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Model 263 Isolation Barrier Unit (IBU)

Model 263 Isolation Barrier Unit

Electrical /Acoustical

Telephone Network Interface................. (2-wire)....................................... BELL Pub. 61100 Compatible

AC power input ..................................... Voltage (selectable) ..................................................... 90-132 V

Frequency ...................................................................................................................... 47-63 Hz

Current ....................................................................................................... 0.5 amps (maximum)

Ringer pitch adjust .............................................................................................. 1 kHz - 8 kHz (nominal)

Intrinsically safe Interface

Voltage (maximum) ........................................................................................................... 8 volts

Resistance (minimum) .................................................................................................... 66 ohms

Current limited (maximum).............................................................................................. 136 mA

Indicators

I.S. Loop Current.......................................................................................................... I.S. LOOP (GRN)

I.S. Lock Detect............................................................................................................ I.S. LOCK (GRN)

Telephone Line Loop Current............................................................................................ TELCO (YEL)

Hook .................................................................................................................................. HOOK (YEL)

Mechanical

Housing construction........................................................................................ Glass-reinforced polyester

Housing dimensions ............................... 9.39 W × 13.16 H × 7.46 D inches; (238.5 × 334.3 × 189.5 mm)

Enclosure rating (UL)................................................................................................ Type 3R (rainproof)

Weight .......................................................................................................................... 8.5 lbs. (3.86 kg)

Model 263 IBU 4-Wire Option Interface

Receive (TB2-1, 2) ................................................................................................................. Dry (No dc)

Signal Level....................................................................................................... 0 dBm (nominal)

Transmit (TB2-3, 4) ........................................................................................................................... Wet

DC Loop Current ................................................................................................... 20 mA-70 mA

Signal Level....................................................................................................... 0 dBm (nominal)

Ring Voltage Input............................................................................................... 40 V-150 Vrms

\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-178d.doc

03/06

(4-wire)........................................................... See 4-wire option

Pub. 42004-178D

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180-240 V

+3 dBm (maximum