Black Box SHM-NPR, User Manual

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CHAPTER 1: Specifications
1. Specifications
Cable Required — 4-wire unloaded twisted pair with DC continuity
(not included)
Compliance — FCC Class A, IC Class/classe A
Interfaces — Device side: Serial EIA RS-232-C, DTE or DCE
(user-selectable, default DCE);
Line side: Proprietary balanced 4-wire
Protocol — Asynchronous
Data Format — Transparent to data format
Flow Control — Does not support hardware flow control
(uses RS-232 control leads as power sources);
transparent to software flow control
Operation — 4-wire full duplex
Data Rate — Up to 19,200 bps
Maximum
Distance—
Up to 17 mi. (27.3 km) depending on cable gauge
and data rate; see Appendix B
User Controls — (1) Top-mounted DCE/DTE slide switch
Indicators — None
Connectors — ME721A-M, ME821A-M models: (1) Front-mounted
DB25 male;
ME721A-F, ME821A-F models: (1) Front-mounted DB25
female;
ME721 models: (1) Internal 5-screw terminal block with
strain relief;
ME821 models: (1) Rear-mounted RJ-12 (“6-wire RJ-11”)
female