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SPECIFICATIONS:
Part Number: IS200TDBSH2ACC
Manufacturer: General Electric
Series: Mark VI
Product Type: Simplex Analog Input/Output Terminal Board (TDBSH2ACC)
Technology: Surface mount
Mounting: DIN-rail
Contact Inputs: 24 group-isolated inputs
Input Voltage: 24 V DC (16–32 V DC)
Relay Current Rating: 5 A per relay
Relay Voltage Clearance: 250 V AC
Option Cards: JW1 and JW2 connectors
Input Protection: Noise Suppression
Relay Outputs: 12 Form-C relays
Wetting Voltage Connector: JE1 3-pin Mate-N-Lok
Operating temperature: 0 to 60°C
Size: 8.6 cm wide x 16.2 cm high
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721D
FUNCTIONAL DESCRIPTION:
IS200TDBSH2ACC is a Simplex Analog Input/Output Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The TDBSH2ACC board is a simplex contact input/output terminal board designed for DIN-rail or flat mounting. The TDBS board accepts 24 group isolated contact inputs that are supplied with a nominal 24, 48, or 125 V dc wetting voltage from an external source. The contact inputs have noise suppression to protect against surges and high-frequency noise. TDBSH2ACC provides 12 form-C relay outputs and accepts different option cards to expand relay functions. In the Mark VIe systems, the PDIO I/O pack works with the TDBS. The I/O pack plugs into the D-type connector and communicates with the controller over Ethernet. A single connection point for PDIO is provided, with one or two network connections possible from PDIO to the controllers.
INSTALLATION:
The TDBSH2ACC, plus a plastic insulator, mounts on a sheet metal carrier that then mounts on a DIN rail. Optionally, the TDBS plus insulator mounts on a sheet metal assembly that then bolts into a cabinet. The connections are wired directly to two sets of 48-point terminal blocks, typically using #18 AWG wires. The upper set of terminals, TB1, connects to the relay portion of the board, and the lower set of terminals, TB2, connects to the contact input circuits. Screw assignments for the two sets of terminals are identical to those found on the SRLY relay board and the STCI contact input terminal board. Shields should be terminated on a separate bracket. If a relay option board is used, it plugs onto TDBS connectors JW1 and JW2 and is held in place by the force of the connectors. The following table identifies the function of each relay terminal point grouped as TB,1, as it relates to the presence of an option board. If external power is to be supplied, it is wired to a connector provided on the option board.
Contact input connections are made to the 48 terminals on the lower portion of the terminal board, grouped as TB2. Contact wetting voltage is provided to the board through the JE1 3-pin Mate-N-Lok connector on the lower portion of the board. The wetting voltage output terminals are all connected in parallel and fed from the positive voltage applied to JE1 pin 1. It is permissible to run a single wetting voltage lead from the board terminal to a group of remote contacts and then bring the individual contact wires back to the inputs. Negative or return wetting voltage is supplied by JE1 pin 3.
OPERATION:
The contact input function and on-board signal conditioning are the same as those on STCI; they are scaled for 24, 48, and 125 V dc wetting voltage. The input wetting voltage range is 16 to 32 V dc, 32 to 64 V dc, and 100 to 145 V dc, respectively. The threshold voltage is 50% of the wetting voltage. The contact sensing circuits are shown in the I/O pack description. Contact input currents are resistance-limited to 2.5 mA on the first 21 circuits, and 10 mA on circuits 22 through 24. The 24 V dc supply on TDBSH2 is current-limited to 0.5 A using polymer positive temperature coefficient fuses that can be reset. Filters reduce high-frequency noise and suppress surge on each input near the point of signal entry. The discrete input voltage signals go to the I/O processor, which passes them through optical isolators, converts them to digital signals, and transfers them to the controller.
RELAY OUTPUTS:
TDBSH2ACC uses pluggable type terminals and has connectors JW1 and JW2 supporting the option board connection. The relay portion of TDBSH2ACC does not change between groups H2, H4, and H6; only the contact input circuits change. TDBSH2ACC relays may be used at any specified AC or DC voltage without regard to board group. Electrically, TDBS has the following circuit for each of the 12 relays. Without an option board, the SOL terminal associated with each relay has no connection. TDBS is designed to support a current rating of 5 A and voltage clearance greater than is needed for 250 V ac on all customer screw and JW1 circuits. The relay rating is the limiting item for each application.
WOC is your trusted partner for GE Distributed Turbine Control Systems, offering the largest inventory of genuine OEM replacement parts to ensure seamless operation and minimal downtime. In addition to supplying high-quality new and rebuilt boards, we provide comprehensive repair services for faulty or damaged components, all backed by a robust warranty for your peace of mind. Our team of seasoned technical experts is available around the clock, delivering professional guidance, troubleshooting, and tailored solutions to meet your OEM and automation requirements. Whether you need immediate repairs, system upgrades, or assistance sourcing rare parts, we ensure your turbines and control systems perform reliably and efficiently. For detailed pricing, availability, or support, please reach out to us via phone or email. We are ready to assist whenever you need.
What is the IS200TDBSH2ACC?
The IS200TDBSH2ACC is a simplex analog input/output terminal board from General Electric Mark VIe Series, used in GE Distributed Control Systems. It supports 24 isolated contact inputs and 12 Form-C relay outputs, providing reliable signal interfacing for turbine control applications. The board also allows optional expansion through plug-in option cards.
What voltages does the TDBSH2ACC board support?
The board accepts 24, 48, or 125 V DC wetting voltages from an external source. Input voltage ranges are 16–32 V DC, 32–64 V DC, and 100–145 V DC, respectively, with a threshold voltage of 50% of the wetting voltage. Each input includes surge suppression and noise filtering for reliable operation.
How are the relay outputs used?
The TDBSH2ACC provides 12 Form-C relays capable of switching AC or DC loads up to 5 A, with voltage clearance exceeding 250 V AC. Relays can operate independently or be expanded using option boards via JW1 and JW2 connectors. SOL terminals provide return paths for solenoid circuits when option boards are installed.
How is the TDBSH2ACC board installed?
The board mounts on a DIN rail or flat surface using a plastic insulator and sheet metal carrier, or directly inside a control cabinet. Connections are made via two 48-point terminal blocks: TB1 for relays and TB2 for contact inputs. Shields should be terminated separately to prevent electrical interference.
