Aten IC485AI Руководство пользователя онлайн
Содержание
- Fcc information 2
- Sj t 11364 2006 2
- For international online technical support including troubleshooting documentation and software updates http support aten com 3
- For north american technical support 3
- Ic485ai user manual 3
- Online registration 3
- Technical support 3
- Telephone support 3
- Package contents 4
- Features 5
- Overview 5
- Components 6
- Top view 6
- Bottom view 7
- Dip switch configuration 8
- Note 1 the baud rate must be the same for all units on the installation 8
- Note when you change any of the dip switch settings you must reset the device by powering it off then powering it on again 8
- Sw 1 3 baud rate 8
- Sw 4 reserved 8
- The default is 9600 bps 8
- The ic 485ai s settings for baud rate data format and rs 422 rs 485 mode are configured by setting the eight segment dip switch located on its bottom panel 8
- As an rs 422 converter sw8 determines whether the unit is configured for master or slave operation 9
- As an rs 485 converter sw8 determines whether the unit operates in rts control mode or auto send data mode 9
- Note rs 422 is used for 4 wire hookups rs 485 is used for 2 wire hookups 9
- Note the default is 10 bits 1 start 8 data 0 parity 1 stop unless you have a special reason to change this we recommend that you leave it as is if you do change it however all the units on the installation must be changed to match 9
- Operating modes are discussed in detail in the next section and on p 5 9
- Sw 5 6 data format 9
- Sw 7 8 rs 422 rs 485 operating mode 9
- Sw7 determines whether the unit operates as an rs 422 or rs 485 converter 9
- These two switch segments configure the bit settings for start data parity and stop 9
- Operating modes 10
- Point to point 10
- Multidrop 11
- For all ic 485ai units set the unit to dce or dte depending on what type of device the ic 485ai will plug into if it will plug into a dce device configure it for dte and vice versa 13
- For all of the units set sw7 and sw8 according to the table on p to configure each unit s rs 485 operating mode see p 0 for rs 485 operation details 13
- Multidrop half duplex 13
- Multidrop half duplex uses reverse two wire cabling to link all the connected ic 485ai units 13
- Note no more than 31 slave units can be connected 13
- A simplex configuration is one in which more than two devices are linked for communication using several ic 485ai units in a manner similar to multidrop the difference is that in a simplex configuration the master device can only talk and the slave devices can only listen 14
- For all ic 485ai units set the unit to dce or dte depending on what type of device the ic 485ai will plug into if it will plug into a dce device configure it for dte and vice versa 14
- For all of the units master and slave set sw7 on set sw8 on 14
- Note no more than 31 slave units can be connected 14
- Simplex 14
- Simplex uses reverse two wire cabling to link all the connected ic 485ai units as shown in the figure below 14
- A use two or four wire twisted pair cable in a reverse or straight through configuration according to the information provided in the switch configuration and operating modes sections 15
- B see p 7 for the terminal block pin assignments 15
- Installation 15
- Note when the distance between both ends of the installation is large and or the transmitted signals are unstable insert 120 ω terminal resistors between pins 1 and 2 and between pins 3 and 4 on the terminal blocks of the two units at each end of the installation 16
- Note when the distance between both ends of the installation is large and or the transmitted signals aren t stable insert a 120 ω terminal resistor between pins 1 and 2 on the terminal blocks of the two units at each end of the installation 16
- Rs 422 full duplex 16
- Rs 422 rs 485 installation diagrams 16
- Rs 485 half duplex 16
- Appendix 17
- Circuit test 17
- Terminal block pin assignments 17
- In this mode rts is pulled high when the computer makes a request to send data 18
- Rs 485 operation mode flow charts 18
- Rts control mode 18
- The ic 485ai operates in rs 485 rts control mode when both sw7 and sw8 are set to off 18
- Auto send data mode 19
- If the bus line is determined to be idle cts is pulled low and the ic 485ai sends data to the bus line 19
- If the the bus line is busy cts is pulled high and the ic 485ai will not send data to the bus line 19
- In this mode the status of the bus line is auto detected in order to prevent more than one signal on the line 19
- The ic 485ai operaties in rs 485 auto send data mode when sw7 is set to off and sw8 is set to on 19
- Dce dte connection description 20
- Specifications 21
- Limited warranty 22
- Troubleshooting 22
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