BAS-SVX46E-EN
11
Power Budget
This section provides information about power budget consumption for the UC400, UC600, and
XM70/XM90 when using XM30 and XM32 expansions modules.
Calculating DC Power Consumption
The Tracer UC600 controller is capable of providing 600 mA of power. Observe the following
rules when budgeting for DC power:
• The UC600/XM70/XM90 can power a maximum of two small expansion modules.
• Each UC600/XM70/XM90 can power up to 10 points configured as 4 to 20 mA In/Out (loop
powered).
• Include any additional devices where Tracer UC600 is providing 24 Vdc.
Use the following table to help determine your UC600/XM70/XM90 DC power supply needs.
Table 6. Tracer UC600/XM70/XM90 DC power budget worksheet
Component
No. of terminations
mA power draw
Total mA
Base electronics plus binary outputs
1 x 146 146
0 to 20 mA Universal inputs/outputs
x 20
XM30 expansion module
x 120
XM32 expansion module
x 100
Additional DC powered devices
n/a n/a
Total DC power draw must be less than 600 mA for UC600/XM70, less than 800 mA for the XM90 Total
Tracer UC400 Power Budget
The Tracer UC400 is capable of providing up to 200mA of DC power dedicated to the IMC link.
Consider the following when budgeting DC power for a UC400:
• In most applications the UC400 can support a maximum of two expansion modules without
any issues, provided that all terminations are NOT configured for 0 to 20mA.
• The UC400 can support a maximum of two XM30 modules with seven terminations
configured for 0 to 20mA, running continuously at 20 mA.
– If all 0 to 20 mA terminations are expected to run continuously at 20mA, a PM014 power
supply module should be used instead of the IMC link to power both modules.
NNoottee:: For more details, see Tracer UC400 Installation, Operation, and Maintenance, BAS-SVX20-
EN.
Expansion Module Power Requirements
XM70/XM90 Module Power Requirements
To ensure proper operation of the XM70/XM90, install the power supply circuit in accordance
with the following guidelines:
• The XM70/XM90 must receive AC power from a dedicated power circuit; failure to comply
may cause the controller to malfunction.
• A dedicated power circuit disconnect-switch must be near the XM70/XM90, easily accessible
by the operator, and marked as the disconnecting device for the controller.
• DO NOT run AC power wires in the same wire bundle with input/output wires; failure to
comply may cause the expansion module to malfunction due to electrical noise.
• 18 AWG copper wire is recommended for the circuit between the transformer and the
expansion module.
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