The ET-7255/PET-7255 provides 8 Dry/wet contact digital input channels and 8 source-type digital output channels. It features optical isolation for 2500 VDC of transient overvoltage protection but doesn’t provide channel-to-channel isolation. Each input channel can be used as a 32-bit counter and each output channel can drive 650 mA load. The power-on value and safe value of digital output channel are programmable. It can safely be used in applications where hazardous voltages are present.
| Software | |
| Built-In Web Server | Yes |
| Web HMI | Yes |
| I/O Pair Connection | Yes |
| Communication | |
| Ethernet Port | 2 x RJ-45, 10/100 Base-TX, Swtich Ports |
| PoE | Yes |
| Protocol | Modbus/TCP, Modbus/UDP |
| Security | ID, Password and IP Filter |
| Dual Watchdog | Yes, Module (0.8 second), Communication (Programmable) |
| LED Indicators | |
| for System Running | Yes |
| for Ethernet Link/Act | Yes |
| for DI/DO status | Yes |
| for PoE Power | Yes |
| 2-Way Isolation | |
| Ethernet | - |
| I/O | 2500 VDC |
| EMS Protection | |
| ESD (IEC 61000-4-2) | ±4 kV Contact for Each Terminal and ±8 kV Air for Random Point |
| EFT (IEC 61000-4-4) | ±2 kV for Power Line |
| Surge (IEC 61000-4-5) | ±2 kV for Power Line |
| Power Requirements | |
| Reverse Polarity Protection | Yes |
| Powered from Terminal Block | 12 ~ 48 VDC |
| Powered from PoE | Yes, IEEE 802.3af, Class1 |
| Consumption | 4.0 W |
| Mechanical | |
| Dimensions (W x L x H) | 76 mm x 120 mm x 38 mm |
| Installation | DIN-Rail or Wall mounting |
| Environmental | |
| Operating Temperature | -30°C ~ +75°C (-22°F ~ +167°F) |
| Storage Temperature | -30°C ~ +80°C (-22°F ~ +176°F) |
| Humidity | 10 ~ 90% RH, Non-condensing |
| Digital Input/Counter | ||
| Channels | 8 | |
| Contact | Dry +Wet | |
| Sink/Source (NPN/PNP) | Dry: Source Wet: Sink/Source | |
| Wet Contact | On Voltage Level | +10 VDC ~ +50 VDC |
| Off Voltage Level | +4 VDC Max. | |
| Dry Contact | On Voltage Level | Close to GND |
| Off Voltage Level | Open | |
| Input Impedance | 10 k | |
| Counters | Max. Count | 4,294,967,295 (32 bits) |
| Max. Input Frequency | 100 Hz | |
| Min. Pulse Width | 5 ms | |
| Overvoltage Protection | +70 VDC | |
| Effective Distance | 500 M Max. | |
| Digital Output | ||
| Channels | 8 | |
| Type | Isolated Open Collector | |
| Sink/Source (NPN/PNP) | Source | |
| Max. Load Current | 650 mA/channel at 25°C | |
| Load Voltage | +10 VDC ~ +40 VDC | |
| Overvoltage Protection | 47 VDC | |
| Overload Protection | - | |
| Short-circuit Protection | Yes | |
| Power-on Value | Yes, Programmable | |
| Safe Value | Yes, Programmable | |
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