Operating Instruction

EDGE FCR 3 Operating Instruction

Page 38 of 64 Release Rev. C, 2019-09-10

4.2.1 SIM-Card

A Micro SIM card is needed for the operation of the LTE modem. Push the Micro SIM card into

the slot until you hear the click. To remove the Micro SIM card push it and it will pop out.

4.2.2 USB and Display Port

The Display port and the USB port are used for debug purposes.

4.2.3 HART and Current Loop Interface

The EDGE FCR 3 does have four analogue input channels, marked as CH0- to CH3+ (Figure

28). This interface can work either as current input channel (4…20mA) or HART

analogue

input channel. The way how the interface is working is pre-defined in the software in context

with the device order (specification).

CAUTION

The channels do have a common grounding and no galvanic barrier to the

24VDC supply voltage of the EDGE FCR 3.

Figure 28: HART and current loop interface

IMPORTANT NOTICE

Please follow the instructions in chapter 3.6.3 Push-In Spring Power

Connector (p.32) to connect / disconnect cables from this interface

(similar handling).

The HART Communication Protocol (Highway Addressable Remote Transducer) is an open hybrid analogue & digital industrial

automation protocol. Its most notable advantage is that it can communicate over legacy 4–20mA analogue instrumentation

current loops, sharing the pair of wires used by the analogue-only host systems. HART is widely used in process and

instrumentation systems ranging from small automation applications up to the highly sophisticated industrial applications.