Instruction manual

ControlWave GFC IS Communication Interface Manual (CI-CW-GFC-ISTRAN)
Issued Nov-09 Function and Electrical Characteristics 2-1
Chapter 2 – Function and Electrical Characteristics
You can use the ControlWave GFC Intrinsically Safe IStran
Communication Interface (IStran) in both hazardous and non-
hazardous environments.
2.1 Hazardous and Non-Hazardous Characteristics
Table 2-1 provides the characteristics common to both the hazardous
and non-hazardous IStran interfaces:
Table 2-1. Common Characteristics for Hazardous and Non-Hazardous Interfaces
Description Specification
Data Rate Maximum: 19.2 Kbps
Propagation Delay, any RX to
any TX
Maximum: 10 uS
Output Enable Delay
(Switched Mode, enable to
TX valid)
Typical: < 10 uS
Maximum: 50 uS
RX Input High Level Minimum: 4.5 VDC
Maximum: 16 VDC
RX Input Low Level Minimum: -16 VDC
Maximum: 0.5 VDC
RX Input Load Resistance Typical: 3.01 Kohm
TX Output Load Resistance Minimum: 3 Kohm
Quiescent Supply Current
(Both if in switched mode, all
TX off)
Maximum: 800 uA
Idle Supply Current (Both if in
unswitched mode, all TX low)
Typical: 21 mA
Active Supply Current (Both if
active, worst case)
Maximum: 43 mA
2.1.1 Hazardous Interface
You connect the hazardous interface to an intrinsically safe device.
Table 2-2, identifies each connector position, the corresponding signal
name, and briefly describes each input/output point on the hazardous
interface.
Table 2-2. Hazardous Interface Connector
Position Name Function
HJ2-4 HPOUT Hazardous Power Output - connect to HJ1-3
(HPIN) for single supply applications
HJ2-3 HPIN Hazardous Power Input
HJ2-2 HGND Hazardous Interface Ground - connect to HJ2-
1 (CGND) for single supply applications
HJ2-1 CGND Enclosure Ground (Tied to NGND)
HJ1-8 HGND Hazardous Interface Ground - (Reference for