B&B Electronics ISOCON-6 - Manual - Manual (Page 14)

ISOCON-6 USERS GUIDE
When the unit is used to convert a thermocouple input it is important when
calibrating to ensure that the thermocouple simulator employed is switched to
automatic cold junction compensation and is at the same ambient temperature as the
ISOCON. Note that this is not always easy to achieve, especially if the ISOCON is
mounted in a warm cabinet. An altenative method is to use an ice-point reference
and a mV source.
6. INSTALLATION
The ISOCON’s input and output circuits are classed as Separated Extra Low
Voltage (SELV). This means that they must not be externally connected to voltages
exceeding 30V ac or 60V dc, nor do they generate voltages above these limits
internally. Where a higher voltage input is required a specially designed DIVIDER
unit can be used to condition the input signal prior to connection to the process
input terminals.
The ISOCON unit clips directly onto ‘Top Hat’ (TS35) symmetrical DIN rail.
Ideally, mounting orientation should be vertical, with the power supply situated on
the top face to minimise temperature rise. Good airflow around the unit will
maximise reliability of the instrument.
The use of bootlace ferrules is recommended on wiring terminations.
Do not exceed terminal torque rating of 0.4 Nm – use an appropriate screwdriver.
The unit can be removed from the DIN rail by sliding a small screwdriver into the
slot at the rear of the enclosure on the lower face and gently levering the metal clip,
whilst lifting the unit from the rail.
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14 IIG-010801