Typical pin out configurations are as designated below:

DMX XLR 5-pin
1-Ground
2-Data 1 (-) (Primary data link)
3-Data 1 (+) (Primary data link)
4-Not typically used (can be used as a secondary data link as the negative terminal)
5-Not typically used (can be used as a secondary data link as the positive terminal)

DMX XLR 5-pin
1-Ground
2-Data 1 (-) (Primary data link)
3-Data 1 (+) (Primary data link)

DMX RJ-45 Connector
1-Data 1 (+)
2-Data 1 (-)
3-Data 2 (+)
4-Not assigned
5-Not assigned
6-Data 2 (-)
7-Signal ground for Data 1
8-Signal ground for Data 2