Instruction manual

ControlWave GFC IS Communication Interface Manual (CI-CW-GFC-ISTRAN)
Figure 1-4. IStran PCB Mounted on Base Plate (Cover removed)
1.1.1 IStran PCB
The IStran PCB provides two interfaces designated hazardous and non-
hazardous. You configure each interface independently to operate in
either switched or unswitched mode.
Switched Mode
Switched mode sets the TX drivers into a high-impedance state to
reduce power consumption.
Unswitched Mode
In unswitched mode, the TX drivers are always active and they always
follow the corresponding RX inputs. In cases where power consumption
is not a key factor, configure the IStran for unswitched mode.
Issued Nov-09 Introduction 1-3