Table 2. outputs, S (table 2) – Despatch Protocol 3 Controller User Manual
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Protocol 3
Controller Owner’s Manual
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Version 1.2
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Item
Description
S
0 to 1762°C
32 to 3204°F
T
‐240 to 400°C
‐400 to 752°F *
Optional decimal place can be displayed up to 999.9°C/F
Thermocouple
Calibration:
±0.1% of full range, ±1LSD (±1°C for internal CJC if enabled).
Linearization better than better ±0.2°C (±0.05 typical) on
ranges marked * in the table above. Linearization for other
ranges is better than ±0.5°C. BS4937, NBS125 & IEC584.
Supported RTD Types
& Ranges:
Type
Range
°C
Range
°F
3
‐Wire
PT100
‐199 to 800°C
‐328 to 1472°F
NI120
‐80 to 240°C
‐112 to 464°F
Optional decimal place can be displayed up to 999.9°C/F
RTD Calibration:
0.1% of full range, ±1LSD
Linearization:
Linearization better than ±0.2°C (±0.05 typical).
PT100 input to BS1904 & DIN43760 (0.00385Ω/Ω/°C).
RTD Excitation:
Sensor current 150μA ±10%
Lead Resistance:
<0.5% of
span error for max 50Ωper lead, balanced
Supported Linear
Types & Ranges:
Type
Range
Offset Range
mA DC
0 to 20mA DC
4 to 20mA DC
mV DC
0 to 50mV DC
10 to 50mV DC
V DC
0 to 5V DC
1 to 5V DC
V DC
0 to 10V DC
2 to 10V DC
Scalable from
‐9999 to 10000. Decimal point selectable from 0
to 3 places, but limited to 5 display digits (e.g. 9999.9)
Maximum Overload:
1A on mA input terminals, 30V on voltage input terminals
DC Calibration:
±0.1% of full range, ±1LSD
DC Input Multi
‐Point:
Linearization:
Up to 15 scaling values can be defined anywhere between 0.1
and 100% of input
Table 2. Outputs.
Item
Description
Relays
Type & Rating:
Single pole single throw (SPST); 2A resistive at 120/240VAC
Lifetime:
>200,000 operations at rated voltage/current
Isolation:
Basic Isolation