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The GE IC694MDL758, also cataloged as the IC694MDL758 Discrete Output Module, operates as a dedicated hardware component for solid-state switching of low-voltage direct current loads within PACSystems RX3i networks.

Hardware Specifications

Parameter Specification
Model IC694MDL758
Brand GE Fanuc / Emerson
Origin Factory standard
Weight 1.36 kg (3.00 lbs)
Dimensions Single-slot chassis occupancy
Operating Temp 0 to 60 deg C
Power Consumption 250 mA maximum at 5.0 VDC (from backplane bus)
Channel Density 32 discrete outputs
Output Grouping 2 isolated groups (16 channels per group)
Output Logic Type Positive logic (Sourcing)
Rated Operating Voltage 12 / 24 VDC
Output Voltage Range 10.2 to 28.8 VDC
Output Current per Point 0.5 A maximum
Output Current per Group 8.0 A maximum
Inrush Current Rating 5.4 A for 10 ms (without an ESCP trip)
Maximum Response Time 0.5 ms
Isolation Galvanic group-to-group isolation
Status Indicators 32 green channel LEDs, 2 fault LEDs, 1 module status LED
Compatible Terminal Blocks IC694TBB032 (box-style) or IC694TBS032 (spring-style)
System Compatibility PACSystems RX3i CPU slots only (Incompatible with Series 90-30)

Deterministic Networks and I/O Density Scaling

The module executes discrete automation routines by shifting 32 solid-state sourcing outputs across the local PACSystems RX3i parallel backplane. To maintain deterministic networks performance when scaling high-density electronic modules inside the chassis, the device draws a constant 250 mA from the 5.0 VDC backplane bus. Built-in electronic short-circuit protection (ESCP) monitors the physical circuit loops across each group common. If a localized short-circuit occurs, the ESCP infrastructure isolates the fault, bounds the internal thermal heat sink dissipation profile, and routes a digital diagnostic error frame directly to the master CPU without disrupting backplane bus communication velocity.

Frequently Asked Questions

Q: Does this module support live insertion and extraction (hot-swapping) during controller operation?

A: Yes. The PACSystems RX3i system architecture permits hot-swap execution of this module, provided the technician complies with the grounding practices, backplane capacity limits, and mechanical extraction guidelines specified in the RX3i installation manual.

Q: How does the module handle a sudden loss of field-side supply voltage within an output group?

A: The hardware logic incorporates diagnostic sub-circuits that detect the loss of external field power for each of the two isolated groups. Upon detection, it toggles a dedicated fault LED indicator on the front panel and generates a structured fault report for transmission to the RX3i controller.

Q: Is this module backward compatible with older Series 90-30 PLC backplanes?

A: No. The firmware and electrical interface of the module are designed exclusively for the PACSystems RX3i platform. It cannot be mapped or installed within a Series 90-30 chassis.

Field Installation Guidelines

  • Isolate all external direct current field loop power supplies and backplane inputs before initiating terminal connections or module placement.
  • Match the structural enclosure of the module with the precise physical slot paths of the target RX3i baseplate.
  • Push the module firmly into the slot until the upper and lower plastic locking tabs click onto the chassis rail hooks.
  • Seat either the IC694TBB032 box-style or IC694TBS032 spring-style 32-point terminal block into the front faceplate connection pins.
  • Lay all low-voltage 12/24 VDC sourcing signal lines in segregated cable trays positioned at a minimum distance of 30 cm from high-power AC lines or motor control conductors to minimize electromagnetic interference.

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