ES-5971 Rev.11
A3DYH
Intrinsically Safe Galvanic Isolators A3-UNIT Series
CURRENT LOOP SUPPLY
(HART communication)
Functions & Features
• Powers a 4 – 20 mA DC current loop
• Isolated intrinsically safe associated apparatus: no need of grounding
• Isolates and relays HART signals bidirectionally
• Shortcircuit protection
• Power LED
Typical Applications
• 2-wire HART transmitters
MODEL: A3DYH–[1]A–R
ORDERING INFORMATION
• Code number: A3DYH-[1]A-R
Specify a code from below for [1].
(e.g. A3DYH-0A-R)
For the safety approval code 2, specify the product’s destination country using Ordering Information Sheet (No. ESU-5971).
[1] SAFETY APPROVAL
0
: None
1
: FM intrinsically safe
2
: ATEX intrinsic safety
INPUT
Current
4 – 20 mA DC
OUTPUT
Current
A
: 4 – 20 mA DC
POWER INPUT
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
GENERAL SPECIFICATIONS
Construction
: Stand-alone; terminal access at the front
Connection
: Euro type connector terminal
(applicable wire size: 0.2 to 2.5 mm
2
, stripped length 8 mm)
Housing material
: Flame-resistant resin (gray)
Isolation
: Input to output to power
Overrange output
: Approx. -10 to +110 %
Zero adjustment
: -2 to +2 % (front)
Span adjustment
: 98 to 102 % (front)
Power indicator LED
: Green LED turns on while the power is supplied.
SUPPLY OUTPUT
■
SUPPLY OUTPUT
(across the terminals 1 – 2, 4 – 5)
Output voltage
: Approx. 22 V DC with no load 14 V DC minimum at 20 mA.
A loop-powered device (e.g. indicator) through which the A3DYH supplies excitation voltage to a two-wire transmitter causes a certain voltage drop. Be sure that the voltage after the drop remains within the transmitter’s operating range.
Current rating
: ≤ 22 mA DC
•
Shortcircuit Protection
Current limited
: 30 mA max.
Protected time duration
: No limit
INPUT SPECIFICATIONS
■
INPUT
: Input resistor incorporated.
Approx. 330Ω as two-wire transmitter excitation supply; approx. 45 Ω as isolator with 4 – 20 mA input
OUTPUT SPECIFICATIONS
■
LOAD RESISTANCE
: 550 Ω max. (230 min. required for HART communication)
HART COMMUNICATION
Frequency band
: 500 Hz – 5 kHz (within -3 dB)
Communication directions
: Bidirectional
INSTALLATION
Power consumption
•
DC
: Approx. 3 W
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 0 to 95 %RH (non-condensing)
Mounting
: DIN rail
Weight
: 130 g (0.29 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.1 %
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F)
Response time
: ≤ 0.1 sec. (0 – 90 %)
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 1500 V AC @ 1 minute
(input to output or power to ground)
500 V AC @ 1 minute (output to power)
STANDARDS & APPROVALS
Refer to the manuals to comply with the standards.
EU conformity
:
ATEX Directive (for ATEX intrinsic safety)
Ex ia EN 60079-11
EMC Directive
EMI EN 61000-6-4
EMS EN 61000-6-2
RoHS Directive
Safety approval
:
FM: Intrinsically safe associated apparatus
Class I, Div. 1, Groups A, B, C and D
Class II, Div. 1, Groups E, F and G
Class III, Div. 1
Class I, Zone 0, [AEx ia] IIC
(Class 3600)
(Class 3610)
(ANSI/ISA 60079-0)
(ANSI/ISA 60079-11)
HART COMMUNICATION
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM