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8-Channel Analog Input MTA
Marshalled Termination Assemblies for ET200M Remote I/O Modules
50
A5E00482820-12
5.4
Operation
Power is supplied via two power connectors marked
L/A+
,
M/A
, and
L/B+
,
M/B
.
Each has a circuitry to detect the presence of voltage over 15 VDC and turn on the
LED indicator (green). The case of polarity reversal of the power supply is indicated
by the LEDs illuminating red. The LEDs are marked
A POWER
and
B POWER.
Incoming power from
A
and
B
is diode OR’d to provide the MTA power from either
input source. The 6ES7331-7NF00-0AB0 module does not require any power
compared to the 6ES7331-7NF10-0AB0 module. For this purpose the output from
the diodes is sent to the I/O-Module power supply.
An onboard Power Monitor System (PMS) is used to provide an isolated dry
contact when redundant power is supplied to MTAs. Only when power is supplied
to both power inputs the output contacts
1
and
2
are closed. The Power Monitor
System is designed to detect only the presence or absence of power. It is not
designed to detect supply voltage which is outside the specification threshold.
The MTA has three types of jumpers for customer use:
•
I – V
jumpers are a header and shunt type that determines the connection to
the input signal.
•
2 – 4
jumpers are a header and shunt type that determines the connection to
the input signal.
•
Isolation jumpers
MODULE 1
,
MODULE 2
are wires that can be used to cut
the shield connection between the MTA and the I/O Modules.
Field Terminals, C (
Ix+
), Channel – (
Ix-
), Sensor power (
PWx
) and Shield
(
SHx
), connect to the field devices.
PWx
is the +24 VDC power feed and the
current is limited (max. 40mA) electronically on a channel by channel basis.
The channel inputs from the MTA connect to the I/O modules inputs via the
connectors
Module1
and
Module2
. Redundant operation uses two modules with
one each connected to
Module1
and
Module2
, while non-redundant systems have
one module connected to either
Module1
or
Module2
.
Содержание ET 200M
Страница 8: ...Preface Marshalled Termination Assemblies for ET200M Remote I O Modules 8 A5E00482820 12 ...
Страница 16: ...Contents Marshalled Termination Assemblies for ET200M Remote I O Modules 16 A5E00482820 12 ...
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Страница 78: ...8 Channel RTD Input MTA Marshalled Termination Assemblies for ET200M Remote I O Modules 78 A5E00482820 12 ...
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Страница 154: ...6 Channel F Analog Input HART MTA Marshalled Termination Assemblies for ET200M Remote I O Modules 154 A5E00482820 12 ...
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Страница 270: ...8 Channel HART Analog Output MTA Marshalled Termination Assemblies for ET200M Remote I O Modules 270 A5E00482820 12 ...
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Страница 284: ...Safety Information for US Customers Marshalled Termination Assemblies for ET200M Remote I O Modules 284 A5E00482820 12 ...