ES-5448 Rev.2
M8DYH
Dual Output Super-mini Signal Conditioners Pico-M Series
CURRENT LOOP SUPPLY
(applicable to HART signal)
Functions & Features
• Powers a 4 – 20 mA DC current loop
• Isolates and relays HART signals
• Shortcircuit protection
• Opencircuit detection selectable
• Space-saving, easyto-maintain, multi-channel installation base
Typical Applications
• 2-wire HART transmitters
MODEL: M8DYH-AY-R[1]
ORDERING INFORMATION
• Code number: M8DYH-AY-R[1]
Specify a code from below for [1].
(e.g. M8DYH-AY-R/RE/Q)
• Specify the specification for option code /Q
(e.g. /C01 /V01)
INPUT
Current
4 – 20 mA DC (Input resistance 250 Ω)
OUTPUT 1 / OUTPUT 2
AY
: 4 - 20 mA DC / None
POWER INPUT
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
[1] OPTIONS (multiple selections)
Output polarity reversal
blank
: none
/RE
: Output polarity reversal
Other Options
blank
: none
/Q
: With options (specify the specification)
SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to our web site.)
/C01
: Silicone coating
/C02
: Polyurethane coating
/C03
: Rubber coating
ADJUSTMENT
/V01
: Multi-turn fine adjustment
RELATED PRODUCTS
• Installation Base or Single Mount Base Socket (model: M8BSx)
This unit must be mounted on dedicated base or socket except Model M8BS2 base and M8BS-1.
GENERAL SPECIFICATIONS
Construction
: Plug-in
Mounting screw
: M3 screw (torque 0.3 N·m)
Housing material
: Flame-resistant resin (black)
Power supply
: Via the Installation Base terminals
(model: M8BSx)
(Model M8BS2 and M8BS-1 are not usable for the M8DYH.)
Isolation
: Input to output 1 to output 2 to power
Zero adjustment
: -2 to +2 % (front)
Span adjustment
: 98 to 102 % (front)
SUPPLY OUTPUT
(across the terminals 1 – 2)
Output voltage
: 24 – 28 V DC with no load
18 V DC min. at 20 mA
Current rating
: ≤ 22 mA DC
•
Shortcircuit Protection
Current limited
: 45 mA max.
Protected time duration
: No limit
INPUT SPECIFICATIONS
■
DC Current
: Input resistor incorporated
Input current
: ≥ 0 mA
OUTPUT SPECIFICATIONS
The output goes below 0 % when the input is open.
Load resistanc: 200 - 300 Ω
(250 Ω ±10% when using HART communication)
Polarity of output is reversed with option code /RE (with output polarity reversal).
HART COMMUNICATION
Transmission gain
: Approx. -3 dB (within 1 – 3 kHz)
measured with 250 Ω at output
Loop impedance
: 250 Ω ±10 %
Communication directions
: Bidirectional
INSTALLATION
Current consumption
: Approx. 54 mA
Operating temperature
: 0 to 55°C (32 to 131°F)
Operating humidity
: 30 to 95 %RH (non-condensing)
Mounting
: Installation Base (model: M8BSx)
Weight
: 50 g (1.76 oz)
PERFORMANCE in percentage of span
Accuracy
: ±0.1 %
Temp. coefficient
: ±0.02 %/°C (±0.01 %/°F)
Response time
: ≤ 0.5 sec. (0 – 90 %)
Line voltage effect
Supply output
: ±3 % over voltage range
Output signal
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
:
1500 V AC @1 minute (input to output 1 or output 2 or power to ground)
500 V AC @1 minute (output 1 to output 2 to power)
EXTERNAL DIMENSIONS unit: mm [inch]
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM