https://microengine.atlassian.net/wiki/spaces/MKB/pages/131760298/How+to+Connect+2+Units+XP-GT3500+Controller+and+Door+Accessories+with+MAS-RBM+for+Single+Door+Access+with+Fingerprint+Reader+on+Both+Entry+and+Exit+Directions
How to Connect 2 Units XP-GT3500 Controller and Door Accessories with MAS-RBM for Single Door...