HIMA F7131 981713102 Power supply monitoring module
The HIMA F7131 (part number 981713102) is a Power Supply Monitoring Module used specifically within the PES H51q (HIQuad) safety systems.
Its primary job is to ensure that the $5\text{ V DC}$ system voltage—generated by up to three power supply modules—remains stable and within safety limits.
It also manages the backup batteries that keep the system’s memory (SRAM) alive during power losses.
Technical Specifications
| Feature | Details |
| Primary Function | Monitoring up to three $5\text{ V DC}$ power supplies |
| Compatibility | HIMA H51q systems (works with F 8650 / F 8651 CPUs) |
| Space Requirement | 4 units of width (4 TE) |
| Power Consumption | $5\text{ V DC}$ at $25\text{ mA}$; $24\text{ V DC}$ at $20\text{ mA}$ |
| Battery Type | CR-1/2 AA-CB (HIMA Part No. 44 0000016) |
| Indicators | 3 Front-facing LEDs for voltage status |
Key Features & Maintenance
Voltage Monitoring: The module provides three “test bits” to the central modules.
This allows the safety program to trigger an alarm or a controlled shutdown if one of the power supply units fails.
Extended Monitoring: It can also monitor additional power supplies (like the B 9361 assembly kit) via three $24\text{ V}$ outputs (PS1 to PS3).
Battery Management: The internal buffer batteries are critical for data retention.
Lifetime: Approximately 1.000 days at $25^\circ\text{C}$ (unpowered).
Recommendation: HIMA recommends replacing the batteries every 4 to 6 years, even if the system is constantly powered, to prevent leakage or sudden failure during a blackout.
Troubleshooting Tips
F7131
LEDs Off: If the front LEDs are not lit, check the incoming $5\text{ V}$ supply from the power modules or ensure the F7131 is properly seated in the rack.
Battery Faults: If your CPU reports a “Battery Low” or “SRAM Error,” the F7131 is the first place to look. Ensure the batteries are fresh and the contacts are clean.