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
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