Black Box ME745A-M-R2, Specifications, Page: 2 / 2

2
Protocol: Asynchronous
Operation: 2- or 4-wire, half- or full
duplex
Multipoint: 50 drops
Maximum Speed/Distance:
ME771A–773A series: 115.2 kbps
up to 3 miles (4.8 km);
ME745A series: 38.4 kbps up to
9.4 miles (15.1 km) using
19 AWG cable or 4.4 miles
(7.1 km) using 24 AWG cable
Surge Protection:
All models except
ME745A series: 600 watts per
wire
User Controls: (4) internal straps
Interface: EIA RS-232/CCITT V.24,
DCE
Connectors: ME745A-M-R2,
ME771A-MSP-R2: (1) DB25 male,
(1) 5-screw terminal block;
ME745A-F-R2, ME771A-FSP-R2:
(1) DB25 female, (1) 5-screw
terminal block;
ME772A-FSP-R2: (1) DB25
female, (1) RJ-11 female;
ME773A-MSP-R2: (1) DB25 male,
(1) RJ-45 female;
ME773A-FSP-R2: (1) DB25
female, (1) RJ-45 female
Power: 6 VDC from the RS-232
interface;
ME745A-M-R2, ME745A-F-R2:
Pins 2, 4, 20;
All other models:
DTE Mode: Pins 3, 5, 6, 8, 9;
DCE Mode: Pins 2, 4, 9, 20
Size: ME745A-M-R2, ME745A-F-R2,
ME771A-MSP-R2, ME771A-FSP-
R2: 4.3"H x 2.1"W x 0.9"D
(10.9 x 5.3 x 2.3 cm);
ME772A-FSP-R2, ME773A-MSP-
R2, ME773A-FSP-R2:
2.7"H x 2.1"W x 0.7"D
(6.9 x 5.3 x 1.8 cm)
Weight: 0.2 lb. (0.1 kg)
Specifications
Ordering Information
ITEM CODE
Multipoint Mini Driver (Mini Driver MP)
Mini Driver MP/5-Screw Terminal Block
Male ......................................................ME745A-M-R2
Female ....................................................ME745A-F-R2
with Surge Protection
Male .................................................ME771A-MSP-R2
Female ...............................................ME771A-FSP-R2
Mini Driver MP/RJ-11
with Surge Protection
Female ...............................................ME772A-FSP-R2
Mini Driver MP/RJ-45
with Surge Protection
Male .................................................ME773A-MSP-R2
Female...............................................ME773A-FSP-R2
A two-line configuration is shown at
right (“LOW” and “HIGH” are
receive-impedance settings).
LOW Mini
Driver MP
Terminals connected to
HIGH Mini Drivers MP
HIGH Mini
Driver MP
LOW Mini
Driver MP
LOW Mini
Driver MP
Computer
with async
comm port