start Guide =| 89
Li Pmax
900
Li Pmax
900
Pmax
8
P.Levesque
T.Kabir
T. Kabir
13DEC2006
10JAN2007
10JAN2007