YSI IQ SensorNet MIQ/A-MOD Module - Manual (Page 12)

Interface for the Modbus RTU MIQ/(A-)MOD
12 ba76021e01 01/2012
3.2.2 Connecting the Modbus cable
The MIQ/(A-)MOD component can be connected at the Modbus end
(A) or with a loop-through (B).
An RS 485 point-to-point connection has to be installed as a
component at the end of the Modbus (A).
Fig. 3-4 Connection options of the MIQ/(A-)MOD at the Modbus cable,
(A) at the end or (B) with loop-through
Note
All cables with electrical characteristics according to EN 50170 are
suitable as a Modbus cable (e.g. all Profibus cables).
(A)
Connecting the
MIQ/(A-)MOD
component
at the Modbus end
Fig. 3-5 Modbus cable with insulating tape
(A) (B) (A) instrument connected
at the Modbus,
e.g. MIQ/(A-)MOD
Modbus cable
1 Carefully strip the Modbus cable insulation for approx. 20 mm.
2 Bare the Modbus wires from the shielding braid and strip them
for approx. 5 mm.
3 Twist the shielding braid and cover it with approx. 15 mm
insulating tube.
4 Insert the Modbus cable into the module housing of the MIQ/
MC(-A)-MOD through the screwed cable gland.
5 Additionally insulate the transition between cable sheath and
insulating tube of the shielding braid (e.g. with insulating tape
or shrinkable tubing), so that no shielding braid is uncovered.