Yokogawa Head Mount YTA70 Temperature Transmitter

The YTA70 is a head mount type of temperature transmitter that accepts thermocouple, RTD, ohms or DC milivolts input and converts it to a 4 to 20 mA DC signal for transmission. The YTA70 conforms to the standard DIN form B head mounting. The YTA70 supports HART® communication protocol.

HART protocol revision is selectable from HART 5 orHART 7, and HART 7 features long tag number up to 32 characters, enhanced burst mode and event notification, and command aggregation function.

The YTA70 delivers all the benefits found in the YTA50 while adding HART® digital protocol communication. The HART® protocol allows you to conveniently configue the transmitter using the latest FDT/DTM technology. The YTA70 is the choice for all your control applications.

YTA70 features include:

• 4 to 20 mA DC Analog Output
• HART® 5 Digital Protocol Output (-E version)
• Selectable HART® 5 / 7 Digital Protocol Output (-J version)
• 17 Input Types
• Head Mount or DIN Rail Mount

STANDARD SPECIFICATIONS

Accuracy
See Table 1. on page 3.
Cold Junction Compensation Accuracy
(For T/C only)
±1°C (±1.8°F)
Ambient Temperature Effects
See Table 1. on page 3.
Power Supply Effects
±0.005% of FS per Volt
EMC Conformity
EN61326-1 Class A, Table 2
EN61326-2-3
EU RoHS Directive
Applicable standard: EN 50581
Input Type, Span and Range
Selection from thermocouples (T/Cs), 2-, 3-, and 4-
wire RTDs, ohms and DC milivolts.
See Table 1 on page 3.
Maximum Zero offset
±50% of selected maximum value
Input Resistance (for thermocouples, mV)
10 MΩ, or 3 kΩ at power-off
Input Lead Wire Resistance (for RTD, ohm)
5 Ω per wire or lower
(up to 50 Ω per wire is configurable with reduced
measurement accuracy)
Sensor Burnout
High (NAMUR NE43 upscale), Low (NAMUR NE43
downscale), or value within 3.5 to 23 mA
Output
Two wire 4 to 20 mA DC
Response Time
1 to 60 seconds programmable
Ambient Temperature Limits
(Option code may affects limit)
-40 to 85°C (-40 to 185°F)
Ambient humidity limits
0% to 95% RH (non-condensation)
Isolation
Input/output isolated to 1500 V AC.

Supply & Load Requirements:
Voltage

8 to 35 V DC for operation
(8 to 30 V DC for Intrinsically safe type)
13.8 to 35 V DC for digital communication
Load Resistance
0 to (E-8)/0.0236 [Ω]
where E is power supply voltage.
250 to 600 Ω for digital communication