[en] In TRISTAN accumulation ring (AR), electrons and positrons are acceralated up to 8 GeV, then extracted, transported and injected to main ring (MR). Slow bump and fast bump magnets are used to generate a closed bump orbit for the extraction and injection. A BRG CAMAC module was developed in order to control the power supply for the slow bump magnet. The fall time ( = rise time) and the flat-top time of the ramp pulse can be changed in the range of 0.1 to 150 sec and of 0.1 to 1500 sec by CAMAC command (F(17)), respectively. The outputs of the ramp pulse generator are bipolar (-10.240 V ∼ +10.235 V) and have accuracy of ± 2.5 mV. One can use either CAMAC command (F(25)) or a external timing pulse for the trigger of this ramp pulse. The timing jitter on the start trigger is less than 150 nsec. (author)