Overview

Intermixed Systems:

The 1797-BIC and 1797-CEC bus isolator modules enable the configuration of FLEX Ex modules and FLEX I/O modules on a DIN rail, providing flexibility when they are connected to the same adapter and grouped appropriately on either side of the bus isolator module. This solution combines intrinsically safe and non-intrinsically safe systems, offering a cost-effective and versatile approach for system integration.

These intermixed systems can be configured for use in:

• Safe Areas: Similar to traditional IS and I/O systems.
• Hazardous and Safe Control Equipment: Where physical separation distance is minimal.
• FLEX Ex I/O with Communication Adapters: That are not intrinsically safe.

Specifications

• I/O Module Capacity:

  • Supports up to 8 FLEX Ex modules (1).

• Indicators:

  • Power Indicator: Green when power is applied.

• Isolation Path:

  • Flexbus to Flexbus: Galvanic isolation to DIN EN 60079-11 standards.
  • Flexbus Slave Side to Power Supply: Galvanic isolation to DIN EN 60079-11 standards.

• Power Requirements:

  • Power Supply Voltage: 18…32 V DC @ 0.15 A.
  • Max Input Voltage (Um): 253 V AC.
  • Power Dissipation: 2.1 W.
  • Thermal Dissipation: 7.2 BTU/hr.

• Intrinsic Safety Module Type:

  • [Ex ib] IIC certified.

• Conductor Wire Size:

  • Max 4 mm² (12 gauge) stranded.
  • Max 1.2 mm (3/64 in.) insulation.

• Weight:

  • Approx. 200 g.

• Environmental Conditions:

  • Operational Temperature: -20…70 °C (-4…158° F).
  • Storage Temperature: -40…85 °C (-40…185° F).
  • Relative Humidity: 5…95%, non-condensing.

• Shock Resistance:

  • Operating: 30 g peak acceleration, 11 (±1) ms pulse width.
  • Non-operating: 30 g peak acceleration, 11 (±1) ms pulse width.

• Vibration Resistance:

  • Tested at 5 g from 10…500 Hz, per IEC 68-2-6 standards.

Output Specifications (Intrinsically Safe)

• CENELEC Standards:

  • Uo: < 5.75 V DC.
  • Io: < 400 mA.
  • Po: < 2.05 W.
  • Lo: < 100 μH.
  • Co: < 39 μF.

• FM and cULus Standards:

  • Vt: < 5.75 V DC.
  • It: < 398.25 mA.
  • Ca: < 39.67 μF.
  • La: < 210 μH.

Dimensions

• Dimensions: 94 x 75 x 87 mm.