HYDAC CMU 1000 - Manual (Page 29)

Condition Monitoring Unit CMU 1000 Page 29
Revised 17.12.2009 HYDAC ELECTRONIC GMBH Mat.-No.: 669749
5.2.2 Direct Connection via HSI Bus
You can connect several HYDAC CM devices with one another (maximum of 26
devices) via the so-called "HSI Bus". Each CM device must be assigned an HSI
Bus address for this purpose (see Chap. 5.2.5.7).
This kind of bus setup is presented below, using as an example three CMU 1000
devices. Other HYDAC CM devices such as SMART sensors (e.g. HYDACLab
® ,
CS 1000) or CSI modules can however also be linked in random sequence and
configuration in one HSI Bus.
Caution!
If you connect devices with one another that do not have the same reference
voltage, this can cause unwanted currents in the HSI connection cable.
These unwanted currents can lead to communication errors or property damage in
the devices.
Make sure that all of the devices that you connect with one another via HSI Bus
either have the same reference wire in the electricity circuit or are electrically
disconnected, so that no unwanted currents can arise.
5.2.2.1 Device Connection via CSI-B-2 Interface Module
• Connect the serial interface of your PC (RS232 or RS485) with the 9-pin SUB-D
socket of the HYDAC interface module CSI-B-2 via a corresponding data cable
(interface module and data cable are not included in the scope of delivery for
the CMU 1000).
• Connect all of the devices via the "HSI Master" connection.
(-X2/Pin 3 on the CSI-B-2 and -X5/Pin 1 on the CMU 1000)
• Switch on the voltage supplies for all of the connected devices.
RS232 /
RS485
Adresse a Adresse c Adresse d