Hach ORBISPHERE 29122 User Manual page 7

Note: When the Interface Box is connected to the 3650Ex instrument, this also acts as a power supply to the
instrument and disconnects the internal battery power source.
Connect the power cable supplied with the instrument to the socket at the rear of the interface box for
alternative current (AC) power connection. To switch the instrument on and off, press the rocker
switch (right in the diagram) - " I " for On and " O " for Off. Refer to
If the device function does not start when the device is set to on, disconnect the power cable from the
socket and do a test. If the cable operates correctly, open the fuse box with a flathead screwdriver.
Refer to Figure 3. Do a test of the electrical continuity of the two fuses with an ohmmeter. If one fuse
or two fuses are blown, replace the blown fuse(s):
• T0.25AL 250 V, 5 x 20 mm-Replace with 29122.A 120 VAC
• T0.1AL 250 V, 5 x 20 mm-Replace with 29122.B 230 VAC
If the problem continues, contact technical support.
Figure 2 Rocker switch
Figure 3 Fuse box
Connection Pseudo RS232 Signal
Transmitted data (TTL-TXD)
Received data (TTL-RXD)
Not used
Not used
External voltage input (used with the model 29122 interface only in safe area)
Ground
Interface box to instrument 9-Pin female connector
Pin 2 TTL Transmitted data (TXD)
Pin 3 TTL Received data (RXD)
Pin 5 Power supply (V+)
Pin 9 Ground
Other pins not used
Table 1 Pin-connectors
Figure 2.
Interface box to PC 9-Pin male connector
RS-232 Transmitted data (TXD)
RS-232 Received data (RXD)
Ground
Not used
LEMO-6 Pin
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
English 7