Campbell Scientific MD485 RS-485 Multidrop Interface - Manual (Page 3)

MD485 Table of Contents
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1. Introduction..................................................................1
2. Specifications ..............................................................1
3. System Components ...................................................2
3.1 MD485 RS-485 Multidrop Interface ........................................................2
3.1.1 Ground Lug.....................................................................................2
3.1.2 Indicator LEDs................................................................................2
3.1.3 Configuring the MD485..................................................................3
3.2 Power Supplies .........................................................................................4
3.3 RS-485 Cable............................................................................................4
3.4 Serial Cables .............................................................................................5
4. Quick Start....................................................................5
5. System Configuration .................................................8
5.1 Transparent Communication.....................................................................9
5.2 MD9 Emulation ......................................................................................11
5.3 PakBus Networking................................................................................12
6. Combining with Other Devices.................................12
7. Call-back.....................................................................13
8. Wiring Specifications ................................................13
8.1 RS-485 Line Length ...............................................................................13
8.2 Grounding...............................................................................................13
8.3 Protection and Isolation ..........................................................................14
8.4 Termination ............................................................................................14
8.5 Summary.................................................................................................14
A. Phone to MD485 Network ....................................... A-1
B. RF401 to MD485 Network ....................................... B-1
B.1 Connection using a PS100 with A100 .................................................B-1
B.2 Connection using a Null Modem Cable ...............................................B-4
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