Description
Hard-Numbers: Technical Specifications
- Terminal Count: 32 points (circuits) .
- Connection Type: Screw-type terminals .
- Wire Gauge: #14-26 AWG, solid or stranded copper .
- Strip Length: 7.87 mm (0.310 in) maximum .
- Terminal Torque: 7 lb-in .
- Rated Voltage: 300V AC/DC .
- Current per Point: 10 A .
- Operating Temperature: -25°C to +70°C .
- Isolation Rating: Not a primary function of the terminal block itself; isolation is provided by the attached I/O module.
- Compatibility: Designed for high-density discrete I/O modules in the PACSystem RX3i and compatible 90-30 series .
- Construction: Two-part assembly (module cover and terminal board) made of flame-retardant plastic .
GE IC694TBB032
The Real-World Problem It Solves
This terminal base eliminates the mess of direct-wiring to fragile module pins. It turns a dense, error-prone bundle of wires into a organized, serviceable interface that can withstand vibration and repeated maintenance cycles.
Where you’ll typically find it:
- Mounted on a DIN rail inside a control cabinet, directly behind a GE RX3i discrete input or output module (like an IC694MDL740).
- In retrofit or upgrade projects where legacy 90-30 series I/O is being integrated with newer RX3i hardware .
- Any application requiring a high-density, reliable point of termination for sensors, switches, solenoids, or indicator lights.
It’s the unsung hero that keeps field signals clean and accessible, preventing downtime caused by broken module connectors.
Hardware Architecture & Under-the-Hood Logic
This is a passive mechanical and electrical interface. It has no microprocessor, logic, or active electronics. Its job is purely to bridge the gap between the outside world’s wiring and the controller’s brain.
- Field Wiring Entry: Field device wires (e.g., from a limit switch) are landed on the screw terminals, which are clearly numbered 1-32.
- Internal Connection: Each screw terminal connects to a robust, spring-loaded metal contact inside the base.
- Module Mating: When the corresponding I/O module (e.g., a 32-point digital input card) is snapped onto the base, its edge connector pins mate with these internal contacts.
- Signal Path Completion: This creates a continuous electrical path from the field device, through the terminal block, directly into the I/O module’s input or output circuitry.
The design prioritizes mechanical integrity and electrical continuity over any signal processing.
GE IC694TBB032
Field Service Pitfalls: What Rookies Get Wrong
Over-torquing the Terminal Screws
New techs crank down on these screws like they’re assembling an engine block. The specified 7 lb-in is surprisingly light. Over-tightening strips the brass threads or cracks the plastic housing, creating an intermittent connection that’s a nightmare to find.
- Field Rule: Use a calibrated torque screwdriver set to 7 lb-in. If you don’t have one, tighten until snug, then add only a quarter-turn more. The clamping force comes from the screw’s design, not brute force.
Ignoring the Wire Strip Length Gauge
The 0.310-inch strip length isn’t a suggestion; it’s critical. Too much bare wire can cause shorts against adjacent terminals. Too little means the screw clamps on insulation, leading to a high-resistance connection that fails under load.
- Quick Fix: Use the molded-in strip length guide on the bottom of the terminal block . Strip the wire, hold it against the guide, and cut off any excess bare conductor before insertion.
Assuming Universal Module Compatibility
Not every 32-point RX3i module fits this base. While designed for high-density discrete I/O, it may not be compatible with analog or specialty modules. Forcing an incompatible module can bend pins.
- Field Rule: Always cross-reference the module’s installation manual. The base part number (IC694TBB032) should be listed in the module’s “Compatible Accessories” or “Ordering Information” section before you install it.
Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.
