Product details
Intrinsic safety & signal conditioning
Redundant power feed module
2 recommended per rail
The power feed module interfaces 24V d.c. power to the Power Rail at a maximum current of 4A and is designed for applications requiring redundant power. The twin input terminals allow for daisy-chaining of supply (max. 10A).
A green LED on the front of the unit indicates that power is on and a red LED illuminates during error conditions. In the event of a field wiring or barrier fault from any barrier on the Power Rail, the integral collective error messaging relay alerts the controller via a single digital I/O point. This relay can be configured as normally open or normally closed.
Additionally, the bus implemented in the Power Rail is forwarded to the outside terminals 13 and 15 for usage with KFD2-WAC2-Ex1.D RS 485 connection. Terminal 14 is only for test purposes.
In the sense of functional safety (SIL) the device provides no dangerous failures. Thereby the safe condition of the supplied barrier must be defined as the powerless state. Thus the device will not influence the safety calculation or the SIL value.
This device is compatible with all versions of the Power Rail and provides group fusing.
Note: Redundant systems require two KFD2-EB.R4A.B modules.
Technical specification
|
| Connection: | Terminals 11+, 12-
|
| Terminals 8+, 9-
|
| Rated voltage Un: | 20-30V d.c.*
|
| Power loss: | ≤2.4W
|
| Power Rail feed output current: | ≤4A
|
| Fault signal relay output: | NO contact
|
| Ambient temperature: | -25 to +60°C
|
| Protection rating: | IP20
|
| Dimensions: | h20 x w119 x d115mm
|
| Mounting: | 35mm DIN mounting rail acc. to
|
| EN 60715:2001 |
*The maximum rated operating voltage of the devices plugged onto the Power Rail must not be exceeded.
Features:
Interface for Power Rail
Used for redundant configuration
Supply rating 4A, external fused
Relay contact output, reversible
LED status indication
