Woodward ProTech-SX - Panel Mount, HV/LV 8237-1242

Input Power Wiring

MicroNet controls require a fixed wiring installation for ac applications. Ground leakage exceeds 3.5 mA

AC. Maximum ground leakage for ac installations is 7.2 mA at 60 Hz. A ground conductor connected to

the chassis is required for safety. The power supply grounding terminal(s) should also be connected to

earth to ensure grounding of the power supply printed circuit boards. The grounding conductor must be

the same size as the main supply conductors.

Branch circuit fuses, circuit breakers, and wiring must meet appropriate codes and authorities having

jurisdiction for the specific country (CE, UL, etc.). See Table 4-4 for maximum recommended fuse or

breaker ratings. Do not connect more than one main power supply to any one fuse or circuit breaker. Use

only the wire sizes specified in Table 4-4 which meet local code requirements. Time delay fuses or circuit

breakers must be used to prevent nuisance trips.

See MicroNet Plus Power Supply Troubleshooting (Section 5.5) for a description of the LED indications.

Input power connections are made to the power supply through a plug/header assembly on the front of

the power supply.

For redundant operation, the control can use any combination of power supplies.

The power supplies can only be installed into slots PS1 (power supply #1) and PS2 (power supply #2). If

redundant power supplies are not needed, blanking plates must be installed in the slots not being used.

Branch circuit fuses, circuit breakers, and wiring must meet appropriate codes and authorities having

jurisdiction for the specific country (CE, UL, etc.). See Table 4-3 for maximum recommended fuse or

breaker ratings. Do not connect more than one main power supply to any one fuse or circuit breaker. Use

only the wire sizes specified in Table 4-3. which meet local code requirements. Time delay fuses or circuit

breakers must be used to prevent nuisance trips.