MIU202T
Bell 202T continues to be the standard of choices in many utility and industrial multi-drop data communications applications. The Data Connect Enterprise MIU202T can be powered from a wide range of DC and AC voltages, is surge protected on both the power and analog lines, and will operate in extreme heat and cold. Ideal for multi-drop applications over leased lines and private lines.
The MIU202T is a Bell Standard 202T modem designed for asynchronous operation at 0 to 1200 bps over voice grade lines and pilot wires. The modem is intended for use on leased lines and private lines and provides half-duplex communications on 2-wire lines, or full-duplex on 4-wire.
Most modem manufactures have abandoned the Bell 202T in favor of the much higher speed modulation preferred in dial-up systems. However, Bell 202T remains the standard of choice in many utility and industrial applications where relatively small amounts of data are to be transmitted in multi-point networks.
To meet this continued demand, Data Connect Enterprise has added the MIU202T to its range of Communications Interface Units (see separate brochure).
The MIU202T can be powered from any AC or DC voltage in the range of 48V to 220V.A 9-36VDC version is also available. It is designed to work extended temperatures ranging from -40ᵒC to +80ᵒC, and its surge protected to 8kV, double the voltage requirements of IEC801-4 standard.
All of this is bundled in a 5-3/8“x 4” x 1-3/8,’ non metallic enclosure, suitable for desktop or wall mounting. Rack mount cards are also available for Data Connect Enterprise “Myriad” system (see separate brochure)
FEATURES
0-1200 bps, leased AC/DC powered substation hardened Bell 202T
0-1200 bps over voice grade leased lines
Point-to-point or multi-point
48 to 220V AC/DC Power Supply
9-36VDC optional power supply
IEC901-4 surge protection
-40ᵒC to +85ᵒC operating Temp.
For meters, RTUs, SCADA, etc.
Specifications
Data Rate:
Asynchronous 0-1200bps over voice grade leased or pilot lines
Modulation: Bell 202T
Operation: phase coherent, (FSK)
Full duplex over 4-wire
leased or private lines
Half duplex over 2-wire
leased or private lines
(constant or switched a carrier, Dip Switch selectable)
Power supply: 48VAC/DC (Optional 9- 36VDC)

Power consumption: 15mA @ 48VD; 7.5mA @ 115CDV; 7.5mA @ 125VDC
Digital Port: RS232 with DB9 Connector
Analog Port: RJ11
Power connector: 3-pin with screw terminals for
customer supplied cable
Case Size: 5-3/8” x 4” x 1-3/8”
Surge protection:
(Power Line): 8kV [Exceeds IEC801-4]
Surge protection:
(Analog Line): 3.75kVac
Operation equipment: -40ᵒC to +85ᵒC, 0 to 95%
humidity (non-condensing)
Carrier Frequencies:
Bell 202T…
Mark: 1200Hz ± 0.1%
Space: 2200Hz ± 0.1%