Introduction – Contemporary Control Systems EISC Configurable Switches User Manual User Manual
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Introduction
The EISC configurable switch in the
ovides capabilities beyond those
found in standard Plug and Play (PnP) switches. Besides conventional features (auto-
negotiation, 10/100 Mbps data rate, half- or full-duplex operation, flow control), the EISC
has advanced features such as VLAN, trunking, Quality of Service (QoS) and a
programmable fault relay that can be connected to a supervisory system. Individual
port parameters can be configured by a Windows-based workstation. Ports can also be
monitored using the Modbus protocol, making it easy to interface the EISC with
supervisory control equipment. These features and more, make the EISC one of the
most versatile of Industrial Ethernet switches available.
The EISC boasts advanced features typically available only in high-end switches.
VLAN allows the physical network to be configured as multiple virtual local area
networks — limiting broadcast/multicast domains and improving performance.
Trunking allows ports to be associated in groups of four — each group functioning
as a high-speed backbone to another EISC configurable switch.
QoS provides message priority with any of three schemes: port-based priority, IP
packet or Diff/Serv priority (RFC 2474) or IEEE 802.1p priority.
Programmable Fault Relay provides a dry contact to a supervisory system if the
switch senses a condition such as the loss or addition of a link.
Configuration is typically done through a console port connected to a Windows-based
configuration program included with the product.
information are also provided so the switch can be configured or monitored by a
Modbus master device. Port parameters (data rate, duplex, flow control) can be pre-set
via the console port or auto-negotiated. And a unique feature displays a dynamic signal
strength bar graph for each port.
Each port supports the PAUSE function for full-duplex links, and uses the backpressure
scheme for half-duplex segments.
The EISC is powered from wide-range, low-voltage AC or DC sources — and redundant
power connections are available for backup considerations. It comes with the ability for
either DIN-rail or panel mounting. The switch front panel features a power LED, a Fault
Relay LED and bi-color LEDs for the link status, activity, and data rate of each port.