GE MN-ValVue-v2-8-IOM Servisní příručka stáhnout pdf (Strana 63)

100

101

Tri-Loop Configuration

Advanced Setup with ValVue

Tri-Loop Configuration

Figure 44 is a simplified schematic showing the SVI II and Tri-Loop and a control system

connection

The input channel from the control system must have an impedance of at least 250 Ohms or

else the HART signal becomes attenuated and the Tri-Loop won’t function properly. Also,

channel one must be enabled and set for Primary Variable with a range of 0-100%. You can

enable channel 2 and 3 even if you don’t connect them.

NOTE Consult the TRI-LOOP instruction manual for wring diagrams.

Masoneilan is not responsible for improperly wiring the

TRI-LOOP. This document simplifies the setup requirement of an

SVI II with a device such as a TRI-LOOP. A resistor might be

required on the positive leg of Channel 1 to limit the current to

the TRI-LOOP.

Figure 44 Tri-Loop Configuration

TRI-LOOP

MODEL 333d or 333u

Ch 3 Ch 2 Ch 1

- + - + - +

Comm Burst Input

- + - +

SVI II

+ -

Loop

Power

4-20mA

Analog

Output

Analog

Input

+ -

24Vdc

SVI II Configuration:

HART Address = 0

Set BURST MODE to HART cmd#3 (with ValVue) or PROCESS-

VARS CURRENT (with Handheld or DD enabled Host)

PV is Valve Position (0-100%)

SV is Actuator Pressure (0-120 psi)

TV = Not Used

QV= Not Used

TRI-LOOP Setup

HART address =1

CHANNEL = ENABLE

Variable = PV

Upper Range Value = 100

Lower Range Value = 0

Units: %

250ohm

1 2 ... 58 59 60 61 62 63 64 65 66 67 68 ... 659 660

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