DS200RTBAG1A - Relay Terminal Board

DS200RTBAG1A - Relay Terminal Board DS200RTBAG1A - Relay Terminal Board

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Part Number: DS200RTBAG1A
Manufacturer: General Electric
Series: EX2000
Product Type: Terminal Board
Availability: In Stock
Product of Origin: U.S.A
Manual: GEI-100167B


DS200RTBAG1A is a Relay Terminal Board manufactured and designed by General Electric as part of the EX2000 Series used in Excitation Control Systems. The drive (or exciter) cabinet contains this optional board. Ten relays are provided by the RTBA board, and they can be operated either directly from the pilot relays on the 531X307LTB LAN I/O Terminal Board (LTB) or remotely by the user. The remaining three relays have four Form C contacts, while the remaining seven of the ten relays have two Form C contacts (DPDT relays) (4PDT relays). According to the group number, the three coil voltages for the relays on the RTBA board are as follows:

  • RTBAG1 - 110 V dc
  • RTBAG2 - 24 V dc
  • RTBAG3 - 115 V ac


RTBA Board Layout

Fig 1: RTBA Board Layout


The 10 relays are identified as K20–K29. Relays K20 through K26 are of the DPDT type, while K27 through K29 is of the 4PDT type (see Figure 1). The top of each relay, inside the relay's housing, includes an LED that shows when the relay is powered on. Metal oxide varistors with a 130 V ac voltage rating protect each relay's I/O. (MOVs). If necessary, each of the ten relays can be changed separately. The relay part numbers for each RTBA board group number are listed in Table 1.


RTBA Board Relay Part Numbers

Table 1: RTBA Board Relay Part Numbers



  • The RTBA board I/O is connected to the LTBA board through a 16-pin connector (RPL) and a 2-pin connector (OPTPL). Jumper selection controls which RPL connection signals can be used. For descriptions of RTBA board jumpers, see Table 2. For descriptions of the pin signals on the RPL connector.
  • To deliver control power to certain pluggable circuits, two stab connectors—CPH (control power hot, positive) and CPN (control power negative)—are available. These stab connectors have jumper selectable uses.
  • The RTBA board offers access to relays K27–K29 as well as pluggable circuits through connectors C1PL–C5PL and Y9PL–Y37PL. These pluggable circuits have jumper selectable control power sources.
  • At RTBA board terminals 1 through 52, I/O can be connected between the RTBA board relays K20 through K26 and external signals. These relays have a jumper for selecting the control power source.


Berg-type (manually moveable) hardware jumpers on the RTBA board, known by a JP designation, are present and must be properly configured for the application. Most jumper options are pre-set from the factory. The data sheets that come with each controller (found in the drive/exciter door pocket) list these factory default positions.

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What is DS200RTBAG1A?
DS200RTBAG1A is a Relay Terminal Board manufactured and designed by General Electric

What types of jumpers come with the DS200RTBAG1A?
Berg-type or manually movable hardware jumpers are included in the board. A JP nomenclature is used to identify the jumpers.

Are the relays protected?
Yes, 130 VAC metal oxide varistors safeguard each of the relay's input and output.

What is the number of relays on the board?
The LAN I/O Terminal Board features 10 relays, labeled K20-K29, that are operated either directly from the pilot relays on the LTB or remotely by the user. The coil voltages of the relays are 110 VDC.