- Each half of the block terminates thermocouples for one input module.
- A built-in thermistor measures local terminal temperature for compensation.
- Cable connections carry channel and thermistor signals to the module base.
GE Fanuc IC670CHS004 Field Control Thermocouple Terminal Block
A dedicated thermocouple terminal block with two built-in thermistors for local reference-junction compensation.
Thermocouple terminal blockLocal reference-junction compensation2 thermistors2 thermocouple input modules
Product identity
Model Profile
GE Fanuc IC670CHS004 is the Field Control thermocouple terminal block. It provides screw terminals for thermocouple field wiring and two built-in thermistors that supply local reference-junction temperature information for connected thermocouple input modules.
The block supports two thermocouple modules. Each module remains installed on a separate Field Control I/O base, while cables connect the thermocouple terminal block to the module-side terminal assignments.
Using IC670CHS003 as the module base gives the simplest connector-to-connector arrangement. The thermocouple block must be mounted on a grounded conductive DIN rail so its base-cover assembly is bonded to chassis ground.
Model values
Product Data
- Product type
- Thermocouple terminal block
- Compensation
- Local reference-junction compensation
- Built-in sensors
- 2 thermistors
- Supported module connections
- 2 thermocouple input modules
- Field connection
- Thermocouples to screw terminals
- Preferred module base
- IC670CHS003 connector-style base
- Mounting requirement
- Grounded conductive DIN rail
- Station family
- Field Control
Hardware function
Reference-Junction Layout
Selection detail
Thermocouple Wiring Discipline
- Maintain thermocouple alloy continuity and polarity through the field terminals.
- Keep the terminal block away from uneven heat sources that can create junction-temperature gradients.
- Bond the block through a grounded conductive DIN rail as required.
Buyer decisions
Technical Questions
Why use IC670CHS004 instead of wiring thermocouples directly to the I/O base?
It adds built-in local reference-junction sensors and keeps thermocouple connections away from module heat.
How many thermocouple input modules can IC670CHS004 serve?
The terminal block is arranged for two thermocouple modules.
Which Field Control base gives the simplest connection to IC670CHS004?
IC670CHS003 provides connector-to-connector cabling to the thermocouple module.
Why must IC670CHS004 be installed on a conductive DIN rail?
The grounded rail bonds the terminal-block base-cover assembly to chassis ground.
What can cause temperature error after replacing IC670CHS004?
Reversed polarity, mixed extension-wire alloys, poor grounding or a temperature gradient across the reference junction can shift readings.
What should be included in an IC670CHS004 enquiry?
Provide the thermocouple module model, sensor types, channel count, cable arrangement and mounting environment.
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