Woodward MicroNet TMR 5009, Installation/Hardware Manual

Page: 41 / 118

Manual 85580V2 5009 Installation/Hardware
Woodward 33
Figure 4-1. Shield Termination Diagram
Input Power
Branch circuit fuses, breakers, and wiring must have applicable safety approval
and be selected according to applicable codes and area classifications. The
system disconnect MUST be in easy reach of the operator and marked as a
disconnect device. Each main power supply must have its own branch circuit
rated fuse, or circuit breaker with a rating no more than 250% of the maximum
rated current of the power supply (see Table 4-1). Do not connect more than one
main power supply to any one fuse or circuit breaker. Use only the wire sizes
specified in Table 4-1, or equivalent metric sizes which meet local code
requirements.
Each 5009 control requires a power source capable of a certain output voltage
and current. For AC sources, this power rating is stated in Volt-Amps (VA). The
maximum VA of a source can be calculated by taking the rated output voltage
times the maximum output current at that voltage. This value should be greater
than or equal to the 5009 control VA requirement.
Note that control’s main power supplies are not equipped with input power
switches. For this reason, some means of switching input power to each main
power supply must be provided for installation and servicing. A circuit breaker
meeting the above requirements or a separate switch with appropriate ratings
may be used for this purpose. An appropriately sized fuse or circuit breaker must
be provided for each 5009 power supply. Refer to Table 4-1 for recommended
fuse ratings, circuit breaker ratings and wire sizes. Use only time-delay fuses or
circuit breakers to avoid nuisance trips. A fixed wiring installation is required.
Power supply leakage current exceeds 3.5 mA so a protective earth ground
connection is required.