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(4) Control Drawing of USB (Type A) Interface (USB1)
The information below concerns the use of the USB interface used in Class I, Division 2, Groups A, B, C,
and D hazardous locations (from Doc No. 3910017-USB).
Notes:
1. Nonincendive Circuit Parameters:
USB interface:
Voc = 5.25 V
Isc = 0.7 A
Ca = 16 µF
La = 10 µH
2. Selected Associated Nonincendive Field Wiring Apparatus shall satisfy the following:
3. If the electrical parameters of the cable are unknown, the following values may be used:
Capacitance = 60 pF/ft
Inductive = 0.20 µH/ft
4. Nonincendive Field Wiring must be installed in accordance with article 501.10(B) of the National
Electrical Code ANSI/NFPA 70.
5. Nonincendive Field Wiring Apparatus shall not contain or be connected to another source of power.
(5) USB (mini-B) Interface (USB2) is for temporary connection only during maintenance and setup of the
device. Do not use, connect, or disconnect unless area is known to be non-hazardous. Connection or
disconnection in an explosive atmosphere could result in an explosion.
Associated Nonincendive Field
Wiring Apparatus for USB (Type A)
interface of the GP-4100 Series
-
Nonincendive Field Wiring
Apparatus
Voc ≤ Vmax
Isc ≤ lmax
Ca
≥ Ci + C cable
La
≥ Li + L cable
USB Pin Description
1. Vcc
2. D-
3. D+
4. GND
(See Note 1 for details)
Shield GND
Nonincendive Field
Wiring Apparatus
1 2 3 4
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