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16-Channel, 24 VDC Discrete Input MTA
Marshalled Termination Assemblies for ET200M Remote I/O Modules
A5E00482820-12
157
12.3
Operation
Power is supplied via the two removable power connectors which are retained by
screws and marked
L+A
,
MA
, and
L+B
,
MB
. Each has a LED to indicate the
presence of voltage over 15 VDC. The LEDs are marked
A POWER
and
B
POWER
. There is also a connector (
J3
) for a Power Monitor board used to indicate
the presence of both A and B power. See Section 19,
Power Monitor Board
(6ES7650-1BA02-0XX0).
Incoming power from
A
and
B
is diode OR’d, in
CR106
, to provide the MTA and
the module power from either input source. The output from
CR106
is sent to the
I/O modules via the module fuses and to the channels via the channel fuses.
Module Fuse 1 (
F100
) supplies the I/O Module plugged into
J1
and Module Fuse 2
(
F101
) supplies power to the I/O Module plugged into
J2
.
Each channel has an LED to indicate the presence of power and the fuse status. If
there is no power or the fuse is open, then the LED remains off. If there is power
and the fuse is good, then the LED is illuminated.
Field Terminals, C (
CHx+
), Channel – (
CHx-
), and Shield (
SHx
), connect
to the field devices.
CHx+
is the +24 VDC power feed and is fused (.05A) on a
channel-by-channel basis. The field termination connector is removable for ease of
wiring maintenance and is retained by friction.
The
CHx
- connects to the I/O modules input via
J1
and
J2
. Redundant operation
uses use two modules, one connected to
J1
and the other to
J2
. In non-redundant
systems, the module connects to either
J1
or
J2
.
12.4
Installation Requirements
See Section 2,
, before performing any installation and observe all
warnings
Common interconnecting cables (6ES7922-3BD00-0AM0, 6ES7922-3BJ00-0AM0,
6ES7922-3BD01-0AM0 or 6ES7922-3BJ01-0AM0), supporting 16 DI channels,
interconnect the discrete input termination assembly to the 16-channel, 24 VDC
discrete input module (6ES7 321-7BH01-0AA0, E-Stand 2 or higher).
Note
To disconnect the interconnecting cable shield from ground at the MTA only, cut
and remove the shield disconnect jumper, W100 and W101, for the associated
cable
12.5
Maintenance
See Section 3,
, before performing any maintenance and observe all
warnings
Under normal operation, the
A/B
Power LED,
the
Module 1/2 Fuse LED,
and all
the
Channel Fuse LEDs
are on. If all are off, check the power supply to MTA. If
the
A/B
Power LED
is off, check the power supply to the MTA. If the
Module 1/2
Fuse LED
is off, check and replace the module fuse. If the
Channel Fuse LED
is
off, check and replace the channel fuse.
Summary of Contents for ET 200M
Page 8: ...Preface Marshalled Termination Assemblies for ET200M Remote I O Modules 8 A5E00482820 12 ...
Page 16: ...Contents Marshalled Termination Assemblies for ET200M Remote I O Modules 16 A5E00482820 12 ...
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