Description
IC693MDL648 Product Overview
The IC693MDL648 is a 16-point discrete input module that plugs into any I/O slot of a GE Series 90-30 PLC rack. It is purpose-built to bring 48 VDC field signals—typically from contactors, limit switches, or proximity sensors—into the CPU without external signal conditioning.
The IC693MDL648 is a 16-point discrete input module that plugs into any I/O slot of a GE Series 90-30 PLC rack. It is purpose-built to bring 48 VDC field signals—typically from contactors, limit switches, or proximity sensors—into the CPU without external signal conditioning.
Within the control architecture the card sits at the “field-status” layer: each input presents a 4.2 mA load and accepts 0–60 VDC, allowing direct connection to both sourcing (PNP) and sinking (NPN) devices. The 1 ms input filter suppresses contact bounce and inductive spikes common in 48 VDC circuits, while 1500 V optical isolation keeps the 5 V logic side safe from ground-shift events. A front-panel green LED shows module health, and individual bit status is reported to the CPU each scan.
Being part of the Series 90-30 family, the module is hot-swappable, auto-configured by the CPU, and shares the same terminal-block style as other 16-point 90-30 I/O, so plant stores can standardise on one cable and one spare.
IC693MDL648
Technical Specifications
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Model Number: IC693MDL648
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Manufacturer: GE / Emerson
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Product Type: Discrete Digital Input Module
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Channels: 16 single-ended, one common group
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Rated Voltage: 48 VDC
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Input Voltage Range: 0–60 VDC
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Input Current: 4.2 mA per point @ 48 VDC
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Logic Compatibility: Positive or negative logic (high-true or low-true)
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Filter Time: 1 ms (typical)
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Isolation: 1500 V optical between field and logic
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Power Consumption: 90 mA from +5 V backplane
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Connectors: Requires IC694TBBxxx or IC694TBSxxx terminal block (sold separately)
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Temperature: 0–60 °C operational; –40–+85 °C storage
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Weight: ≈0.2 kg (0.4 lb)
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Agency Approvals: UL, CE, ATEX Zone 2, ABS, BV, DNV-GL
IC693MDL648
Core Features & Customer Value
48 VDC rated inputs – Accepts both 24 V and 48 V field devices without external resistors, ideal for older plants where 48 V battery systems are still in use.
48 VDC rated inputs – Accepts both 24 V and 48 V field devices without external resistors, ideal for older plants where 48 V battery systems are still in use.
Positive/negative logic selectable – High-true or low-true wiring is accepted without jumper changes, allowing the same card to monitor both sourcing and sinking sensors.
1 ms input filter – Suppresses contact bounce and inductive spikes from contactors or proximity switches, keeping the CPU scan free of false transitions.
1500 V isolation – Optical isolation between field and logic prevents ground-shift damage when 48 V and 5 V systems share a common reference.
Hot-swap & auto-configure – Module can be inserted or removed while the rack is powered, and the CPU automatically recognises range and fault status—no DIP switches to set.
Typical Applications
In combined-cycle power plants the IC693MDL648 is installed in the “discrete input” section of Series 90-30 racks that monitor 48 VDC auxiliary contacts, cooling-fan status, and fire-protection damper position. The 1 ms filter keeps the turbine-control loop free of contact bounce, while the 48 V rating matches the plant’s legacy battery systems.
In combined-cycle power plants the IC693MDL648 is installed in the “discrete input” section of Series 90-30 racks that monitor 48 VDC auxiliary contacts, cooling-fan status, and fire-protection damper position. The 1 ms filter keeps the turbine-control loop free of contact bounce, while the 48 V rating matches the plant’s legacy battery systems.
In pipeline compressor stations the same module reads 48 VDC status from auxiliary pumps, valve limit switches, and local E-stop buttons, using the high-density layout to minimise marshalling cabinet footprint.
Because the card is certified for Zone 2 and marine environments, it is also used on off-shore platforms for well-head valve position and local control-panel push-buttons without needing additional isolation relays.
