Innotech Genesis II Digital Controller (v5) - Manual (Page 88)

Genesis II Installation Instructions
Page 88 © Mass Electronics Pty Ltd 2010 Edition 2.0 dated 06/12/2013
4-1.2.7 Voltage Checks
The wiring checks in the following paragraphs are performed with AISCs removed. The units are delivered with
their AISCs removed. Do not install the AISCs until all wiring checks are completed.
IMPORTANT
Ensure that no AC voltage is present on either terminal. AC voltage at the input terminals can cause damage to the
unit also the unit will not operate properly if the analogue input signal polarity is incorrect.
IMPORTANT
This paragraph contains procedures for checking analogue inputs associated with AISC Models D05,
D33, V05 and V10. Note from Table 4-3 that inputs associated with Digital AISC D05 will be either Zero
Volts OR 5VDC but not between the two extremes. The same is true for AISC D33 except that the
voltage range is Zero OR 10VDC.
Note also that inputs associated with AISC Models V05 (0 – 5VDC) and V10 (0 – 10VDC) may be at any
value within the ranges noted.
Procedures for performing voltage checks are:
1. Ensure all AISCs have been removed and no power is applied to the Genesis II Digital Controller.
2. Connect a digital voltmeter to the input terminals; set the voltmeter to indicate VAC. Ensure
there is no AC voltage present on either terminal. If AC voltage is measured, check the analogue
input wiring for faults/errors.
3. Set the digital voltmeter to indicate VDC. Set the range for the expected voltage value shown in
Table 4-3 .
4. Connect the voltmeter across the analogue input terminals observing polarity. If necessary,
reduce the voltmeter range to obtain an accurate reading.
5. Ensure the measured voltage is within the expected range and of the correct polarity. If not,
check the analogue input wiring for faults/errors
6. Repeat Steps 2 through 5 for the remaining inputs associated with the AISC models noted
above.
4-1.2.8 Current Checks
This paragraph contains procedures for checking analogue inputs associated with AISC Models I05,
I20, P20, TD1 and TD2.
Procedures in this paragraph require connecting a 500 Ohm resistor across the analogue input terminals and
measuring the resultant voltage. Although 500 Ohms is suitable in most cases, some applications may require a
higher value of resistance to avoid damage to circuits. Always ensure that a suitable resistor is used.
CAUTION
Analogue inputs associated with the I05, I20, TD1 and TD2 AISCs are checked by measuring voltage
across a resistance connected in series with the current source. A 500 Ohm resistance is normally
suitable for this procedure.