Chapter 2 - Function And Electrical Characteristics; Hazardous And Non-Hazardous Characteristics; Hazardous Interface; Hazardous Interface - Emerson ControlWave GFC IStran Instruction Manual

Chapter 2 – Function and Electrical Characteristics

2.1 Hazardous and Non-Hazardous Characteristics

Table 2-1. Common Characteristics for Hazardous and Non-Hazardous Interfaces

2.1.1 Hazardous Interface

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