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 Ohms
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 Days
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 Simplex Contact Input with Point Isolation terminal board provides 16 point-isolated voltage detection circuits to sense a range of voltages across relay contacts, fuses, switches, and other contacts. IS230SDIIH1A 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 48 V dc, 125 V dc, 115 V ac rms, and 230 V ac rms. If PDII is used with SDII only, then all 16 channels are point-isolated. 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 the contact as on or off. Each input is isolated from the others. 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 the positive, and pin 3 should be connected to the 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.

WOC maintains the largest inventory of GE Distributed Control System (DCS) replacement parts, including both unused and fully rebuilt components, all supported by a dependable warranty. In addition to supplying high-quality parts, our team of experienced automation specialists provides 24/7 technical support, offering guidance on installation, configuration, diagnostics, and system troubleshooting to ensure seamless and reliable operation. We also deliver expert repair services for faulty modules, helping minimize downtime and maintain optimal system performance. Whether you need replacement components, repairs, or professional advice on your DCS setup, our specialists are ready to provide prompt, efficient, and dependable solutions to keep your control systems running at peak efficiency.

FREQUENTLY ASKED QUESTIONS:

What is the IS230SDIIH1A?

The IS230SDIIH1A is a Simplex Contact Input with Point Isolation Terminal Board for GE Mark VIe DCS. It detects voltage across relays, switches, and fuses, converting them into isolated digital signals for reliable monitoring and control.

How many channels does it support?

It provides 16 point-isolated channels, each capable of sensing multiple voltage levels. Optional WDIIH boards can convert point-isolated channels to system-wetted or group-isolated channels as required.

How does the module detect input status?

The SDII senses the voltage at each input, converts it to an isolated digital signal, and determines whether the contact is on or off. Each channel is electrically isolated for accurate and safe detection.