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Black Box ME445C-35 - page 1
CUSTOMER SUPPORT INFORMATION Order toll-free in the U.S.: Call 877-877-BBOX (outside U.S. call 724-746-5500 ) FREE technical support 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 Mailing address: Black Box Corporation , 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: info@blackbox.com MARCH 200 ...
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Black Box ME445C-35 - page 2
1 FCC AND IC RFI ST A TEMENTS 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 communic ...
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Black Box ME445C-35 - page 3
2 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Safety W arnings Always observe standard safety precautions during installation, operation, and maintenance of this product. Only qualified and authorized service personnel should adjust, maintain, or repair this instrument. Do not attempt to adjust, maintain, or repair the equipment. T elecommunicati ...
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Black Box ME445C-35 - page 4
3 Declaration of Conformity/Supplementary Information Declaration of Conformity The line driver conforms to the following standard(s) or other normative document(s); EMC: EN 55022 (1994) Limits and methods of measure- ment of radio disturbance characteristics of information technology equipment. EN 50082-1 (1992) Electromagnetic compatibility— Ge ...
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Black Box ME445C-35 - page 5
4 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 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 futu ...
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Black Box ME445C-35 - page 6
5 NOM ST A TEMENT 12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada. 13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde s ...
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Black Box ME445C-35 - page 7
6 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) TRADEMARKS USED IN THIS MANUAL AS/400 and IBM are registered trademarks of International Business Machines Corporation. Any other trademarks mentioned in this manual are acknowledged to be the property of the trademark owners. ...
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Black Box ME445C-35 - page 8
7 CONTENTS Contents Chapter Page 1. Specifications ............................................................................................. 8 2. Introduction ...............................................................................................10 2.1 Physical Description ................................................................ ...
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Black Box ME445C-35 - page 9
8 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 1. Specifications Compliance: FCC Class A, IC Class/classe A Protocol: Synchronous or asynchronous Clock Source: Internal, external (from attached device), or receive clock derived from the receive signal Flow Control: None Operation: 4-wire, full- or half-duplex, point-to-point or multipoint Data Rat ...
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Black Box ME445C-35 - page 10
9 CHAPTER 1: Specifications Maximum Altitude: 8000 ft. (2438.4 m) Enclosure: High-impact plastic Power: ME444A-R3: Directly from outlet through detachable 5-ft. (1.5-m) power cord (included); Optimal input: 115 VAC, 60 Hz; Input ranges: 103.5 to 126.5 VAC, 47 to 63 Hz; Consumption: 5 watts; ME444AE-R3: Directly from outlet through detachable 5-ft. ...
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Black Box ME445C-35 - page 11
10 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 2. Introduction The 256-kbps Line Driver is a short-range modem for synchronous or asynchronous transmission—full- or half-duplex—over unconditioned lines. With a range of up to 11.8 miles (19 km), the line driver operates at user-selectable synchronous data rates from 19.2 to 256 kbps or asynchr ...
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Black Box ME445C-35 - page 12
11 CHAPTER 2: Introduction 2.2 Functional Description This section describes the operation of the line driver’s circuit blocks, primarily the circuits required for correctly configuring the modem (see Figure 2-1 below). Figure 2-1. Line driver block diagram. 2.2.1 E NCODER M ODULATOR The encoder modulator receives data from the DTE, then modulate ...
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Black Box ME445C-35 - page 13
12 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) NOTE In multipoint applications, do not use the 0-msec option for the RTS–CTS delay. 2.2.2 M ODULATION T IMING This circuit supplies the transmit clock to the encoder. Three clock sources are available on the XMT CLK jumper (J3): • INT—Internal clock. From the modem’s internal crystal oscilla ...
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Black Box ME445C-35 - page 14
13 CHAPTER 2: Introduction 2.2.5 V.54 D IAGNOSTICS V.54 loops are activated manually with the front-panel buttons, or through the DTE interface. The buttons and the DTE interface can be enabled or disabled separately by jumpers J7 and J8 (shown in Figure 3-1 and described in Table 3-1). When you use the line driver as a tail-end to a digital networ ...
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Black Box ME445C-35 - page 15
14 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Figure 2-3. T ail-cir cuit application. Figure 2-4. Multipoint application. Sync host Sync host CSU/DSU DDS (56 kbps) External clock 4-wire twisted pair Receive clock CSU/DSU Tail circuit 256-kbps Line Driver 256-kbps Line Driver IBM ® S/3X mainframe V.35 interface V.35 cable 4-wire twisted pair (64 ...
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Black Box ME445C-35 - page 16
15 CHAPTER 3: Configuration 3. Configuration This chapter explains how to configure your standalone or rackmount card line driver. After you configure it, see Chapter 4 for how to install it, Chapter 5 for how to operate it, and Chapter 6 for how to test the system. 3.1 Placement of the Standalone V ersion Place the 256-kbps Line Driver standalone ...
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Black Box ME445C-35 - page 17
16 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) D ESCRIPTION OF THE R ACK N EST 2/14’ S P OWER S UPPLY The 115-VAC RackNest 2/14 (our product code RM110A) uses the PS1000A power supply, which accepts 115-VAC input power. The 230-VAC RackNest 2/14 uses power supply PS1000AE, which accepts 230-VAC input power. Each of these power supplies consists ...
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Black Box ME445C-35 - page 18
17 CHAPTER 3: Configuration 3.3 Configuring the Standalone or Card V ersion Before attaching anything to the 256-kbps Line Driver standalone or rackmount card version, determine which data rate you’re going to use, what the system’s clock source should be, and how you want to set all of the other user-configurable options on the line driver. (R ...
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Black Box ME445C-35 - page 19
18 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 3-1 (continued). User-configurable options. Element Function Possible Standard Settings Factory Setting J4 Select the delay in milliseconds that 0 RTS-CTS occurs during RTS-to-CTS transitions. 9 9 ms DLY jumper Do not select 0 for multipoint applications. 70 J5 Turn V.54 delay ON or OFF. When ...
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Black Box ME445C-35 - page 20
19 CHAPTER 3: Configuration Figure 3-1. Layout of the 256-kbps Line Driver circuit boar d. ...
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Black Box ME445C-35 - page 21
20 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) When you have everything at least tentatively decided, take these steps to set the unit’s internal controls. CAUTION! Disconnect the standalone line driver from the power line before removing it from its housing. W ARNING: HIGH VOL T AGE! Any adjustment, maintenance, and repair of the open instrume ...
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Black Box ME445C-35 - page 22
21 CHAPTER 4: Installation 4. Installation 4.1 Installing the Standalone V ersion in 19-Inch Racks 4.1.1 O VERVIEW The 256-kbps Line Driver standalone version can be installed in 19-inch racks. It is 1U (1.75", 4.4 cm) high and is slightly less than half as wide as the available mounting area. Two rack-adapter kits are available as special quo ...
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Black Box ME445C-35 - page 23
22 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Figure 4-1. Installing a single unit in a 19-inch rack. 4.1.3 I NSTALLING T WO S TANDALONE U NITS IN A 19-I NCH R ACK The adapter kit includes two long side rails (one for each unit), which slide into each other to fasten the units together, and two short side brackets, which hold the two line driver ...
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Black Box ME445C-35 - page 24
23 CHAPTER 4: Installation 4. Secure the included plastic caps to the ends of the rails, to protect the rail ends and prevent the units from moving. 5. You can now use four screws (not supplied with the kit), two on each side, to fasten the assembled units to the side rails of the 19-inch rack. Figure 4-2. Installing two units in a 19-inch rack. ...
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Black Box ME445C-35 - page 25
24 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 4.2 Installing the 256-kbps Line Driver Rackmount Card V ersion T HE R ACK N EST 2/14 I LLUSTRATED You will be installing the line driver card in the RackNest 2/14 as shown in Figure 4-3. The front and rear panels of the RackNest are shown in Figure 4-4; the numbered connectors, controls, and indicat ...
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Black Box ME445C-35 - page 26
25 CHAPTER 4: Installation Figure 4-4. The RackNest 2/14 illustrated. GND RCV XMIT ON 1 7 2 5 3 4 6 ...
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Black Box ME445C-35 - page 27
26 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 4-1. Descriptions of RackNest 2/14 components. Item Control, Indicator , or Connector Function 1 Card Slots Slots for installation of compatible cards (slot no. 1 located at the left-hand side). Unused slots are closed with blank panels. 2 Power-Supply Module Provides power to modules installe ...
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Black Box ME445C-35 - page 28
27 CHAPTER 4: Installation After you install the RackNest 2/14 in your 19" rack (refer to the RackNest’s manual), take these steps to install a line driver card in the RackNest: 1. Insert the card into an empty slot on the RackNest (see Figure 4-3). Do not use excessive force. If the card does not go in easily, remove the card, realign it wi ...
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Black Box ME445C-35 - page 29
28 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 6. Run twisted-pair cable between the local and remote cards. Attach one pair of wires to the corresponding XMT terminals (“TB1”) on the back of the local RackNest and the corresponding RCV terminals on the remote RackNest ; attach the other pair of wires to the RCV terminals on the local RackNes ...
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Black Box ME445C-35 - page 30
29 CHAPTER 4: Installation T able 4-2. Pinout of the RackNest 2/14’s DB25 connector when ME445C-530 is installed or RS-530 standalone’s DB25 connector . SIGNAL ITU-TSS LEAD DB25 NAME (ABBREV.) CIRCUIT TYPE PIN Shield (SHD) 101 1 Signal Ground (SGND) 102 7 Transmitted Data (TD) 103 A 2 B1 4 Received Data (RD) 104 A 3 B1 6 Request to Send (RTS) 1 ...
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Black Box ME445C-35 - page 31
30 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 4-3. Pinout of the RackNest 2/14’s DB25 connector when ME445C-35 is installed. SIGNAL ITU-TSS LEAD DB25 M/34 NAME (ABBREV.) CIRCUIT TYPE (RACK- (NORM. NEST) V.35) PIN PIN Frame (Protective) Ground (FGND) 101 1 A Signal Ground (SGND) 102 7 B Send Data (SD) 103 A 9 P B1 1 S Receive Data (RD) 1 ...
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Black Box ME445C-35 - page 32
31 CHAPTER 4: Installation T able 4-4. Pinout of the V .35 standalone’s M/34 connector . SIGNAL ITU-TSS LEAD V.35 NAME (ABBREV.) CIRCUIT TYPE PIN Frame (Protective) Ground (FGND) 101 A Signal Ground (SGND) 102 B Send Data (SD) 103 A P BS Receive Data (RD) 104 A R BT Request to Send (RTS) 105 C Clear to Send (CTS) 106 D Data Set Ready (DSR) 107 E ...
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Black Box ME445C-35 - page 33
32 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 4-5. Pinout of the RackNest 2/14’s DB25 connector when ME445C-X21 is installed. SIGNAL ITU-TSS LEAD DB25 DA15 NAME (ABBREV.) CIRCUIT TYPE (RACK- (NORM. NEST) X.21) PIN* PIN Shield (n/a) 101 1 1 Ground (G) 102 7 8 a.k.a. Signal Ground (SGND) Transmit (T) 103 A 2 2 B1 4 9 Receive (R) 104 A 3 4 ...
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Black Box ME445C-35 - page 34
33 CHAPTER 4: Installation 4.3 Connecting Data Cables After you set the standalone line driver’s internal controls, it’s ready to be cabled for operation. Its electrical connectors are located on its rear panel. These consist of a female V.35 interface connector labeled “DTE,” a 5-screw terminal block, and an IEC 320 AC inlet that contains ...
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Black Box ME445C-35 - page 35
34 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) fuse rated for the required amount of current. You must avoid using repaired fuses or short-circuiting the fuse holders. The fuse, and one replacement fuse, are located in the top part of the mains connector on the line driver’s rear panel. The nominal current value of the fuse is 0.125 A for 230-V ...
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Black Box ME445C-35 - page 36
35 CHAPTER 4: Installation To connect the line driver to a V.35 DTE or DCE, use an appropriate cable that is pinned correctly (straight-through for DTE, properly crossed for DCE). Run this cable from the other device to the line driver and attach it to the line driver’s interface connector. Your line driver should now be ready for continuous oper ...
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Black Box ME445C-35 - page 37
36 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 5. Operation This chapter contains a list of the controls and indicators and their functions, as well as a brief description of how to operate the unit. Installation procedures must be completed and checked before you attempt to operate the line driver. 5.1 Controls and Indicators The front panel of ...
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Black Box ME445C-35 - page 38
37 Figure 5-2. The front panel of the rackmount car d line driver . T able 5-1. The contr ols. The Item labels in this table correspond to those in Figures 5-1 and 5-2. ITEM CONTROL FUNCTION A DIG Pressing the local digital loopback button causes the local LDM-MR256 to loop received data and clock to its transmitter. Data Set Ready goes low. B ANA ...
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Black Box ME445C-35 - page 39
38 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) T able 5-2. The indicators. The item numbers in this table correspond to Figures 5-1 and 5-2. ITEM INDICATOR FUNCTION 1 PWR Green LED is on when power is on. 2 RTS Yellow LED is on when terminal activates Request to Send. 3 TD Yellow LED is on when steady SPACE is being transmitted. It flickers when ...
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Black Box ME445C-35 - page 40
39 CHAPTER 6: T roubleshooting 6. T roubleshooting This chapter explains system-test and fault-isolation procedures. The line driver provides local loopback and remote digital loopback in compliance with the V.54 standard. Unless you disable them, the unit’s loopback tests can be activated manually from the unit’s front panel, and the local ana ...
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Black Box ME445C-35 - page 41
40 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Figure 6-1. BERT using loops. Figure 6-2. T wo line drivers doing end-to-end BERT . P A TTERN GENERA TOR P A TTERN TESTER ERROR PAT T DEPRESSED P A TTERN GENERA TOR ERROR DEPRESSED (DISCONNECTS EXTERNAL DTE) P A TTERN TESTER RCV DTE XMT PAT T PRESSED P A TTERN GENERA TOR P A TTERN TESTER ERROR RCV XM ...
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Black Box ME445C-35 - page 42
41 6.3 The Modem Self-T est To verify that the line driver itself is operating correctly, initiate the modem self- test by pressing the PATT and ANA buttons (refer to Figure 6-3 below): 1. Press ANA to start local analog loopback. Both the TEST and DCD LEDs should light. If the DCD LED doesn’t light, make sure that the RTS signal is not OFF (low) ...
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Black Box ME445C-35 - page 43
42 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 2. Verify that the DTE is operating properly and can be used for a test. 3. Perform the test using one of these methods: • Send data from the DTE and check the echoed data stream. • Hook up an external Bit Error Rate Test (BERT) unit in place of the DTE. • Use the line driver’s internal BERT. ...
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Black Box ME445C-35 - page 44
43 CHAPTER 6: T roubleshooting 6.5 Remote Digital Loopback Activate the remote digital loopback test by pressing the REM button or by raising the level of the remote loopback signal received by the line driver’s V.35 connector (Pin HH). This test involves creating an outbound loopback at the remote line driver (see Figure 6-5 on the next page). T ...
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Black Box ME445C-35 - page 45
44 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) Figure 6-5. Remote digital loopback. 6.6 Local Digital Loopback Activate the local digital loopback test by pressing the DIG button on the line driver’s front panel. This test involves creating an outbound loopback at the local line driver (see Figure 6-6 on the next page). It works the same way as ...
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Black Box ME445C-35 - page 46
45 CHAPTER 6: T roubleshooting 4. After the test is complete or the fault has been corrected, restore the DIG button to its normal position. Figure 6-6. Local digital loopback. 6.7 Calling Black Box If you determine that your line driver is malfunctioning, do not attempt to alter or repair the unit. It contains no user-serviceable parts. Contact Bl ...
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Black Box ME445C-35 - page 47
46 256-KBPS LINE DRIVER (V .35, RS-530, OR X.21) 6.8 Shipping and Packaging If you need to transport or ship your line driver: • Package it carefully. We recommend that you use the original container. • If you are shipping the line driver for repair, make sure you include its power cord. If you are returning the LDM-MR256, make sure you include ...
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Black Box ME445C-35 - page 48
47 Appendix: Maximum Distances The maximum distance that a pair of line drivers can communicate across will vary depending on the data rate and the thickness (gauge) of the wires. In multipoint applications, it will also vary depending on the number of slaves on the line. Approximate maximum distances for different combinations of these factors are ...
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Black Box ME445C-35 - page 49
1000 Park Drive • Lawrence, PA 15055-1018 • 724-746-5500 • Fax 724-746-0746 © Copyright 2004. Black Box Corporation. All rights reserved. ...
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