
Failsafe 10-Channel, 24-150 VDC/120-230 VAC Relay Output MTA
Marshalled Termination Assemblies for ET200M Remote I/O Modules
A5E00482820-12
221
17.3
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 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 to provide the MTA and the module
power from either input source. The output is sent to the I/O modules via the
module fuses and to the channels via the channel fuses. Module 1 Fuse supplies
the I/O Module plugged into the
Module 1 connector
and Module 2 Fuse 2
supplies power to the I/O Module plugged into the
Module 2 connector
.
Field Terminals, Normally Closed (
NCx
), Common (
COMx
), and Normally Open
(
NOx
) connect to the field devices.
NCx
and
COMx
are used to provide a normally
closed connection when the relay is not energized.
NOx
and
COMx
are used to
provide a normally open connection when the relay is not energized. The field
termination connector is removable for ease of wiring maintenance and is retained
by friction.
The relay coil x connects to the I/O modules input via the channel fuse to the
Module 1
and
Module 2 connectors
. Redundant operation uses two modules with
one each connected to the
Module 1
and
Module 2 connectors
. Redundant
operation is achieved by connecting the diode output from each channel on
different modules together. Non-redundant systems have one module connected to
either the
Module 1
or
Module 2 connectors
.
17.4
Installation Requirements
See Section 2,
, before performing any installation and observe all
warnings
A common interconnecting cable (6ES7922-3BD00-0AS0 and 6ES7922-3BJ00-
0AS0), supporting 10 DO channels, interconnects the discrete output termination
assembly to the 10-channel, 24 VDC Failsafe discrete output module (6ES7 326-
2BF10-0AB0, E-Stand 3 or higher).
Note
To disconnect the interconnecting cable shield from ground at the MTA only, cut
and remove the shield disconnect jumper,
item 5
, for the associated cable. See
Figure 17–.
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 ...
Page 26: ......
Page 136: ......
Page 166: ......
Page 196: ......
Page 236: ......
Page 252: ......
Page 278: ......