IS230SDIIH1A - Simplex Contact Input with Point Isolation Terminal Board

SPECIFICATIONS:

Part Number: IS230SDIIH1A
Manufacturer: General Electric
Series: Mark VIe
Product Type: Simplex Contact Input with Point Isolation Terminal Board
Number of channels: 16
Voltage Range: 14 to 32 V dc
Maximum Lead Resistance: 15 Ω
Outputs: 24 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating Temperature: -30 to 65°C
Size: 15.9 cm high x 17.8 cm
Repair: 3-7 Day
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
Manual: GEH-6721L

FUNCTIONAL DESCRIPTION:

IS230SDIIH1A is a Simplex Contact Input with Point Isolation Terminal Board manufactured and designed by General Electric as part of the Mark VIe Series used in GE Distributed Control Systems. The Contact Input with Point Isolation (SDII) terminal board provides 16-point isolated voltage detection circuits to sense a range of voltages across relay contacts, fuses, switches, and other contacts. IS200SDIIH1 has pluggable Euro-style box-type terminal blocks and a connector that accepts different option boards. Three terminals are provided for each contact input channel. Each channel can accept different voltage levels as follows: 24 V dc/ 48 V dc/ 125 V dc/ 250 V dc/ 115 V ac rms / 230 V ac rms. If PDII is used with SDII only, then all 16 channels are point-isolated channels.

Three types of WDII option boards connect to the SDII system. When a WDII option board is connected, the point-isolated channels become group-isolated channels, with the system wetting voltage provided through the WDII. WDII boards include an isolated voltage detector circuit, similar to the one in SDII, to monitor the wetting voltage.

• WDIIH1 Option Board: This board allows all 16 channels to be system-wetted with 24 V DC, 115 V AC RMS, or 230 V AC RMS. Each channel can be individually configured as point-isolated, with the ability to accept different voltage levels as needed. This setup allows for a combination of point isolation and group isolation.

• WDIIH2 Option Board: This board enables system wetting with 48 V DC across all 16 channels. Each channel can be individually configured as point-isolated, with the ability to accept different voltage levels as required. A mix of point isolation and group isolation is also possible.

• WDIIH3 Option Board: This board only supports system wetting with 125 V DC. It does not allow any channels to be configured as point-isolated. All channels are group-isolated.

OPERATION:

The SDII provides a sensing circuit, which converts the voltage present at the TB input to an isolated digital signal. Using the isolated signal, the firmware calculates the voltage present at the TB input. Based on the presence and absence of voltage at the TB input, it declares the status of contact as on or off. Each input is isolated from each other. If SDII is used without an optional board, all the inputs are point-isolated as well as system-isolated. If SDII is used with optional board WDIIH1, channels can be system wetted with 24 V dc / 115 V 50/60 Hz ac rms / 230 V 50/60 Hz ac rms based on the TB points used for field wire terminations and the channel configuration setting through the ToolboxST application. The frequency range for AC 50 Hz and 60 Hz is ±3 Hz. System wetting requires that the respective channel fuse be present on WDII. Removal of the fuse allows the use of the input as a point-isolated signal path.

GROUP ISOLATED INPUT SIGNALS:

The contact input channels can be provided with wetting voltage through a WDII option board. Along with the system wetting, WDIIH boards offer field line fault monitoring with the addition of one or two resistors connected in the field near the contact. WDII boards have an isolated voltage detector circuit similar to SDII to monitor the wetting voltage. WDIIH1A is capable of providing 115 V/ 240 V ac rms, 50/60 Hz, and 24 V dc wetting voltage with individual fuses in each supply line. The wetting voltage is connected through JE1 or JE2 parallel connectors. Pin 1 of JE1 should be connected to positive and pin 3 should be connected to negative. PDII can be configured to detect open field wiring or an open fuse on WDII with the addition of one resistor in parallel with the contact being sensed. Reversal of polarity at JE1/ JE2 is not desired.

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FREQUENTLY ASKED QUESTIONS:

What is a Simplex Contact Input with Point Isolation Terminal Board?

A Simplex Contact Input with a Point Isolation Terminal Board is used to interface between input contacts and the control system, ensuring that each input is electrically isolated. This provides protection from voltage spikes, electrical noise, and ground loops.

How does point isolation work in this terminal board?

Point isolation ensures that each contact input is electrically isolated from others and the rest of the system. This isolation is achieved through the use of optocouplers, transformers, or similar technologies, which protect the system from interference or damage caused by voltage fluctuations.

Can the terminal board support multiple voltage levels?

Yes, depending on the model, the terminal board can support different voltage levels for point-isolated inputs, such as 24 V DC, 48 V DC, or 125 V DC. Each input channel can be individually configured to accommodate different voltage levels as needed.