Marathon TSC 900 - AC Control Power Input; Auxiliary DC Control Power Input; Programmable Inputs; Controller Outputs

TSC 900 TRANSFER SWITCH CONTROLLER
PM 151 REV 1 15/10/08 Thomson Power Systems
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2.5. AC CONTROL POWER INPUT
The TSC 900 requires 120VAC (nominal) control power input voltage. Independent AC control
power is required from both utility and generator supplies via potential transformers. AC
control power is utilized for internal TSC 900 control circuits and external control device loads.
The TSC 900 requires approximately 12VA AC power for internal control circuits. The
maximum external load is limited by output contact ratings (i.e. 10A resistive, 120/250VAC).
Total AC control power requirements for each supply must be determined by adding both
internal and external load requirements.
2.6. AUXILIARY DC CONTROL POWER INPUT
The TSC 900 can be optionally supplied with 24Vdc auxiliary control power input voltage for
applications requiring continuously energized control and display features. The maximum input
power draw is 20Watts. The 24Vdc power must be from a regulated/filtered DC supply with
maximum +-10% voltage range.
2.7. PROGRAMMABLE INPUTS
The TSC 900 provides Qty 16 Programmable Inputs. Each input is activated by external
contact closure to common (i.e. DC Negative ground). Each programmable input can be
independently programmed to different functions. Refer to Programming section for available
features.
2.8. OUTPUTS
The TSC 900 provides the following types of output circuits:
Engine Start Contacts
Qty 2
Isolated Form B contacts (10A, 250VAC Resistive)
Programmable Output Contacts
Qty 8
Isolated Form C contacts (2A, 250VAC Resistive)
Close to Utility Supply
Qty 1
120VAC
1
, 10A (Resistive) powered output contact
Close to Generator Supply
Qty 1
120VAC
1
, 10A (Resistive) powered output contact
Trip Utility Supply
Qty 1
120VAC
1
, 10A (Resistive) powered output contact
Trip Generator Supply
Qty 1
120VAC
1
, 10A (Resistive) powered output contact
1
NOTE: Output voltage is dependent upon AC control power input voltage.
Interposing relays are required between the TSC 900 outputs and the end device if loads
exceed the output current rating.
2.9. EXTERNAL ATS CONTROL WIRING
As a minimum, all external control wiring to/from the ATS must conform to the local regulatory
authority having jurisdiction on electrical installations. Specific wire sizes listed below are for
typical circuits of distances up to 500ft (150m)
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, are as follows:
Utility or Generator Voltage Sensing #14 AWG (2.5mm
2
)