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| Models | I-8431-MTCP | I-8431-80-MTCP | I-8831-MTCP | I-8831-80-MTCP |
| CPU module | ||||
| CPU | 80188 or compatible (8-bit and 40MHz)/I-8431-MTCP/I-8831-MTCP 80186 or compatible (16-bit and 80MHz)/I-8431-80-MTCP/I-8831-80-MTCP |
|||
| SRAM | 512 KBytes | |||
| Flash | 512 KBytes | |||
| EEPROM | 2 KBytes | |||
| NVRAM | 31 Bytes | |||
| RTC (real time clock) | Yes | |||
| Hardware Serial Number | Yes | |||
| Built-in Watchdog Timer | Yes | |||
| Communicate Interface | ||||
| COM 0 | Internal communication with the 87K modules | |||
| COM 1 | RS-232 (to update firmware) | |||
| COM 2 | – | |||
| COM 3 | RS-232/RS-485 | |||
| COM 4 | RS-232 | |||
| Ethernet Port | 10BaseT NE2000 compatible | |||
| SMMI | ||||
| 5 - Digit LED Display | Yes | |||
| 3 - Programmable LED Indicators | Yes | |||
| 4 - Push Buttons | Yes | |||
| I/O expansion slots | ||||
| Slot Number | 4 Slots | 8 Slots | ||
| Mechanical | ||||
| Dimensions | 230 mm x 110 mm x 75.5 mm | 354 mm x 110 mm x 75.5 mm | ||
| Environmental | ||||
| Operating Temperature | -25 °C ~ +75 °C | |||
| Storage Temperature | -30 °C ~ +85 °C | |||
| Humidity | 10 ~ 90%,non-condensing | |||
| Power | ||||
| Protection | Power reverse polarity protection | |||
| 3 KV power isolation | Yes | |||
| Power requirement | 10 ~ 30 VDC | |||
| Power supply | 20 W | |||
| Power consumption | 3.9 W | 5.1 W | ||