... the far end of Ethernet
24V ethernode®:
ETH-A7-4IO
- Digital in- and outputs at the Ethernet in IP65-box
- Two serial interfaces, see details about hardware und software at ETH-A7-2SER
- Digital inputs:
- 4 opto-decoupled inputs 24V
- Overcharge-protected digital outputs:
- 4 High-side (P-switching) outputs 1A@24V
- 200µs switching-speed
- nodeAccess for direct I/O-access from Windows® PCs
- mCAT-Server-Pages (mSP) opens I/O-functions for the webbrowser
- mCAT Express-I/O can convert the inputs into counters and the outputs into impulse generators
- Express-I/O access for local tasks, e.g. for socket interfaces
- All terminals over cage clamps
- Separate +24V/ground terminals for external units
- Insulating plate prevents trackcontact
- Accesses are marked on the insulating plate - clamps are blank for your own inscription
- Optionally remote control with PoE - therewith isolated interfaces
ethernode® ETH-A7-4IO offers four digital inputs and four P-switching, short-circuit proof 24VDC-outputs at the Ethernet - additionally two serial interfaces and an optional LCD. This page only points out the special I/Os of the ETH-A7x-4IO. You find the basics at ethernode as well as at ethernode LCD for the LCD version. The details of the serial interfaces of every version is described at ETH-A7x-2SER.
In general relays offer more flexibility when you integrate external devices in the Ethernet. But the 24V outputs of modern High-Side-drivers have got even more advantages if you know, that there is a 24V d.c. voltage: While relay-contacts resent a short-circuit, IC drivers limit the current on save values, the switching-speed is much higher and the mechanical abrasion of a relay is omitted.
ETH-A7x-4IO has got 4 digital 24V inputs on optocouplers, which interconnect if a tension over about 18V is applied. So you can use simple switches that are feeded with 24V. These 24V are located on the cage clamps beside each input and they are feeded either by the external 24V power supply or - at the PoE option - by the Ethernet cable from the PoE switch.
The 24V outputs are resilient over the whole temperature range up to 1A. If only one output is used, it can switch up to 2,9A. ETH-A7-4IO is a ****teilbestückte**** version of the ETH-A7-3A4IO.
Software
For adressing the serial interfaces please see ETH-A7x-2SER. The inputs and relays are similarly multifaceted adressable:
If you wish an autarc function of ETH-A7-4I4R, you have to programm your application task in C and to load it with the aid of the mCat monitor SYSMON at first into the RAM and later on into the flash on the ethernode-A7-CPU. Process in- and outputs of mCat are available with convenient I/O functions with in(...) and out(...) macros, the so-called Express-I/O. If you want to communicate with other tasks, send and receive messages e.g. of SerDrv for serial periphery. The Ethernet communication usually runs over the Socket-Interface.
You can access all in- and outputs that are supported by Express-I/O directly from a Windows® PC over our nodeAccess™-DLL. Therefor no programming on ethernode is required, but though you do not achieve an autonomous functionality in case of a breakdown of the Ethernet
The access to ETH-A7-4I4R over its Web-Interface is very universal. You can design one or more pages with your favourite HTML editor and interlace mSP instructions into these pages. mSP are "mCAT-Server-Pages" instructions that are replaced at the access time by a browser of the mCat webserver by for example the current state value of a digital input. For the relays you have to define buttons or check boxes wherewith the over mSP linked output is switched.
The 4I4R versions of ethernode® and ethernode®LCD respectively can get remote powered by the IEEE802.3af Power-over-Ethernet technologie of course, too. Therefor you only need the corresponding mains adapter.
