Black Box ME800A User Manual download pdf (Page 7)

SHM-B ASYNC

end of the loop. Interface is switch-selectable for

DTE/DCE configuration (pins 2 and 3 are reversed)

Connectors — (1) DB25 female, (1) 5-screw terminal

block

Diagnostics — Loopbacks provided by a front-panel

switch: Analog loopback on a 4-wire loop and digital

loopback on equipment interface (EIA-232)

Status Indication — Two bi-color LEDs indicate the

status of the transmitter and receiver. A green light

indicates a “low” logic level (-3 to -25V) on the EIA-232

interface; a red light indicates a “high” logic level (+3 to

+25V).

Operating Temperature — 32 to 112°F (0 to 50°C)

Humidity — 95%maximum, noncondensing

Enclosure — Standalone: High-impact plastic;

Rackmount: Aluminum alloy

Power — Power is supplied by a wall-mounted power

transformer. No more than 16 Vrms is present in unit.

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Black Box ME800A User Manual Page 7