14 BAS-SVX084A-EN
Wiring Installation
b. The Status LED illuminates solid green when the controller is finished booting.
Note: If the sequence completes as described, the controller is properly booted and ready for the
application code. If the Status LED flashes red, a fault condition exists.
Guidelines
• Use 18 AWG copper wire (recommended) for power and connect to terminals XFRM 24 Vac and
.
• Use U.L. listed, Class 2 power transformer, 20.4 to 27.6 Vac (24 Vac nominal).
• Size the transformer to provide adequate power to the Symbio 210 controller (24 VA maximum)
and outputs (maximum 12 VA for each binary output).
Important: A dedicated 24 Vac, Class 2 transformer is recommended to power the Symbio 210
controller. When powering multiple controllers from one transformer, polarity must
be maintained. Terminal 24 Vac is designated positive (+) and terminal is
negative (-) to the unit casing ground. It is important to include power consumption
in the calculations.
• The power consumption for cooling-only Series F Models (VariTrac™ and VariTrane™) is up to
26 VA. Refer to Table 5, p. 14 for information about calculating actual VA requirements.
Table 5. Calculating actual VA requirements
Item Sub VA Draw Per I/O (24 Vac)
Maximum Total VA Draw (24
Vac)
Symbio
210 Board
Symbio
210 (No I/O) 8 VA
Symbio 210e (No I/O) 9.5 VA
3 x AI
(a)
0 VA per AI 0 VA
2 x UI
(a)
0 VA per UI 0 VA
1 x PI 0.3 VA per PI 0.3 VA
1 x BI 0.1 VA per BI 0.1 VA
2 x AO 1.1 VA Per AO 2.2 VA
5 x BO (TRIAC) 0.1 VA Per TRIAC (No Load) 0.5 VA
Subtotal for Symbio 210 with all I/O used 11.1 VA
Subtotal for Symbio 210e with all I/O used 12.6 VA
24 Vdc Supply
200 mA
(b)
IMC and I/O 1 VA Per 20 mA DC 10.0 VA
250 mA USB Host 3 VA Per USB Host 3.1 VA
Total for Symbio
210 fully loaded 24.2 VA
Total for Symbio
210e fully loaded 25.7 VA
Binary Outputs (TRIAC) 5 x BO (TRIAC) 0.5 A @ 24 Vac = 12 VA per BO 60.0 VA
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