Innotech Genesis II Digital Controller (v5) - Manual (Page 90)

Genesis II Installation Instructions
Page 90 © Mass Electronics Pty Ltd 2010 Edition 2.0 dated 06/12/2013
4-1.3 Install AISCs
Analogue Input Signal Conditioners (also referred to as Input Straps in some other Innotech
documents) are insert plugs used to configure the Genesis II unit’s input to match the analogue input
device. All units having analogue inputs require an AISC for each input channel; these units are:
• Genesis II Digital Controller
• MPCII Mid Points Controller
• GENII AI REM Analogue Input Module
With all power off, and using the computer-generated wiring diagram ( Figure 4-5 ) as a guide, insert
each AISC module into its assigned slot. The modules are keyed to prevent them from being plugged-
in backwards. When all AISCs are installed, double-check the installation. The system will not
operate correctly with an AISC plugged into the wrong slot.
4-1.2.10 Checking Analogue Output Wiring
Analogue output wiring is checked for the following reasons:
• To ensure the analogue output terminals are free of any external voltage
• To check continuity through the external analogue circuit
• To ensure the resistance of the external analogue circuit is sufficient to avoid overloading the
analogue output circuit.
The following procedures apply to analogue outputs of the GENII DDC Digital Controller, MPCII Mid
Points Controller, GENII AO REM Analogue Output Module and the GENII MP REM Multipoint Module.
Refer to the Electrical Installation chapter for analogue output terminal numbers for the applicable
Genesis units.
Procedures for performing Analogue Output wiring checks are:
1. Ensure the operating power to the unit is off.
2. Turn on the excitation and operating power for the digital inputs, digital outputs and, as
applicable, the analogue inputs. The reason for this step is to detect the presence of voltages at
the analogue output terminals that may be caused by “sneak” circuits or wiring errors.
3. At the analogue output terminal, disconnect the active signal wire for the first analogue output.
4. Connect a digital voltmeter between the disconnected signal wire and the common terminal.
5. The voltmeter should indicate Zero Volts. Set the voltmeter range as low as possible to ensure
there is no voltage present.
6. Set the volt-ohm-meter to the Ohms range. The volt-ohm-meter should indicate a minimum
resistance of 2,000 or 5,000 Ohms (See note below). A reading of Infinite Ohms indicates an
open circuit condition that should be corrected.
7. Disconnect the meter and reconnect the signal wire disconnected in Step 3.
8. Repeat Step 3 through Step 7 for the remaining analogue outputs.
9. Turn off any power applied in Step 2.
The analogue output circuit resistance for the Genesis II Digital Controller and the MPCII Mid Points Controller
should be at least 2,000 Ohms. The circuit resistance for the GENII AO REM should be at least 5,000 Ohms.
NOTE