AC2220 - Electronic module IFM - Free user manual and instructions

USER MANUAL AC2220 IFM

• Conversion of measured values for 4 channels: 480ms

• The actuators are connected via Combicon connectors (accessories, e.g. E70230)

• Connection of 2-wire / 4-wire sensors possible

LEDs addressing plug Combicon connector with screw termials (optional)Addressing Assign a free address between 1 and 31. The address set at the factory is 0. Address the slave using the AC1144 addressing unit. When mounted and wired the module can be addressed with the addressing cable (E70213) via the implemented addressing interface. No addressing via the addressing socket while live. PAGE 9

• FE functional earth *) only for 4-wire Pt100 A+ AS-i + A- AS-i - LEDs I1
• I4 yellow Status analogue inputs 1 p. 4
• LED green AS-i voltage LED red FAULTElectrical connection Connection of a 2-wire Pt100 element to the AS-i module The 1+ p. 4
• + terminals are intercon- nected in the module. Connection of a 4-wire Pt100 element to the AS-i module 4-wire Pt100 sensors supply more exact results than 2-wire sensors provided that the wire resistance is the same. The changeover between 2 and 4- wire sensors is made via the para- meter bit P3. The 1+ p. 4
• + terminals are intercon- nected in the module. It is necessary to connect at least one Pt100 sensor before switching on the AS-i slave to start the A/D converter, otherwise the LEDs I1 to I4 flash at a frequency of about 5Hz. Important notes regarding Pt100 measurements: In the Pt100 measurement principle, very low currents flow in the mea- suring electronics. It must be ensured that additional resistance (cables, contact and transition resistance, loose contacts, etc.) is avoided in the measuring circuit. Only this way is a precise measurement, for which these modules are designed, possible. PAGE 10 1+ + p. 4

AS-i module Pt100 element AS-i module Pt100 elementIn detail: A 4-wire measurement always has to be preferred over a 2-wire mea- surement. In 2-wire measurement all transition and connection resistances add up and may massively falsify the measurement result. Therefore a 2-wire measurement is not recommended! Parameter setting of the analogue modules Activation of the periphery fault message of the channels 1 to 4 According to the table above the parameter bits P1 and P2 are used to define which measuring channels can trigger a periphery fault message. But irrespective of the defined parameters all 4 channels are always transferred via the AS-Interface. PAGE 11 Parameter bit/ Designation Description Comments

selection Pt100 elements 2-wire mode 4-wire mode

filter 50Hz filter in the A/D converter active 60Hz filter in the A/D converter active The 50Hz filter applies to the whole of Europe

Periphery fault can be triggered by

on off off off on on off off on on on off on on on on

0Operation Check the safe functioning of the unit. Display by LEDs:

• LED yellow I1 ... I4 off: not connected on: analogue signal in the measu- ring range flashing: analogue signal outside the measuring range