Six-channel analog current input architecture for Genius I/O installations, with individually isolated input circuits and current-loop excitation for 4–20 mA devices.
06
INPUT CHANNELS
4–20
mA SIGNAL
24/48
VDC POWER
SIGNAL PATH
FIELD DEVICE
↓
4–20 mA INPUT
↓
GENIUS I/O
ISOLATED CHANNEL ARCHITECTURE
POWER
18–56 VDC
INPUT
4–20 mA
CHANNEL STRUCTURE
6 isolated inputs
ENGINEERING DATA
Technical Specifications
Product Type
Current-Source Analog Input Block
Catalog Number
IC660BBA026
Rated Voltage
24/48 VDC
Operating Voltage
18–56 VDC
Input Channels
6
Input Range
4–20 mA; 0–25 mA capability
Resolution
1 µA at the applicable conversion setting
Channel Isolation
Six independent isolated input circuits
Conversion Time
Selectable up to 400 ms
Block Power
18–56 VDC, 600 mA maximum
Block-to-Block Isolation
1500 V for one minute
Heat Dissipation
12 W maximum
Operating Temperature
0°C to +60°C
CONTROL ARCHITECTURE
Six Independent Inputs
Each input circuit provides current-loop excitation and is electrically isolated from the other input circuits within the block. This arrangement is useful when field devices have separate signal paths or different electrical reference conditions.
Circuit scaling can be configured so controller data corresponds with application engineering units.
01
Current-loop excitation
Each input can supply loop power for connected current devices.
02
Configurable conversion
Conversion timing can be selected according to response and noise-rejection requirements.
03
Fault supervision
Input alarm limits and fault reporting can be configured for operating conditions.
04
Redundant bus support
A dedicated digital output can control a Bus Switching Module in redundant bus installations.
FIELD APPLICATION
Where IC660BBA026 Matters
The IC660BBA026 is suited to Genius I/O architectures where a controller must acquire multiple 4–20 mA process signals from field instruments. It is particularly relevant when a replacement is needed for a failed current-input block without changing the established six-channel signal architecture.
01
Process measurement
Interfaces with transmitters and other field devices delivering current-loop signals.
02
Maintenance replacement
Useful when an installed input block develops channel faults, communication faults, or loses reliable signal acquisition.
03
Downtime control
A failed analog input block can remove multiple process values from the controller, increasing the risk of interrupted operation or protective trips.
ENGINEERING & PROCUREMENT
Five Questions Before Replacement
01 / SELECTION
How does IC660BBA026 differ from IC660BBA025 when selecting a replacement?
The distinction is functional: IC660BBA026 is the six-channel current-source input block, while IC660BBA025 is the six-channel current-source output block. The replacement must match the direction of the field signal, not simply the 24/48 VDC supply rating.
02 / SIGNAL INTEGRITY
What should an engineer check if one channel reads incorrectly after replacement?
Check the field-loop wiring, channel configuration, scaling and conversion-time selection before treating the block itself as defective. Because each input is separately isolated, a fault confined to one field circuit does not automatically indicate failure of all six channels.
03 / SYSTEM MATCH
Why is the 24/48 VDC rating not enough to confirm interchangeability?
The power rating is only one selection criterion. Engineers must also verify that the installed block requires six analog current inputs, the Genius I/O architecture is compatible, and the field wiring matches the current-source input arrangement.
04 / PURCHASING
Which details should procurement confirm before placing a repeat order?
Confirm the exact catalog number, quantity, destination, required date and installed machine or system. For legacy Genius installations, confirming the existing block type is especially useful because visually similar analog blocks can perform completely different input or output functions.
05 / DOWNTIME RISK
What makes an IC660BBA026 failure more serious than a single sensor fault?
The block aggregates six analog input channels. A block-level failure can therefore affect several process values simultaneously, potentially preventing normal control decisions or triggering protective responses. For critical assets, identifying the exact replacement before shutdown can reduce troubleshooting time.
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Send These Five Details
01
Part Number
02
Quantity
03
Destination
04
Required Date
05
Machine / System
COMMERCIAL TERMS
Delivery
3–5 days
Warranty
12 months
Packaging
Brand New
Delivery Way
E-packing / FedEx / EMS / TNT / DHL / UPS
Payment Term
T/T
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