Black Box ME805-C-R2, Short-Haul Modem B, ME810, ME800A-R2 manual Installation, Four-Wire Connections

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SHM-B ASYNC

3. Installation

Installation involves three basic steps: four-wire connections; EIA-232 connection; switch settings.

3.1 Four-Wire Connections

Figure 1 shows the location of the terminal block on the circuit board. Refer to Figure 2 to make the proper connections between two SHM-B units.

NOTE: Transmit + (TX+) on one modem is wired to Receive + (RX+) on the other modem; Transmit - (TX-) is wired to Receive - (RX-). A ground connection is optional.

1.If the unit is assembled, separate the top and bottom panels at the front of the unit.

2.Push the rear connector to force out the front panel and printed circuit board.

3.Route the four-wire cable through the open hole in the rear panel of the enclosure.

4.Strip each of the four wires about 1⁄8".

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Contents Short-Haul Modem B SHM-B Async SHM-B Async SHM-B Async SHM-B Async Trademarks Used in this Manual Specifications Distance miles/kmOperating Temperature 32 to 112F 0 to 50C SHM-B Async Introduction Installation Four-Wire ConnectionsSHM-B board 5-screw terminal block Wiring diagram for two SHM-B units EIA-232 ConnectionSwitch Settings EIA-232 Pin Connections on SHM-BPinning with DTE/DCE switch in the DCE position Flow Control ON/X-OFF Mode Activating the Loopback switch OperationSHM-B Async Rackmount Installation SHM-B Async Troubleshooting Guide SHM-B Async SHM-B Async SHM-B Async SHM-B Async SHM-B Async Copyright 2000. Black Box Corporation. All rights reserved
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