Akytec MU110-8I Manual del usuario - Página 3

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Description

1.1

Functions

MU110-8I is an extension module with 8 analog outputs.

The module provides following functions:

–

module control and parametrization via RS485 network

–

RS485 Network diagnostics

–

error and alarm signal generation

–

Slave in the RS485 network.

The module can be configured with the 'M110 Configurator' software (on CD included)

using a RS485-USB interface adapter (not included). The latest version of the configura-

tion software is available for download on www.akytec.de.

1.2

RS485 network

The I/O modules of Mx110 series use the common standard RS485 for data exchange.

The serial interface RS485 enables communication via two-wired line in half-duplex

mode. The module supports the Modbus RTU and Modbus ASCII protocols with automat-

ic protocol detection.

The network consists of a Master device and can contain up to 32 Slave devices. The

maximum length is 1200 m. The number of slave devices and network length can be

increased using RS485 interface repeater.

Separate devices are connected to a network according to linear (bus) topology. It means

that the line goes from the first device to the second one, from the second one to the third

one, etc. Star connections and spur lines are not allowed.

Line reflections always occur at the open bus ends (the first and the last node). The high-

er the chosen data transmission rate, the stronger they are. A terminating resistor is

needed to minimize reflections. Experience proves that the most efficient practice is to

use terminating resistors of 150 ohm.

The modules can be used as slave devices only. Master device can be PLC, PC with

SCADA software or control panel.

1.3

Design

–

Enclosure

–

Terminal blocks

–

LED "POWER"

–

LED "RS-485"

–

LED "FAULT"

Dimensional drawings are given in App. A.

There are three jumpers under the front cover (see Fig. 4.1):

X2 − restore factory settings (see 7)

–

X3 − service function

–

X1 − DRAM write-protection (see 4.1.1)

–

All jumpers are in OFF position by default.

akYtec GmbH · Vahrenwalder Str. 269 A · 30179 Hannover · Germany Tel.: +49 (0) 511 16 59 672-0 · www.akytec.de

plastic, grey, for DIN-rail or wall mounting

2 plug-in terminal blocks with 24 screw terminals

power supply indicator

flashes at data exchange via RS485 interface

lit when data exchange via RS485 interface is interrupted