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+16Vdc), you can determine the point at which the unit turns off, i.e., the point at which the
PWRGOOD LED on the SCM goes OFF (Vt-). If the value of the bulk power supply's +6Vdc
or +12Vdc output approaches the value of Vt+ or Vt- it should be replaced by a power
supply with the correct +6V or +12V output.
WATCHDOG LED
(Red)
IDLE LED
(Red)
Staus LEDs
(Red)
J2
Display Intf.
Connector
TB1
Input Power
Connector
TB2
RT D Interface
Connector
P2
MVT Interface
Connector
Figure 3-2 - System Controller Module's Component & LED Designations
3.3.2 LED Checks
All ControlWave EFM Modules contain light emitting diodes (LEDs) that provide
operational and diagnostic functions. A brief synopsis of the individual module LEDs is
provided as follows:
SCM:
1 IDLE LED, 1 Watchdog LED, & 6 System Status LEDs
CPUM:
2 LEDs per Comm. Port = 6
ECOM1: 2 LEDs per Comm. Port = 8
ECOM2: 2 LEDs per Comm. Port = 8
AI/OM:
None
DI/OM:
1 LED per DI x 12 = 12 DI LEDs, 1 LED per DO x 4 = 4 DO LEDs
HSCM:
1 LED per HSC x 4 = 4 HSC LEDs
MI/OM:
None
3-6 / Service
JP5, JP6, JP7, JP8 & JP9
1-to-2 Installed = 12V Bulk System
CR27
2-to-3 Installed = 6V Bulk System
CR26
1
JP6
JP7
CR25
1
1
CR24
JP5
SW1 = Mode Switch
J2
RJ-45
1A
(+4.5/4.9Vdc to +16.0Vdc for +6V supply)
TB1-1
+VIN (+9.6/10.3Vdc to +16.0Vdc for +12V supply)
TB1-2
-VIN (Supply Ground)
TB1-3
Chassis Ground (CHASSIS)
JP8
JP9
1
1
2
P1
CI-ControlWave EFM
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