discrepancy in documentation

Hi, 

I have chosen the 3RV2031-4KA10 circuit breaker for motor protection. I require an Undervoltage release of 24 V DC. Upon reviewing the accessories for the 3RV2031-4KA10, I came across the 3RV2902-1AB4. Everything seems to be in order, but I realized that the 3RV2902-1AB4 is intended for use with S0 and S00 size circuit breakers, whereas my 3RV2031-4KA10 is a size S2 breaker. I am unsure whether I can use the 3RV2902-1AB4 with the 3RV2031-4KA10 or not. Can somebody explain to me?