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Black Box SHM-FSK, Manual

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CUSTOMER

SUPPORT

INFORMATION

Order 

toll-free

in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 

877-877-BBOX

FREE technical support, 24 hours a day, 7 days a week: Call 

724-746-5500

or fax 

724-746-0746

Mail order:  

Black Box Corporation

, 1000 Park Drive, Lawrence, PA 15055-1018

Web site: 

www.blackbox.com

•   E-mail: 

[email protected]

AUGUST 1997

ME840A-M

ME840A-S

MD3317
MD3318

Short-Haul Modem-FSK

RS-485 Modules

CD

SHM-FSK

RxD

TxD

LPBK

PWR

R

R

Summary of Contents for SHM-FSK

Page 1: ...chnical support 24 hours a day 7 days a week Call 724 746 5500 or fax 724 746 0746 Mail order Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbo...

Page 2: ...operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measu...

Page 3: ...camente con carritos o pedestales que sean recomendados por el fabricante 7 El aparato el ctrico debe ser montado a la pared o al techo s lo como sea recomendado por el fabricante 8 Servicio El usuari...

Page 4: ...iado nicamente de acuerdo a las recomendaciones del fabricante 15 En caso de existir una antena externa deber ser localizada lejos de las lineas de energia 16 El cable de corriente deber ser desconect...

Page 5: ...6 SHORT HAUL MODEM SHM FSK TRADEMARKS All applied for and registered trademarks are the property of their respective owners...

Page 6: ...llation 13 4 Operation 15 5 Jumper Settings 16 5 1 DCE and DTE Settings 16 5 2 Transmitter Output Level 16 5 3 Receiver Gain 17 5 4 Carrier Detect 17 5 5 Chassis Ground 17 5 6 Half Duplex Operation Ca...

Page 7: ...0 feet 9 1 miles or 14 6 km on single twisted pair Operating Temperature 32 to 140 F 0 to 60 C Enclosure All metal enclosure 16 gauge steel polyurethane paint Interface DTE DCE jumper selectable Femal...

Page 8: ...igured as either Master or Remote units and can be used for either point to point or multi drop data communications The SHM FSKs send data asynchronously They are transparent to protocol and to data r...

Page 9: ...intelligent device it is connected to The Master unit s transmitter remains on all the time The green two position pluggable terminal block at the receptacle marked LINE on the back of the SHM FSK un...

Page 10: ...REQUEST TO SEND DATA TERMINAL READY SIGNAL QUALITY DETECTOR RING INDICATOR DATA SIGNAL RATE SELECTOR DTE TRANSMITTER SIGNAL ELEMENT TIMING TEST MODE PROTECTIVE GROUND TRANSMITTED DATA RECEIVED DATA R...

Page 11: ...f a typical full duplex or half duplex point to point application Figure 2 3 Typical Application Connections Programmable Logic Controller PLC SHM FSK SHM FSK Remote Telemetry Unit RS 232 Cable RS 232...

Page 12: ...units and RS 232 data communications will take place transparently NOTE Make sure that the wire pair to be used for data communications between SHM FSK units is connected only to those units has no b...

Page 13: ...ith an appropriate cable 6 Connect the transmission line to the unit at the green pluggable terminal block There is no polarity requirement 7 Connect the unit s power cord at the black two position pl...

Page 14: ...nt device that a Remote SHM FSK is connected to PC PLC or RTU is used to control the the SHM FSK s transmitted carrier When logic is low the carrier is turned off when logic is high the carrier is tur...

Page 15: ...re located directly behind the DB25 RS 232 connector on the rear panel 5 2 Transmitter Output Level The SHM FSK allows the selection of either normal or high power HP transmitter output The high power...

Page 16: ...ing screws as desired to avoid a possible shock hazard 5 6 Half Duplex Operation Carrier Control The SHM FSK can be operated in multi drop half duplex mode by controlling the transmitter s carrier on...

Page 17: ...is Carrier Detect In full duplex mode the CD LED must be ON on both units in half duplex carrier control mode with RS 232 cables connected the CD LED will be ON on all Remote SHMs and OFF on the Maste...

Page 18: ...n line be non loaded free from inductors and capacitors on the line The presence of inductors capacitors or excessive resistance from bad connections for example or shorts between the wires can seriou...

Page 19: ...onal CAUTION Do not connect anything except an RS 485 signal to positions 12 and 13 on the DB25 or damage to the circuit could occur The AE 485 Auto Enable circuit contains a special feature that elim...

Page 20: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1997 Black Box Corporation All rights reserved...

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