GE Fanuc IC697PWR748 90W Power Supply Module

IC697PWR748 Power Supply Module

Product Introduction

The GE Fanuc IC697PWR748 is a robust power supply module engineered for the 90-70 Series programmable logic controllers. This unit plugs directly into the leftmost slot of the rack, connecting via a 48-pin backplane-mounted connector. It delivers three distinct DC output voltages, totaling 90 watts of power, to support the CPU, I/O modules, and other rack components.

Specifically, this power supply generates +5 VDC at up to 18 amps, +12 VDC at up to 1.5 amps, and -12 VDC at up to 1 amp. Such a configuration ensures stable operation for digital and analog modules alike. Furthermore, the IC697PWR748 accepts a wide input range from 35 to 60 VDC, making it suitable for industrial battery-backed systems or DC distribution networks. Its slide-in rack mount construction simplifies installation and replacement, reducing maintenance downtime significantly.

Key Features and Protection Mechanisms

This module stands out due to its comprehensive protection features. First, it includes an electronic overcurrent limit for each output. For instance, the +5 V bus is limited to 26 amps maximum, while the +12 V and -12 V outputs are capped at 4 amps and 2 amps, respectively. These limits prevent damage during fault conditions or accidental short circuits. Moreover, the power supply employs an overvoltage protection circuit that clamps the +5 V output at approximately 6.7 volts, safeguarding sensitive logic components.

Additionally, a short circuit on any output does not open the internal fuse. Instead, the supply enters a foldback mode, reducing voltage until the overload is removed. If an internal fault triggers the overvoltage protection, however, the 5 amp, 250-volt fuse may open. Replacement is straightforward using a standard 5x20 mm fuse. The IC697PWR748 also features a 10-millisecond ride-through time at full load, which buffers against brief input interruptions and prevents unexpected system resets.

Dual Rack Operation

One notable advantage of the GE Fanuc IC697PWR748 is its ability to power two racks from a single unit. This capability reduces hardware costs and cabinet space, particularly in distributed control systems. To achieve dual-rack operation, several conditions must be met. Specifically, the second rack must require only +5 V power, and its current draw must remain below 5.2 amperes. Additionally, the total power for both racks must stay within the 90-watt rating.

The interconnection requires a dedicated cable, specifically the IC697CBL700, which carries +5 V and sequencing signals through a 9-pin D-type connector. This cable connects directly to the backplane via an opening in the rack frame. It is important to note that this cable does not carry inter-rack communication data; separate bus interface modules are needed for that purpose. Consequently, this setup suits applications where simple power extension suffices without complex data sharing.

Temperature Derating and Environmental Limits

For reliable long-term operation, consider the ambient temperature derating requirements. At temperatures exceeding 50°C (122°F), the maximum output power must be reduced according to the specified derating curve. This ensures the internal components remain within safe thermal limits, thereby extending the module's service life. In typical industrial environments with forced-air cooling, the IC697PWR748 performs consistently across a wide temperature range.

Installation Guidelines

Proper installation of the IC697PWR748 ensures optimal performance and safety. Begin by verifying that the input voltage falls within the 35 to 60 VDC range. Next, slide the module into the leftmost slot of the 90-70 Series rack until it fully engages with the backplane connector. Secure the retaining screws to hold the unit firmly in place. Then, connect the DC input wires to the designated terminals, observing correct polarity. For dual-rack configurations, attach the IC697CBL700 cable to the auxiliary rack and route it carefully to avoid strain.

After installation, power on the system and verify the output voltages using a multimeter. The +5 V reading should be between 4.90 and 5.25 volts, while the ±12 V outputs must fall within ±11.75 to ±12.6 volts. Always ensure a minimum load of 1.0 amp on the +5 V bus to maintain regulation. Furthermore, avoid hot-swapping the module while the system is energized to prevent arcing or damage.

Packaging List

Each GE Fanuc IC697PWR748 unit includes the following items:

• One IC697PWR748 power supply module

• One instruction sheet with basic wiring diagram

• Two fixing screws for rack mounting

Please note that the IC697CBL700 dual-rack cable, fuses, and power cords are sold separately. The packaging complies with industrial shipping standards to prevent transit damage. We ship via Fedex, UPS, or DHL for reliable global delivery.

Frequently Asked Questions

1. Can the IC697PWR748 operate from a 24 VDC supply?
No, this module requires a nominal 48 VDC input. The acceptable range is 35 to 60 VDC, so a 24 V system is insufficient.

2. What happens if I overload the +5 V output beyond 18 amps?
The overcurrent protection activates once the current exceeds the 26-amp limit. The output voltage drops until you reduce the load, but the fuse does not blow.

3. How do I connect a second rack to this power supply?
Use the IC697CBL700 cable, which carries +5 V and sequencing signals. Plug it into the 9-pin D-type connector on the second rack's backplane.

4. Is the IC697PWR748 compatible with the RX3i PACSystem?
No, this power supply is designed specifically for the 90-70 Series. For RX3i systems, refer to the IC695 or IC698 power supply families.

5. What fuse rating should I use if the original blows?
Replace it with a 5 amp, 250-volt, 5x20 mm fast-acting fuse. Always verify the cause of the fault before installing a new fuse.