Table of Contents
Related Manuals for Data-Linc Group MDL500/MR
Summary of Contents for Data-Linc Group MDL500/MR
- Page 1 UIDE MDL500/MR MDL500/LR Two-Wire and Four-Wire Private Line FSK Modems Full and Half-Duplex Operation It is essential that all instructions contained in the User Guide are followed precisely to ensure proper operation of equipment.
- Page 2 Product User Guide PN 161-10003-002B DATA-LINC GROUP...
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Page 3: Table Of Contents
Trasmitter Output Level Receiver Gain Carrier Detect Chassis Ground Half-Duplex Operation/Carrier Control Special Instructions MDL500/MR/LR Four-Wire Long Range Transmitter & Receiver Jumpers MDL500/MR/LR Four-Wire Long Range Carrier Signal Connectors Front Panel LEDs General Operating Notes Non-Loaded Transmission Line Loop Back Test... - Page 4 MDL500 User Guide PN 161-10003-002B DATA-LINC GROUP rev 8/03...
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Page 5: Introduction
MDL500 User Guide Introduction The Data-Linc Group MDL500/MR is a two-wire private line modem. The MDL500/MR allows 9600 baud full and half-duplex RS232 data communications over a single dedicated wire pair and across sliding contacts. The MDL500/MR operates using pure Frequency Shift Key (FSK) at high carrier frequencies (100 KHz, 106.5 KHz to 150 KHz, 156.5 KHz) making the MDL500/MR particularly immune to cross-talk and outside noise interference. -
Page 6: Power Source
Settings.) Prior to installation, it is important to ensure that the digital devices to be connected to the MDL500/MR units are capable of communicating with each other as if connected with a conventional three-wire RS232 data cable. Once this has been established, the devices can be connected to the MDL500/MR units and RS232 data communications will take place transparently. -
Page 7: Field Configuration Procedure
When properly configured, the MDL500 is capable of half or full-duplex data transmission at rates up to 9600 baud. MDL’s require no settings for data rate and will operate transparently as data is fed to them. They will begin communicating data as soon as connections are made and they are powered up. PN 161-10003-002B DATA-LINC GROUP rev 8/03... -
Page 8: Jumper Settings
The low gain setting should be used on the receiver whenever the high power transmitter option is selected on the transmitter to avoid onboard cross-talk. PN 161-10003-002B DATA-LINC GROUP rev 8/03... -
Page 9: Carrier Detect
(setting A-B). The Master unit’s carrier is left on all the time (setting B-C). (There is no interference since the Master and Remote carrier frequencies are different.) The factory setting for both MDL Masters and Remotes is P4, B-C, for full or half-duplex, point-to-point operation. PN 161-10003-002B DATA-LINC GROUP rev 8/03... -
Page 10: Special Instructions
Remote MDL500/MR’s and OFF on the Master MDL500/MR. (The Master CD LED will blink during operation as each Remote MDL500/MR turns on its carrier to answer back to the Master). If the correct CD LED’s are not ON, a carrier cable problem is likely. -
Page 11: General Operating Notes
A jumper wire (a bent paper clip works very well) is placed between pin sockets 2 and 3 of the DB25 on the other MDL500/MR. Data sent to the first MDL500/MR will be looped back from the second and appear on the PC screen. If the characters are correct, the MDL500/MR’s are functioning. -
Page 12: Technical Specifications
; e l t n I t i s i t i i r r , t c " 5 " 5 " 5 l l a ; l e . t n PN 161-10003-002B DATA-LINC GROUP rev 8/03... -
Page 13: Technical Support
Data-Linc Group warrants equipment of its own manufacture to be free from defects in material and workmanship for one year from date of shipment to original user. Data-Linc Group will replace or repair, at our option, any part found to be defective. -
Page 14: Appendix A
MDL500 User Guide Appendix A Diagrams Diagram 1 Drawing of the two-wire MDL500/MR enclosure depicting the location of connectors and LEDs. MDL500 MDL500 front RS-232 +24 VDC MDL500 rear Diagram 2 Schematic of the RS232 port with pin functions and pinout. - Page 15 MDL500 User Guide Diagram 3 Illustration of a typical full-duplex and half-duplex, multi-drop application connections. Diagram 4 MDL500/MR two-wire board layout illustrating Jumper settings and test points. (Not to scale.) PN 161-10003-002B DATA-LINC GROUP rev 8/03...