General Electric 531X305NTBANG1 NTB/3TB Terminal BoardDescription Model: 531X305NTBANG1 Type: NTB 3TB Terminal Board Series: 531X Specifications Regulated Power Supplies: 5VDC and 15VDC Unregulated Power Supplies: 24VDC or 125VAC Relay Outputs: 7 relay outputs (Form A or Form C), with contacts rated at 120VAC Analog I O: Low level analog I O can be scaled using four onboard potentiometers Encoder Configuration: Supports 5V and 15V encoders, configurable via onboard jumpers Dimensions: 22. 44 cm x 8. 89