NET Concentrator System
®
NCS
- 88 -
Moore Industries-International, Inc.
www.miinet.com
Installation
Installation consists of physically mounting the unit,
completing the input connections, and grounding the
unit.
The Interface Module and external I/O modules
connect together via DB-25 connectors integrated into
the side(s) of each module.
Mounting
The NET Concentrator System Modules are designed
to snap easily onto 35mm Top Hat (EN50022) DIN-
rails.
Snap any I/O modules onto the DIN-rail to the right of
the Interface module, then slide it along the rail until
the DB25 connectors on the side of the I/O module
connect completely with the unit to its left.
Making the Electrical Connections
Refer to specific m odule sections for detailed terminal
designations and connection figures.
Contact/Load Suppression
(applies to Relay Output Module only)
When the ROM outputs are used to switch external
relay coil, contactor, solenoid or some other inductive
load, large voltage spikes may be created in nearby
cable harnesses. When excessive, these voltage
spikes can disrupt the operation of all nearby
electronics including this product. Please follow
the external relay manufacturer instructions for their
recommended relay coil suppression kits. Inductive
loads should have suppression devices installed on
the relay right across the relay coil itself. Usually this
is a simple diode for dc circuits. AC circuits routinely
use an R-C snubber.
Recommended Ground Wiring
Practices
Moore Industries recommends the following ground
wiring practices:
• Any Moore Industries product in a metal case
or housing should be grounded.
• The protective earth conductor must be
connected to a system safety earth ground
before making other connections.
• All input signals to, and output signals
from, Moore Industries’ products should be
wired using a shielded, twisted pair wiring
technique. Shields should be connected to an
earth or safety ground.
• For the best shielding, the shield should be
run all the way from the signal source to the
receiving device (see Note below).
• The maximum length of unshielded input and
output signal wiring should be 2 inches.
Note:
Some of Moore Industries’ instruments can be
classified as receivers (AIM, TIM, etc) and some
can be classified as transmitters (AOM, ROM, etc).
Hence, your shield ground connections should be
appropriate for the type of signal line being shielded.
The shield should be grounded at the receiver and
not at the signal source.
Hot Swapable I/O Modules
Should an Input/Output module need to be replaced,
simply program a new module, remove the old
module from the mounting base and snap in the
new one. For more specific instructions, see
Hot-
Swapping an I/O Module
the in
I/O Modules Section
of this manual.
Содержание NET Concentrator System AOM
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Страница 36: ...NET Concentrator System NCS 36 Moore Industries International Inc www miinet com NCS as MODBUS Master...
Страница 92: ...NET Concentrator System NCS 92 Moore Industries International Inc www miinet com Appendix B MODBUS Registers...