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TIONS

It is essential that all instructions contained in the User Guide are followed precisely to ensure proper operation of equipment.

Two-Wire and Four-Wire
Private Line FSK Modems
Full and Half-Duplex Operation

MDL500/MR
MDL500/LR

Summary of Contents for MDL500/MR

Page 1: ...ICATIONS It is essential that all instructions contained in the User Guide are followed precisely to ensure proper operation of equipment Two Wire and Four Wire Private Line FSK Modems Full and Half D...

Page 2: ...DATA LINC GROUP PN 161 10003 002B Product User Guide...

Page 3: ...smitter Output Level 6 Receiver Gain 6 Carrier Detect 7 Chassis Ground 7 Half Duplex Operation Carrier Control 7 Special Instructions 8 MDL500 MR LR Four Wire Long Range Transmitter Receiver Jumpers 8...

Page 4: ...DATA LINC GROUP 2 PN 161 10003 002B rev 8 03 MDL500 User Guide...

Page 5: ...transmitter to carrier signals having two slightly different frequencies which are identified by the receiver and reconverted to the digital signals The MDL500s are either Master or Remote units and...

Page 6: ...L500 MR LR Four Wire Special Instructions Installation The MDL500 factory configuration is set for full or half duplex point to point operation with P4 in the B C position The Master and Remote units...

Page 7: ...ansformer into a convenient 120VAC outlet Plugging the power in will power up the units there is no On Off switch Operation Point to point full or half duplex operation is usually conducted with the b...

Page 8: ...al or High Power HP transmitter output The High Power output has six times greater peak to peak transmitted signal and provides correspondingly greater signal to noise ratio High Power transmitter ope...

Page 9: ...most common external carrier control signal is through the RS232 port RTS line pin 4 Jumper P4 A B selects this line When an external RTS logic high is asserted the MDL carrier is turned on and a log...

Page 10: ...carrier Facing the connectors the pluggable terminal block on the left is the transmitted carrier and the pluggable terminal block on the right is the received carrier For proper operation both modems...

Page 11: ...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 ch...

Page 12: ...e c n a t s i D r i a p d e t s i w t e l g n i s n o t e e f 0 0 0 8 4 o t p U e r u t a r e p m e T g n i t a r e p O 2 3 0 0 4 1 0 0 F 0 0 6 0 C s t n e m e r i u q e R r e w o P C D V 4 2 e c a f...

Page 13: ...al 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 Buyer must return any part claimed defective...

Page 14: ...Assignment Description Signal Direction 1 Protective Ground Computer modem 2 Receive Data Computer modem 3 Transmit Data Computer modem 4 Request to Send Computer modem 5 Clear to Send Not connected...

Page 15: ...Guide PN 161 10003 002B rev 8 03 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 settin...

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