Terminal Block-2 (Communications) - ION TITAN 2 User Manual

The 4-20mA output can share the instrument Power Supply if:
•
the 4-20mA output goes to the same location as the instrument
power supply and
•
their Grounds will be connected together.
If that is so, connect a jumper from Pin 9 of Terminal Block-1 to Pin-1 of
Terminal
Block-2

Terminal Block-2 (Communications)

Pin Label Function
1 4-20mA transmitter DC Power
I+
Input (Positive)
24VDC (max= 32VDC)
2 4-20mA output return
I -
3 RS485 Ground (0V)
0
(See Note 4)
4 RS485 interface D (-)
B
5 RS485 interface D (+)
A
NOTES:
1. For RS485 termination resistor, put a jumper link on the L1 header between the
middle pin and the pin labelled 120R.
This puts a 120R termination resistor across 'A' and 'B' of Terminal Block-2 (See
RS485 Connections diagram for more details).
To disconnect the resistor remove the jumper completely.
2. The 4-20mA output has an inline fuse, for protection against accidental short
circuit, see F2 on the above diagram.
P eering Gas Sensing Technology.
ion
TITAN 2 Instrument User Manual V1.0
Page 27 of 66 ionscience.com