The DS200RTBAG2AFB is a relay terminal board designed for General Electric’s Mark V board series

The DS200RTBAG2AFB is a relay terminal board designed for General Electric’s Mark V board series
​DS200RTBAG2AFB technical specification
​Part number: DS200RTBAG2AFB
Series Mark V DS200
Manufacturer: General Electric Board and turbine control
Functional acronym/abbreviation: RTBA
Function Description: Relay terminal board
Group change: G2 series
Power Supply: 24 volts DC
Relay names: K20-K26 and K27-K29
​About DS200RTBAG2AFB

The DS200RTBAG2AFB is a relay terminal board (RTBA) designed for General Electric’s Mark V board series. The board can be used in multiple GE branded drive and exciter applications. By mounting the board into the drive cabinet, an additional 10 relays can be provided to the user. Both the LAN I/O terminal module and the remote user can drive the relays on this board. This DS200RTBAG2AFB relay terminal board or relay terminal board assembly is not an original product manufactured for General Electric’s Mark V Series turbine control systems; This will be the original DS200RTBAG2 relay terminal board, missing three important product revisions of this PCB.
​Hardware tips and specifications
​As a Mark V series product, this DS200RTBAG2AFB relay terminal board assembly is required to include a specific series of hardware components and hardware component specifications. Positions K20 to K29 are board positions for all on-board relays. The DS200RTBAG2AFB includes two types of relays, the Mark V Series relays with DPDT and 4PDT styles. The DPDT type consists of seven relays on the card, including K20 to K26. These types have two C-type contacts, each rated 10A. K27 to K29 are the relays on this printed circuit board and are classified as the second relay type 4PDT. Instead of two contacts, 4PDT relays consist of four type C contacts, each with a current rating of 1A. All ten points are protected by a 130 VAC metal-oxide varistor (MOV). Each relay contains an internal 110 VDC coil that ensures their proper operation. If any of the relays stop operating or are damaged, the user can easily remove and replace all ten points.
​The DS200RTBAG2AFB model uses two connectors; One is a 16-pin connector and the other is a 2-pin connector. 16-pin connectors are labeled RPL and 2-pin connectors are labeled OPTPL. OPTPL connectors have two additional diagnostic nomenclature; X2 and CFX1. The X2 nomenclature sends the signal back to the CFX1 nomenclature for an NTB/3TB board with a 120 VAC load. This naming is the same as the RPLX2 naming. For all the nomenclature available for the two connectors, see Tables 3 and 4 in the GEI-10016B manual, which is included in the manual TAB above.
​FAQ about DS200RTBAG2AFB
Is every pin in the 16-pin (RPL) connector connected when used on DS200RTBAG2AFB models?
​Nooooo. The pins that are always connected on the RPL connector are pins 1, 3, 5, 7, 9, 11, 13, and 15. Each pin has a separate nomenclature and a separate description. For example, pin 13 is called the RX6 nomenclature. The RX6 nomenclature is described as a pilot input to the LTB for relay K25 on RTBA models. For additional nomenclature and instructions, see Table 3 on page 5 of the GEI-100167B manual.
How many connections are available on the DS200RTBAG2AFB model?
​DS200RTBAG2AFB model has 52 connection points. Each endpoint has its own nomenclature and description. An example of naming and describing is terminus XXvii. The nomenclature for Terminal 27 is K232CM, describing the trunk K23 Form C contact number 2. For more information on all nomenclature, connection points, and descriptions, see the GEI-100167 manual.