Tegam 3550 - Outputs

5-3
3550 LCR Meter Instruction Manual Programming and Interfacing
Control I/O Connector cont’d:
Outputs
The 3550 has 5 data output lines available for external monitoring. Each of the data outputs are
optically isolated and current limited through the use of a constant current diode as shown in the
illustration below:
Figure 5.2 – Output Schematic
Photo
Coupler
Fixed Current
Diode
13~20, 38~44
1, 26 VCC (EXT)
2, 27
EMITTER COMMON (EXT)
+5V
330ƻ
10mA