AFBR-S10EB001Z Evaluation Kit for the AFBR-S10TR001Z Sensor Transceiver Application Note 5594 Introduction Evaluation kit This application note introduces the evaluation kit AF- The evaluation kit includes: BR-S10EB001Z, which has been designed to be used as 1x Evaluation board an evaluation platform for the Sensor Transceiver AFBR- 1x 9.0V DC power supply S10TR001Z. This evaluation kit provides system designers with a convenient means to evaluate the performance of 2x Jumpers the AFBR-S10TR001Z sensor transceiver. 1x 1-meter-long AFBR-TUS500Z transparent-jacket- The document describes in detail the board included in POF patch-chord with AFBR-4526Z duplex connector the evaluation kit and the test setups used for the evalua- at its ends (intended for testing of evaluation board in tion of the optical and electrical characteristics of the Sen- loop configuration). sor Transceiver AFBR-S10TR001Z. 1x 1-meter-long transparent-jacket-POF patch-chord with AFBR-4531Z simplex connectors at its ends Figure 1 shows the top view of the evaluation board of AFBR-S10TR001Z. 1x VL-to-VL AFBR-4536EZ duplex bulkhead 2x AFBR-4526Z duplex connectors The evaluation kit does not include: Flash light source * Digital multimeter Optical power meter Pulse/Pattern generator Oscilloscope High-impedance probe * Any Xenon-based photo camera flash light source is suitable. (Unomat B24 is recommended due to it being commonly availabile) Figure 1. Top side of the evaluation board of AFBR-S10TR001ZPCB Description The most important components of the evaluation board 3 x 2-pin header: are listed below: One of the 2-pin headers, identified as W1, allows monitoring the forward current of the transmitter of 1x AFBR-S10TR001Z module: AFBR-S10TR001Z (this current is monitored through This device, identified as U3, is the sensor transceiver R7, as shown in the schematic depicted in Figure 8) the and, therefore, it is the core of the evaluation board. purpose of the second 2-pin header, identified as W2, is to monitor the threshold fixed to differentiate between 1x Arduino microcontroller board: the heartbeat signal or noise generated either by am- This device, identified as M1, is the arithmetic-logic bient light or by the receiver of AFBR-S10TR001Z itself unit (ALU) of the evaluation board, where the electrical finally, the third 2-pin header, identified as W3, allows output of the receiver of AFBR-S10TR001Z is processed. sensing the output voltage generated by the receiver. After processing this electrical output, the Arduino mi- To monitor the forward current of the transmitter of crocontroller decides whether the received light has AFBR-S10TR001Z, by means of the 2-pin header W1, been generated by an arc flash event or, on the other and/or to monitor the threshold fixed to differentiate hard, it is due either to a heartbeat sent by the trans- between the heartbeat signal or noise, by means of the mitter of AFBR-S10TR001Z or to ambient light. 2-pin header W2, a digital multimeter properly con- nected to said 2-pin headers is needed. 1x switch button: This switch button, identified as SW1, allows the user 2x potentiometer: choosing the desired heartbeat mode. The possible op- One of the potentiometers, indentified as RV1, allows tions are Internal Heartbeat Mode and External Heart- changing the level of the threshold used by the Ardu- beat Mode. ino microcontroller to distinguish between heartbeat signal and noise the other potentiometer, identified 1x SMA connector: as RV2, allows modifying the forward current through This connector, identified as P6, allows the user provid - the LED of the transmitter of AFBR-S10TR001Z, which ing an external heartbeat signal to the sensor trans- is translated into a modification of the optical power ceiver. The aim of the heartbeat signal is to periodically of the heartbeat signal of the system (as mentioned check the availability of the arcflash detection system, before, the forward current of the transmitter of AFBR- including the sensor transceiver (AFBR-S10TR001Z) S10TR001Z may be monitored by means of the 2-pin and the sensor fiber (AFBR-TUS500Z). header identified as W1). To modify the values of the potentiometers RV1 and/or RV2, the use of the appro- 2 x 3-pin headers: priate screwdriver is required. One of the 3-pin headers, identified as JP1, allows en - abling/disabling a 50 termination, which is placed Figure 8 shows the schematic of the evaluation board sup- between the SMA connector previously mentioned plied in the AFBR-S10EB001Z evaluation kit. and ground. The aim of the 50 termination is to pro - vide impedance matching in case that the external heartbeat signal is supplied from an external pulse/ pattern generator with this output impedance the second 3-pin header, identified as JP2, is used to con - figure the operation mode of AFBR-S10EB001Z. There are two possible operation modes: Operate and Mea- sure. These two modes of operation are described in the next section of this application note. To enable/ disable the 50 termination by means of JP1 and/or to select Operate mode/Measure mode by means of JP2, the user has just to shortcircuit the appropriate pins of the 3-pin headers JP1 and/or JP2 by placing a jumper on them. The required jumpers are provided with the evaluation kit. 2