7. CMON 2504 and CMSS-ONL-2504 Installation Validation and
Debugging Procedure
The following procedure can be used to identify the source of a malfunctioning AEE installation. This procedure is also required prior to the
commissioning of an installation and can therefore be considered standard procedure. The procedure is outlined in flowchart format and only
a digital voltmeter is required.
Note that the following nomenclature (J1-1, etc.) is used when referring to the CMON 2504 terminals (Input + etc.).
• J1-1: AE sensor signal / phantom power line (Input +)
• J1-2: AE sensor 0 V return (Input –)
• J1-3: not used
• J2-1: +12 to +24 V DC power supply input ()
• J2-2: 0 V DC power supply input and signal ground (Supply –)
• J2-3: not used
• J3-1: AE DIN interface demodulated output ()
• J3-2: not used
• J3-3: Signal ground (Output –)
Check power
supply
Check wiring
Check wiring and
IMx DIP settings
IMx-W
IMx-S
Check wiring
External supply
Low Power
Measure voltage
across J2-1 and J2-
2
< 11V
Power OK
>11V
1. Check CMON
2504 Power
Supply
2. Check CMON
2504 input
Measure voltage
across J1-1 and J1-
2
Sensor & cable OK
>6.9V & <7.1
Cable fault
>7.1V
<6.9V
3. Check CMON
2504 output
Measure voltage
across J3-1 and J3-
3
CMON 2504 OK
<0.1V
CMON 2504
fault / bad power
ground
>0.1V
Correct the
polarity
Check cable
polarity
Polarity wrong
Polarity OK
Proceed to CMAC
2504 testing
Fig. 4. Installation validation and debugging flowchart for CMON 2504
installations. Terminal voltages to be measured using a digital voltmeter
(DVM) or a multimeter.
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