The CRep S8C/FD 8-channel CAN bus repeater supports both Classic CAN and CAN FD networks, transparently regenerating and retransmitting CAN signals independent of the protocol in use. It enables flexible network topologies, including star and tree configurations as well as stub-line connections. Up to three CRep S8C/FD repeaters can be combined to support up to 24 channels while maintaining low propagation delay. Cascade connections are established by mounting units side-by-side and plugging them directly into each other via the adjacent D-Sub 9 connectors; no additional cabling is required. A non-cascadable “CRep S8/FD” build is optionally available for applications requiring only 8 channels.
Key Features
- Protocol-transparent 8-channel CAN repeater for CAN FD and Classic CAN
- Cascadable to support up to 24 CAN channels via direct module-to-module connection without external cascade cables
- Optional non-cascadable CRep S8/FD build for applications requiring only 8 CAN channels
- Low propagation delay with shutdown of erroneous bus segments
- Signal conditioning over long distances with optional 120Ω or high-impedance termination
- ISO 11898-2:2016 and CiA 601-4 (SIC) compatible bus interface (TI TCAN1462)
- Factory-configurable baud rate: 10/20/50/125/250/500 kBaud (set via inhibit time at the time of order)
- DIN-rail mountable
- FCC Class A verified (use restricted to commercial, business, and industrial environments)
- Backed by 25+ years of CAN expertise
Specifications
Layout and Connection
A CRep S8C/FD device includes eight CAN segments, wired by terminal blocks with 3 clamps. The power supply of CRep S8C is separately wired by a terminal block with 2 clamps.
| Pin | Name | Description |
| 1 | CAN_H | CAN high bus line |
| 2 | CAN_L | CAN low bus line |
| 3 | GND | CAN Ground |
The following table shows the terminal assignment of the power connector:
| Pin | Name | Function |
| 1 | Power + | Positive supply +24V |
| 2 | Power – | Ground |
Nominal Values
All values, unless otherwise specified, refer to a supply voltage of 24V and an environmental temperature of 20°C.
| Parameter | Minimal | Typical | Maximal | Unit |
| Current consumption (running idle) | – | 30 | – | mA |
| Current consumption (250kBaud, 100% busload) | – | 80 | – | mA |
| Power Supply voltage | 19 | 24 | 30 | V |
| Propagation delay between two arbitrary channels (Cascadable Version) | – | 160 | 210 | ns |
| Propagation delay between two arbitrary channels (Non-Cascadable Version) | – | 130 | 200 | ns |
| Propagation delay cascade (Cascadable Version) | – | 12 | 15 | ns |
| Internal termination resistor | 119.6 | 120.8 | 122.0 | Ohm |
| Maximum power dissipation of termination resistor | – | – | 1 | W |
| Internal high impedance termination resistor | 3.56 | 3.60 | 3.64 | kOhm |
Limiting Values
Any (also temporary) stress in excess of the limiting values may cause permanent damage on CRep S8C/FD and other connected devices. Exposure to limiting conditions for extended periods may affect the reliability and shorten the life cycle of the device.
| Parameter | Minimal | Maximum | Unit |
| Storage temperature | -40 | +85 | °C |
| Operating temperature | -20 | +70 | °C |
| Supply voltage | -100 | +35 | V |
| Voltage range on CAN_H and CAN_L with respect to CAN GND* | -36 | +36 | V |
| Maximum differential voltage between CAN_H and CAN_L (Product Version: high impedance termination)** | -45 | +45 | V |
| Maximum permanent voltage between CAN_H and CAN_L (Product Version: 120 Ohm termination)** | -11 | +11 | V |
* According to CAN transceiver and ESD protection diode specification.
** Voltages are limited by max power dissipation of internal termination resistors.
