Manuale d’uso / di manutenzione del prodotto ME840A-M del fabbricante Black Box
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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.
3 FCC ST A TEMENT FEDERAL COMMUNICA TIONS COMMISSION AND INDUSTR Y CANADA RADIO FREQUENCY INTERFERENCE ST A TEMENTS This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication.
4 INSTRUCCIONES DE SEGURIDAD NORMAS OFICIALES MEXICANAS (NOM) ELECTRICAL SAFETY ST A TEMENT INSTRUCCIONES DE SEGURIDAD 1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea operado. 2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
5 INSTRUCCIONES DE SEGURIDAD 11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación, o como se indique en el aparato. 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.
6 SHOR T HAUL MODEM (SHM-FSK) TRADEMARKS All applied-for and registered trademarks are the property of their respective owners..
7 SHOR T HAUL MODEM (SHM-FSK) CONTENTS 1. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 SHOR T HAUL MODEM (SHM-FSK) 1. Specifications Data Format — RS-232C (RS-422/485 optional) Operation — Full-duplex or half-duplex controlled carrier, serial asynchronous data Mode — Point-to-po.
9 SHOR T HAUL MODEM (SHM-FSK) 2. Introduction The Short Haul Modem (SHM-FSK) is a private-line modem that allows half- and full-duplex RS-232 data communications at 9600 bps over a single dedicated wire pair and across sliding contacts. The SHM-FSK operates using pure Frequency Shift Key (FSK) at high carrier frequencies (100KHz, 106.
10 SHOR T HAUL MODEM (SHM-FSK) 2.3 Operating Mode The SHM-FSKs can be operated in either point-to-point or multipoint polling mode. For multi-drop data communications, the SHM-FSK can be operated with one Master and typically up to eight Remote units.
11 SHOR T HAUL MODEM (SHM-FSK) Figure 2-2 is a pinout of the RS-232 port. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 SECONDARY TRANSMITTED DA T A DCE TRANSMITTER SIGNAL ELEMENT .
12 SHOR T HAUL MODEM (SHM-FSK) Figure 2-3 is an illustration of a typical full-duplex or half-duplex, point-to-point application. Figure 2-3. T ypical Application Connections. Programmable Logic Controller (PLC) SHM-FSK SHM-FSK Remote Telemetry Unit RS-232 Cable RS-232 Cable Copper Pairs up to 48,000 feet (9.
13 SHOR T HAUL MODEM (SHM-FSK) 3. Installation The SHM-FSK units are shipped ready for either full-duplex or half-duplex multi-drop operation. The jumpers have been factory-set in full-duplex mode.
14 SHOR T HAUL MODEM (SHM-FSK) 3. Confirm that the jumpers on positions P1 and P2 are in the B-C position. 4. Replace the cover. 5. Connect the RS-232 communications port of the digital data device (PC, PLC, etc.) to the SHM-FSK unit with an appropriate cable.
15 SHOR T HAUL MODEM (SHM-FSK) 4. Operation Point-to-point, full- or half-duplex operation is usually conducted with the both the Master and Remote SHM-FSK carriers on all the time.
16 SHOR T HAUL MODEM (SHM-FSK) 5. Jumper Settings There are several configuration options that can be selected by jumpers as described below. The jumper pins are internal and are identified by lettering on the circuit board. They are accessed by removing the four retaining screws on the top cover of the enclosure and removing the cover.
17 SHOR T HAUL MODEM (SHM-FSK) 5.3 Receiver Gain The SHM-FSK incorporates a receiver amplifier on the circuit board. This amplifier has low, normal, and high gain settings configured by a “T” shaped pin block near the center of the circuit board with pins marked “G1/H,” “G2,” “G3/L,” and “N” (the leg of the “T”).
18 SHOR T HAUL MODEM (SHM-FSK) 6. LED Indications There are four LEDs on the front panel of the SHM-FSK. From left to right they are: Marking Function CD Carrier Detect RX Data flowing out of the SHM’s RS-232 port TX Data flowing into the SHM’s RS-232 port PWR Power connected The first diagnostic LED is Carrier Detect.
19 SHOR T HAUL MODEM (SHM-FSK) 7. General Operating Notes 7.1 T uned Circuits The SHM-FSK uses tuned circuits to achieve its high performance. These circuits have been carefully adjusted at the factory to operate over several miles of transmission line.
20 SHOR T HAUL MODEM (SHM-FSK) 8. RS-485 Inter face Optional RS-485 modules are available for connection to multiple remote devices. The following modules are available: • RS-485 Module 2-Wire, part.
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 1997. Black Box Corporation. All rights reserved..
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Black Box ME840A-M è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Black Box ME840A-M - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Black Box ME840A-M imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Black Box ME840A-M ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Black Box ME840A-M, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Black Box ME840A-M.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Black Box ME840A-M. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Black Box ME840A-M insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.