Inncom Modeva - Load Assembly Parallel Power Supplies; MODEVA System Technical Specification

M O D E V A R e f e r e n c e M a n u a l P a g e 8 o f 16
5.5 Load Assembly Parallel Power Supplies
Hot
Neutral
120/240VAC
50/60Hz
Lighting Load
WBI Actuator 1
200mA
375mA550mA
WBI Actuator 2 WBI Actuator 3
12VDC
GND
R
Load
WBI MOSFET
Dimmer
WBI MOSFET
Dimmer
WBI MOSFET
Dimmer
Figure 5 Parallel Power Supplies
The WBI actuators operate in parallel to supply a higher load capacity than that achievable by a single actuator.
The total output power of the actuators in parallel is based on the voltage specifications at maximum load versus
the output current at maximum load and a nominal recover time after a fold back condition occurs. Therefore, the
sum of paralleled power supplies is not simply I1 + I2 + I3= I max. However, aggregate power of the paralleled
supplies is greater than that available from a single source.
The benefit of this design is the ability to aggregate actuators into a system that permits load sharing without
concern for back feeding voltage that typically occurs when more than one supply is used. A triple ganged
MODEVA system can provide up to 550mA to power 12VDC S5-bus devices in the circuit. INNCOM
recommends the use of up to seven power supplies in any given network segment. A disadvantage is that a short
condition on any one of the actuators will drag all of the actuators into a fold-back state until the short condition
is resolved.
Number of Load Assemblies
Nominal Voltage
Voltage at Maximum
Load
Output Rating
Single Actuator
+12VDC
+11.0VDC
200mA
Two Actuators
+12VDC
+11.0VDC
400mA
Three Actuators
+12VDC
+11.1VDC
600mA
Four Actuators
+12VDC
+11.1VDC
700mA
Five Actuators
+12VDC
+11.2VDC
800mA
Six Actuators
+12VDC
+11.2VDC
900mA
6 MODEVA System Technical Specification
Mechanical Package
Length
Width
Height
American Single Gang
119mm
74mm
8.0mm
American Double Gang
119mm
124mm
8.0mm
American Triple gang
119mm
174mm
8.0mm