If you have questions about our products, Fill out the form below and we will answer any questions you have. Tips: Fields marked with*are required. ABB 89NU01D-E GJR2329100R0100 Voltage Monitoring Module Introduction The ABB 89NU01D-E GJR2329100R0100 is a voltage monitoring module engineered for continuous supervision of supply conditions within ABBs legacy and transitional control systems. From a field-maintenance standpoint, this module p *Your Name: *Your Email: *Your Name: *Vdcode: Submit