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(0.8 kg) ME790A-M 5 of 6 5/2/2007 #11220 Special circuitry within the driver lets it work with any DTE that can be polled, regardless of the DTE’s RTS support, so you get total compatibility with your DTE hardware. The RS-232/RS-485 Multipoint Line Driver can be jumpered for a user-selectable port timeout. After the last character is sent from one of the ports and a specified period of time passes, the line driver disables any transmission from that port. This way, a single port won’t monopolize your network. 724-746-5500 blackbox.com You can order the RS-232/RS-485 Multipoint Line Driver in standalone 115-VAC (ME836A-R5), standalone 230-VAC (ME836AE-R3), and rackmount card (ME836C-R5) versions. Cables are included with the 115-VAC standalone model and the rackmount card model. TECH SPECS All Models: Protocol: Asynchronous Microdriver 9 (ME790A-M, ME790A-F, ME792A-MSP, ME792A-FSP, ME794A-M, ME1794A-F, ME1791A-F) Distance (Maximum) — 24 AWG: 17 mi. (27.4 km) at 1200 bps Operation — 4-wire full-duplex, point-to-point Speed (Maximum) — 19.2 kbps Interface — RS-232 Connectors — ME790A-M, ME792A-MSP: (1) DB9 M, (1) RJ-11 F; ME790A-F, ME792A-FSP: (1) DB9 F, (1) RJ-11 F; ME794A-M: (1) DB9 M, (1) RJ-45 F; ME1794A-F: (1) DB9 F, (1) RJ-45 F; ME1791A-F: (1) DB9 F, (1) 5-screw terminal block Power — From the RS-232 interface Size — 1.2"H x 0.75"W x 2.5"D (3 x 1.9 x 6.4 cm) Weight — 0.6 lb. (0.3 kg) SHM-B 2W-A (ME755A, ME755AE, ME755-C) Distance (Maximum) — 24 AWG: 2.3 mi. (3.7 km) at 2400 bps Operation — 2-wire full-duplex, point-to-point Speed (Maximum) — 19.2 kbps Interface — RS-232 Connectors — (1) DB25 F, (1) 2-screw terminal block Power — ME755A: External 115 VAC, 60 Hz; ME755AE: External 230 VAC, 50 Hz; ME755-C: From the ME810 or RM007 rack Size — Standalone: 1.5"H x 4.3"W x 4.5"D (3.8 x 10.9 x 11.4 cm) Weight — Standalone: 1.3 lb. (0.6 kg) SHM-B Async (ME800A, ME800A-R3, ME800AE-CABPAK, ME805-C, ME805C-R3) Distance (Maximum) — 24 AWG: 4 mi. (6.4 km) at 2400 bps Operation — 4-wire full-duplex, point-to-point Speed (Maximum) — 19.2 kbps Interface — RS-232 Connectors — (1) DB25 F, (1) 4-screw terminal block Power — ME800A, ME800A-R3: External 115 VAC, 60 Hz ± 10%, 5 watts; ME800AE-CABPAK: Primary: 230 VAC ±10%, 50–60 Hz; Secondary: 17 VAC, 700 mA; ME805-C, ME805C-R3: From the ME810 or RM007 rack Size — Standalone: 1.5"H x 4.3"W x 4.5"D (3.8 x 10.9 x 11.4 cm) Weight — Standalone: 1.3 lb. (0.6 kg) High-Speed SHM-B Async (ME802A, ME802A-R3, ME802C) Distance (Maximum) — 24 AWG: 4 mi. (6.4 km) at 2400 bps Operation — 4-wire full-duplex, point-to-point Speed (Maximum) — 115.2 kbps Interface — RS-232 Connectors — (1) DB25 F, (1) 4-screw terminal block Power — ME802A, ME802A-R3: External 115 VAC, 60 Hz; ME802C: From the ME810 or RM007 rack Size — Standalone: 1.5"H x 4.4"W x 4.1"D (3.8 x 11.2 x 10.4 cm) Weight — Standalone: 2 lb. (0.9 kg) RS-232/RS-485 Multipoint Line Driver (ME836A-R5, ME836AE-R3, ME836C-R5) Distance (Maximum) — 24 AWG: 4 mi. (6.4 km) at 1200 bps Operation — 4-wire full-duplex, 2-wire half-duplex, point-to-point or multipoint Speed (Maximum) — 64 kbps Interface — RS-232 or RS-485 Connectors — (1) DB25 F, (1) 4-screw terminal block (RS-485) Power — ME836A-R5: External 115 VAC, 60 Hz; ME836AE-R3: External 230 VAC, 50 Hz; ME836C-R5: From the RM005 rack Size — Standalone: 1.8"H x 5.5"W x 8.5"D (4.6 x 14 x 21.6 cm) Weight — Standalone: 1.8 lb. (0.8 kg) ME790A-M 6 of 6 5/2/2007 #11220 724-746-5500 blackbox.com Item Powered/ Multipoint 2-wire 4-wire Full Half-To To To Power Nonpowered or duplex duplex 19.2 64 115.2 5-wire* kbps kbps kbps ME790A-M, Nonpowered . . . RS-232 interface, DCE mode: Pins 3, 4, 7 790A-F ME792A-MSP, Nonpowered . . . . RS-232 interface, DCE mode: Pins 3, 4, 7 792A-FSP ME794A-M, Nonpowered . . . . RS-232 interface, DCE mode: Pins 3, 4, 7 1794A-F ME1791A-F Nonpowered . . . . RS-232 interface, DCE mode: Pins 3, 4, 7 ME755A Powered . . . 115 VAC, 60 Hz ME755AE Powered . . . 230 VAC, 50 Hz ME755-C Powered . . . From the ME810 or RM007 rack ME800A, 800A-R3 Powered . . . 115 VAC, 60 Hz ME800AE-CABPAK Powered . . . 230 VAC, 50 Hz ME805-C, 805C-R3 Powered . . . From the ME810 or RM007 rack ME802A, 802A-R3 Powered . . . . . 115 VAC, 60 Hz ME802C Powered . . . . . From the ME810 or RM007 rack ME836A-R5 Powered . . . . . . . 115 VAC, 60 Hz ME836AE-R3 Powered . . . . . . . 230 VAC, 50 Hz ME836C-R5 Powered . . . . . . . From the RM005 rack *Models with 5-wire terminal blocks use one wire for ground. Quick Reference Guide Item Code Microdriver 9 RJ-11 Male ME790A-M Female ME790A-F Microdriver 9 RJ-11 with Surge Protection Male ME792A-MSP Female ME792A-FSP Microdriver 9 RJ-45 Male ME794A-M Female ME1794A-F Microdriver 9 5-Screw Terminal Block Female ME1791A-F Short-Haul Modem-B (SHM-B) 2W-A Standalone (115-VAC) ME755A Standalone (230-VAC) ME755AE Rackmount Card ME755-C Short-Haul Modem-B (SHM-B) Async Standalone (115-VAC) ME800A Standalone (115-VAC) with Cables ME800A-R3 (ME800A-R3 includes [1] power suppl...

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