| KT4 Series |
| Base model | Power supply | Sensor input | Control output | Alarm output | Heating/ cooling control | Heater burnout alarm | Communications function | Description |
| AKT4 | | | | | | | | 48×48×95mm |
| | 1 | | | | | | | 100 to 240V AC |
| 2 | | | | | | | 24V AC/DC |
| | 1 | | | | | | Multi-input (Thermocouple, RTD, DC Voltage and DC Current) |
| | 1 | | | | | Relay contact output 1a 3A 250V AC |
| 2 | | | | | Non-contact voltage output (for SSR drive) |
| 3 | | | | | Current output |
| | 1 | | | | Relay contact output 1a (Alarm output 1) |
| 2 | | | | Relay contact output 1a (Alarm output 2) |
| | 0 | | | Not available |
| 4 | | | SSR output 0.3A 250V AC (Heating/Cooling control not supported when 2 alarm output points are selected) |
| | 0 | | Not available |
| 1 | | 5A (Heater burn-out alarm not supported when control output is current output type/not supported when heating and cooling control is selected) |
| 2 | | 10A (Heater burn-out alarm not supported when control output is current output type/not supported when heating and cooling control is selected) |
| 3 | | 20A (Heater burn-out alarm not supported when control output is current output type/not supported when heating and cooling control is selected) |
| 4 | | 50A (Heater burn-out alarm not supported when control output is current output type/not supported when heating and cooling control is selected) |
| | | Not available |
| 1 | Available |
| When heating/cooling is selected, alarm output 1 cannot be used. |
| When the communication function is selected, alarm output 2 cannot be used. |
| | | | | | | | | |
| Part No. |
| (Ex) Part No. when the optional functions (of Heating/Cooling control: relay contact output + Communications function) is added on to the basic model are as follows; |