Westermo MA-49 Installation Manual

Westermo MA-49 Installation Manual

Converter between rs-232 and rs-422/48

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INSTALLATIONSANVISNING
INSTALLATION MANUAL
INSTALLATIONS ANLEITUNG
6049-2001
Galvanic
Transient
Balanced
CE
Isolation
Protection
Transmission
Approved
Omvandlare RS-232 – RS-422/485
Converter RS-232 – RS-422/485
Wandler RS-232 – RS-422/485
www.westermo.se

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Summary of Contents for Westermo MA-49

  • Page 1 INSTALLATIONSANVISNING INSTALLATION MANUAL INSTALLATIONS ANLEITUNG 6049-2001 Galvanic Transient Balanced Isolation Protection Transmission Approved Omvandlare RS-232 – RS-422/485 Converter RS-232 – RS-422/485 Wandler RS-232 – RS-422/485 www.westermo.se...
  • Page 2: Specifications

    +20 V 70 mA, –20 V 80 mA Temperature range 5–50°C, ambient temperature Humidity 0–95% RH, non-condensing Dimensions 100x100 mm Weight 0.1 kg Mounting To be mounted in rack RV-01, takes one card slot. NOTE! Max 9 MA-49 with one power supply (PS-02) in rack RV-01. 6049-2001...
  • Page 3: Switch Settings

    Switch settings The MA-49 can through different switch settings be adapted to a variety of running conditions. Selection of signal activating 1 – 6 Transmitter controlled controlled activated by 1 2 3 4 5 6 1 – 6 Always high...
  • Page 4 Look right for a section of rack RV-01 with one MA-49 mounted. Terminal connection to a 25-position D-sub (female) connector on MA-49. Line connection to a 5-position detachable screw-terminal, which is mounted on the male connector located at the rear of RV-01.
  • Page 5: Line Connection

    Line connection 4-wire 2-wire RS-422 RS-485 MA-49 MA-49 equipment equipment Twisted pairs A’ Transmitter Receiver B’ Twisted pairs Transmitter/ Transmitter/ Transmitter A’ A/A’ Receiver A/A’ Receiver Receiver B’ B/B’ B/B’ Shield Shield 1) If shielded cable is used, connect the shield only at one end to avoid ground currents.
  • Page 6 See diagrams for details of how this is done with RS-485 (2 wire) and RS-422 (4 wire). On 4 wire systems when the MA-49 is on a slave system, it’s transmitter is linked to the same bus as all the other slave transmitters. A status signal (RTS or DTR) is used to control the MA-49’s transmitter, to ensure only one slave is active on the bus at one...
  • Page 7 OWN COMMENTS ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................6049-2001...
  • Page 8: Block Diagram

    +5VB Power supply 1) 0 Ω resistors R52 is normally not mounted. Westermo Teleindustri AB • SE-640 40 Stora Sundby, Sweden Phone +46 16 42 80 00 Fax +46 16 42 80 01 E-mail: info@westermo.se • Westermo Web site: www.westermo.se...

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