- Inputs 1–8 and 9–16 form separate electrical groups.
- Each group may use positive or negative logic independently.
- Supported voltage levels can differ between the two groups when the field supplies are wired correctly.
GE Fanuc IC670MDL643 5/12 VDC Positive/Negative Input Module
A sixteen-point low-voltage DC input module arranged as two independently wired groups of eight.
Low-voltage positive/negative input module162 groups of 85/12 VDC
Product identity
Model Profile
GE Fanuc IC670MDL643 is a sixteen-point Field Control input module for 5 VDC and 12 VDC logic signals. The channels are divided into two groups of eight, giving the station a low-voltage input option for electronic devices and short-distance control signals.
Each eight-point group can be wired for positive or negative logic. The two groups can also use different supported voltage levels, allowing one module to accommodate, for example, a 5 V group and a 12 V group when their commons remain separated.
The module filters and optically isolates the incoming states before placing sixteen bits of data in the BIU input image. Point LEDs and a power indicator support local checks during commissioning.
Model values
Product Data
- Product type
- Low-voltage positive/negative input module
- Input points
- 16
- Group arrangement
- 2 groups of 8
- Rated voltage
- 5/12 VDC
- Input range
- 0–15 VDC
- Typical input current
- 5 mA at 5 VDC; 15 mA at 15 VDC
- Positive ON range
- +3.6 to +15 VDC
- Negative ON range
- −3.6 to −15 VDC
- Group isolation
- 150 VAC continuous
- BIU current draw
- 80 mA maximum
Hardware function
Two-Group Flexibility
Selection detail
Low-Voltage Signal Integrity
- Account for conductor voltage drop because the guaranteed ON threshold begins at 3.6 V.
- Keep each group common isolated from the other when different supplies are used.
- Check sensor leakage against the OFF threshold before commissioning.
Buyer decisions
Technical Questions
Can one IC670MDL643 use 5 VDC inputs and 12 VDC inputs together?
Yes. The two eight-point groups can use different supported voltage levels with separate group wiring.
Can IC670MDL643 mix positive and negative logic?
Yes, between the two groups; all points inside one eight-point group use the same convention.
Why is cable voltage drop important for IC670MDL643?
Low-voltage circuits have less margin, and the active signal must still reach the specified ON threshold.
Is IC670MDL643 a 24 VDC input module?
No. It is specified for 5/12 VDC signals with a 0–15 VDC input range.
What should be specified when ordering IC670MDL643?
Record the voltage and polarity used by each eight-point group plus the installed terminal-base style.
How many input bytes does IC670MDL643 occupy?
The sixteen input states use two bytes in the Field Control station data.
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