The RX40C7 is a 16‑point 24 V DC input module for the Mitsubishi MELSEC iQ‑R PLC series, designed for reliable signal acquisition in industrial automation. It supports both positive and negative common wiring, uses a robust 18‑point screw terminal block, and offers selectable response times from 0.1 ms to 70 ms for flexible matching with sensors and switches.
Figure 1 shows the front panel of RX40C7.


Table 1 shows the Quick Specs
| Item | Specification |
|---|---|
| Model | RX40C7 |
| Series | MELSEC iQ‑R |
| Type | DC input module |
| Input points | 16 points |
| Rated voltage | 24 V DC |
| Terminal | 18‑point screw terminal |
| Parameter | Value |
|---|---|
| Model | RX40C7 |
| Series | MELSEC iQ‑R |
| Input type | 24 V DC input (positive/negative common shared) |
| Number of input points | 16 points |
| Rated input voltage | 24 V DC (ripple ≤5%) |
| Allowable voltage | 20.4–28.8 V DC |
| Rated input current | 7.0 mA typical |
| ON voltage / current | ≥15 V / ≥4 mA |
| OFF voltage / current | ≤8 V / ≤2 mA |
| Response time | 0.1–70 ms (selectable) |
| Internal current consumption (5 V DC) | Approx. 120 mA |
| Wiring | 18‑point M3 screw terminal block |
| Dimensions (W×H×D) | 27.8 mm × 98 mm × 131 mm |
| Certifications | CE, UL/cUL, UKCA, RoHS, marine approvals |

