AD-TW 401 GS, AD-TW 402 GS


The separation converter serves the galvanic separation of impressed currents. It obtains its auxiliary energy form the input signal. The device is available as a single-channel (AD-TW 401 GS) or dual-channel (AD-TW 402 GS) version. The connection of an additional auxiliary voltage is not necessary. The output current is independent of the connected load up to the maximum value. The isolating transformer is also available as a TWB variant, which does not interrupt the input current if its output current is interrupted (bypass function).

AD-TW 401 GS, AD-TW 402 GS


Economic separation of computer inputs, protection of sensitive units against potential delay, galvanic decoupling in complex measuring units.

Business data

Order number
AD-TW 401 GS One channel
AD-TWB 401 GS Einkanalig mit Bypass
AD-TW 402 GS Two channels
AD-TWB 402 GS Zweikanalig mit Bypass


Data sheet (Error: Datei nicht gefunden !!!)
Safety instructions pdf ad-safety-instructions.pdf (43 kB)

Technical specifications

Input current
Measuring range 0 ... 20 mA
Input voltage < 25 V
Drop voltage < 2,5 V
Oscillation current < 80 µA
Output current
Output range 0 ... 20 mA
Max. burden 600 Ohm
Burden error -0,03% / 100 Ohm
Residual ripple 0,5 % (500 Ohm; 20 mA)
Transmission behaviour
Basic accuracy < 0,2 %
Input / output 1 : 1
Temperature influence 50 ppm/K
Response time ~ 20 ms
Transmission frequency 500 Hz (500 Ohm)
Dimensions (WxHxD) 20x30x16,5 mm
Type of protection IP 20
Connection method Screw clamp
Weight Max. 150 g
Environmental conditions
Ambient temperature -10 ... 50 °C
Storage and transport -10 ... 70 °C (no condensation)
Product family standard EN 61326-1 1)
Emitted interference EN 55011, CISPR11 Cl. B, Gr. 1
Galvanic isolation
Base isolation, functional separation
Working voltage 50 V DC
Test voltages input / output 500 V, 50 Hz (1 min.)
1) During checking, slight signal deviations are possible.

Block and wiring diagram

AD-TW 401 GS, AD-TW 402 GS


AD-TW 401 GS, AD-TW 402 GS

CAD / CAE Daten

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