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Bulk +6/12Vdc Supply Current = CPU* + Sum of all ECOM Modules, I/O Modules, optional
Boards & Optional External Modem/Radio
This summation will accommodate steady state current draw. Table 2-16 provides detailed
steady state power current requirements for each ControlWave EFM Base Assembly
module. Note: In the case of an external modem/radio, the unit's manufacturer provides
power consumption specifications. Power requirements for the optional Digital to Relay I/O
Board, 21V Power Supply Board and the Battery Charger/Power Manager Board are
provided in Sections 4.5, 4.6 and 4.7 (respectively) of this manual.
Table 2-16 - ControlWave EFM Base Assembly Power Requirements
COMPONENTS
CPU* = CPU + SCM + Backplane
Non-Isolated AI/O Module
Non-Isolated DI/O Module
Non-Isolated HSC Module
Non-Isolated Mixed I/O Module
(with optional AO Board)
ECOM Module
(without Modem/Radio)
ECOM Module
(with MultiTech Modem)
ECOM Module
(with MDS Radio)
ECOM Module
(with Modem & MDS Radio)
ECOM Module
(with FreeWave Radio)
ECOM Module
(with Modem & FreeWave Radio)
Note: Current consumption provided in Table 2-15 is based on the standard
Electronic Flow Computer application load.
2.3.9.2 Power Wiring
DC Power is interconnected to the System Controller Module (SCM) on Connector TB1. One
Bulk DC supply can be connected to the ControlWave EFM SCM. The Bulk DC supply
(nominally +6Vdc or +12Vdc) connected to TB1-1 (+VIN on SCM) is converted, regulated
and filtered by the SCM to produce +3.3Vdc. This SCM circuit is fused at 1A. The operating
range of the SCM is +4.5/4.9Vdc to +16.0Vdc (nominal +6Vdc input source) or +9.6/10.3Vdc
to +16.0Vdc (nominal +12Vdc input source).
SCM Connector TB1 provides 3 input connections for bulk power as follows:
TB1-1 = (+VIN) (+4.5/4.9V to +16V dc for +6V bulk) (+9.6/10.3V to +16V dc for +12V bulk)
TB1-2 = (-VIN) (Supply Ground)
TB1-3 = Chassis Ground - CHASSIS
Figure 2-34 - SCM (TB1) Typical Wiring Scheme
2-46 / Installation & Operation
BULK 12Vdc Supply
8.6mA
2.8mA + (47.2mA - VEXT)
12mA
5mA
16.67mA + (24.3mA - VEXT)
22mA
56mA
277mA
311mA
272mA
306mA
BULK 6Vdc Supply
14mA
5.6mA + (47.2mA - VEXT)
24mA
10mA
34mA + (24.3mA - VEXT)
45mA
112mA
555mA
622mA
545mA
612mA
CI-ControlWave EFM
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