Description
The GE Security (Interlogix / IFS) D7120WDMB is an environmentally hardened 10/100 Mbps Ethernet optical transceiver engineered to transmit and receive data over a single multi-mode optical fiber utilizing Wavelength Division Multiplexing (WDM). It is specifically designed to pair with a matching “A-End” unit (such as the D7120WDMA) for secure, long-distance industrial surveillance and traffic monitoring networks.
📋 Technical Specifications Datasheet
- Brand: GE Security / Interlogix (IFS Transmission Series)
- Model: D7120WDMB (B-End Module)
- Series: D7100 Series Ethernet Transceivers
- Product Name: 1-Channel 10/100 Mbps Ethernet Optical Transceiver
- Manufacturing Origin: United States / Global
- Product Status: Industrial Security & Traffic Standard / Legacy System
- Data Rate: 10/100 Mbps (Auto-negotiating, Full/Half Duplex)
- Optical Wavelength: 1550/1310 nm (WDM single-fiber operation)
- Optical Connector: Standard ST connector
- Power Supply Rating: 12 VDC surface mount or rack backplane powered (draws ~200 mA)
- Operating Temperature Range: -40°C to +74°C (Environmentally hardened for extreme conditions)
⚙️ Operating Norms and Usage
- Handle the transceiver card with proper electrostatic discharge (ESD) precautions, using a grounded wrist strap if extracting or inserting into a rack enclosure.
- Mount the unit either as a standalone surface-mount module or inside a compatible hot-swappable equipment rack chassis.
- Verify that the fiber optic patch cable is clean, properly mated to the ST port, and paired correctly with its corresponding WDMA unit (WDM requires matching A and B ends).
⚡ Power-On / Power-Off Sequence
- Power-On Sequence: Confirm Ethernet and optical fiber connections are secure, energize the 12 VDC power supply or rack backplane, and check that the power and data LEDs indicate an active link and carrier lock.
- Power-Off Sequence: Disconnect network data traffic if necessary, power down the 12 VDC supply source, and disconnect terminal or fiber interfaces safely before module extraction.
📖 Product Usage Instructions
- Monitor the front-panel LED indicators (Power, Transmitting, and Receiving) to instantly verify network communication and link integrity.
- Take advantage of the plug-and-play design—no in-field optical or electrical adjustments are required for setup.
- Ensure NTCIP compliance configuration is maintained if deploying the transceiver within intelligent transportation systems (ITS) or traffic signal control networks.
❓ Common Questions & Answers Q&A
- Q: Why are there “A” and “B” versions (WDMA and WDMB) of this transceiver?
A: They use Wavelength Division Multiplexing (WDM) to transmit and receive bidirectional data over just one single fiber strand; WDMA and WDMB must be paired together at opposite ends of the fiber link because they operate on complementary optical frequencies.
- Q: What does the network link indicator light signify if it remains unlit?
A: An unlit link/data LED typically indicates a break in the fiber strand, incorrect fiber pairing (e.g., matching a WDMA with another WDMA instead of a WDMB), or an unplugged RJ-45 Ethernet cable.
Recommended Alternative Series & Models
- GE Security Transceiver: D7120WDMA (Matching A-End Unit)
- GE Security Transceiver: D7130WDMB (Single-mode long-range version)
- GE Video Transmitter: VT1930WDM
- GE Fiber Receiver: VR1930WDM
- GE Multilin Relay: SR750-P1-G1-S1-HI-A20-R-E-H
- GE Mark VIe Module: IS420UCSCH1A
- GE Drive Board: 531X301DCCAFG2
- GE Terminal Board: 531X305NTBAPG1
- GE Voltage Board: DS200NATOG1A
- GE Auxiliary Board: DS200ADGIH1AAA
