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16-Channel, 24-150 VDC/120-230 VAC Relay Output MTA
Marshalled Termination Assemblies for ET200M Remote I/O Modules
238
A5E00482820-12
18.3
Operation
Power is supplied via the removable power connector 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
13 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 power source. The output from the dual diode is sent to the I/O
modules via the module power fuses.
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.
The relay coil x connects to the I/O module. Redundant operation uses two I/O
modules. Redundant operation is achieved by connecting the diode output from
each channel on different I/O modules together. Non-redundant systems have one
I/O module connected.
18.4
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 16 DO channels, interconnects the relay output termination
assembly to the 16-channel, 24 VDC Failsafe discrete output module (
6ES7 322-
8BH01-0AB0
, E-Stand 1 or higher).
Note
To disconnect the interconnecting cable shield from ground at the MTA only, cut
and remove the shield disconnect jumper for the associated cable. See figure
15.1.
Summary of Contents for ET 200M
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Page 16: ...Contents Marshalled Termination Assemblies for ET200M Remote I O Modules 16 A5E00482820 12 ...
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