Overview

Current Source Input Blocks are designed to connect a controller with devices that output 4mA to 20mA analog signals. There are two types of Current Source Input Blocks available:

• 115VAC/125VDC Current-source Analog Input Block (IC66*BBA106)
• 24/48VDC Current-source Analog Input Block (IC66*BBA026)

These blocks are identical in functionality, differing only in their power supply requirements.

Specifications

Block Specifications

• Size (H x W x D): 8.83” (22.44 cm) x 3.56” (9.05 cm) x 4.42” (11.23 cm)
• Weight: 4 lbs. (1.8 kg)
• LED Indicators (I/O Block): Unit OK, I/O Enabled
• BSM Control Switches: One 24/48 VDC BSM (IC66*BSM021)
• Block to Block Isolation: 1500V for one minute
• Group to Group Isolation: 1500V RMS
• Heat Dissipation: 12 Watts maximum
• Block Power (Nominal):
  • 115VAC
  • 125VDC
  • 24/48 VDC

Power Supply Voltage

• Maximum Current:
  • 98-132 VAC: 250mA
  • 105-145 VDC: 140mA
  • 18-56 VDC: 700mA
• Frequency/Ripple:
  • 47-63 Hz
  • 10% max. ripple
• Power Supply Dropout Time:
  • 98-132 VAC: 1 cycle
  • 105-145 VDC: 10 ms min.
  • 18-56 VDC: 10 ms min.

Input Specifications

• Input Accuracy at 25°C: 0.1% of full-scale reading*
• Input Resolution: 1µA
• Input Conversion Time: 16.6ms to 400ms (user-selectable)
• Range: 4mA to 20mA
• Overrange Capacity: 0mA to 25mA
• Input Diagnostics: Underrange, Overrange, High Alarm, Low Alarm, Open Wire
• Channel to Channel Isolation: 1500V RMS
• Thermal Drift (from 25°C): 70 PPM per degree C (typical)
• Input Impedance: 100 Ohms ±5%
• Normal Mode Rejection: -45dB at 50/60Hz

Input Excitation Characteristics

• Open Circuit Voltage: 24VDC
• Short Circuit Current: <75mA
• Loop Impedance:
  • 1000 Ohms maximum (0mA to 20mA)
  • 800 Ohms maximum (20mA to 25mA)

Environmental Specifications

• Operating Temperature: 0°C to +60°C (+32°F to +140°F)
• Storage Temperature: -40°C to +100°C (-40°F to +212°F)
• Humidity: 5% to 95% (non-condensing)
• Vibration:
  • 5-10 Hz: 0.2” (5.08mm) displacement
  • 10-200 Hz: 1G