Power Supply SD 802F / SD 812F

Features 

… Redundant input voltage 24 V DC, provides operation in accordance with NAMUR 

… Power supply outputs provide: 

SD 802F: 5 V DC / 5 A and 3.3 V DC / 5 A 

SD 812F: 5 V DC / 5.5 A and 3.3 V DC / 6.5 A 

… Enhanced power-fail prediction and shutdown procedures 

… LED indication for power supply status and operating status of the AC 800F 

… Short circuit proof, current limited 

… 20 ms backup energy for use in the event of primary power failure, according to NAMUR

Description 

The AC 800F modules are supplied with 5 V DC / 5 A and 3.3 V DC / 5 A auxiliary power by the SD 802F power supply module, resp. with 5 V DC / 5.5 A and 3.3 V DC / 6.5 A by the SD 812F. The power supply has open-circuit, overload and sustained short-circuit protection. The electronically controlled output voltage provides high stability and low residual ripple. 

In case of power loss ≥ 5 ms, the power supply module generates a power-fail signal. This signal is used by the CPU module to shut down operations and enter to a safe state. This is required for a controlled restart of the system and the user application when power is restored. The output voltage remains within its tolerance limits for at least another 15 ms. Altogether an input voltage drop of 20 ms will be managed.

LED Displays

Power 

Green Internal supply voltage is available 

Failure 

Off Normal status 

Orange Self test 

Flashing orange Overtemperature occurred during operation 

Red Hardware failure of the basic unit 

 Flashing red Software failure of the system 

Run/Stop 

 Green Processing active 

 Flashing green Process was stopped and is now started 

again 

 Red Processing inactive 

 Flashing red Process was active and is stopped now 

 Orange Self test 

 Off Software initialization 

Prim/Sec In case of redundancy please see the 

LED’s meaning in manual “Mounting and 

Installation Instruction”. 

For not redundancy the states are: 

Orange Self test 

Off Normal status

Technical Data SD 812F 

Input voltage 2 x direct current 24 V DC 

permissible range 19.2 - 32.5 V DC 

Input current at 

nominal load 1.7 A at 24 V DC 

Rated input power 41 W 

Backup energy for 

the event of 

power failure > 20 ms 

Fuse For each supply: subminiature fuse 

3.15 AT, soldered 

Output voltage 3.3 V DC (± 3%) typical 

5 V DC (± 3%) typical 

Output current 0.5 - 6.5 A to 3.3 V 

                      0.5 - 5.5 A to 5.0 V 

Current limit approx. 7.5 A 

Automatic return to normal operation after 

short circuit 

Total output power max. 35 W 

Weight 0.460 kg