The GE / Bently Nevada 1701/06 Isolator Terminal Base (ITB) is a signal conditioning interface module for the FieldMonitor™ Series and 3500 System machinery protection platforms. It enables intrinsically safe transducer installations in hazardous areas by galvanic isolation, eliminating external safety barriers when paired with the 170190 Dual Galvanic Isolator. The ITB mounts in non-hazardous or Division 2/Zone 2 environments while permitting connected transducers to operate in Division 1, Zone 1, or Zone 0 hazardous locations.
## Technical Specifications
• **Isolation Voltage:** 250 Vac continuous; 1500 Vac test
• **Power Input:** +19 Vdc to +33 Vdc
• **Power Dissipation:** 36 W at +24 Vdc (complete 4-monitor system configuration)
• **Operating Temperature:** −40°C to +85°C (−40°F to +185°F); −20°C to +70°C (−4°F to +158°F) ambient at modules
• **Storage Temperature:** −40°C to +85°C (−40°F to +185°F)
• **Housing Material:** Thermoplastic
• **Weight (base unit):** 1.6 kg (3.5 lb)
• **Dimensions (modules installed):** 12.7 cm × 20.32 cm × 50.80 cm (5 in × 8.0 in × 20.00 in)
## Key Features
• Screw terminals rated 12–22 AWG for signal I/O connections
• 8-conductor Euro terminal for single Keyphasor channel (16–18 AWG)
• Flexbus connector support for modular I/O expansion via Flex extender cables
• Coaxial output capability for signal transmission
• DIN rail (35 mm low-profile) or bulkhead mounting (6 × #10 bolts)
## Typical Applications
• Vibration monitoring in classified hazardous locations
• Transducer signal isolation and conditioning in industrial machinery protection systems
• Multi-sensor machinery condition monitoring with intrinsic safety compliance
## Compatibility & Integration
The 170190-01 Dual Galvanic Isolator pairs with 170133 and 170172 Internal Dual Proximitor sensors, standard Bently Nevada Proximitor, Velomitor, and accelerometer transducers using 170180 I/O modules. The 170190-02 variant accommodates CEC 4-131 and equivalent velocity transducers. CSA/NRTL/C hazardous area certification: Class I, Division 1, Groups A, B, C, D; Class I, Zone 1.
