Watlow F4T

Watlow F4T • 323 • Chapter 6 Appendix
4 Thermistor Inputs
Input Type
Max Error @
25 Deg C
Accuracy
Range Low
Accuracy
Range High
Units
Thermistor, 5K range ±5 0 5000 Ohms
Thermistor, 10K range ±10 0 10000 Ohms
Thermistor, 20K range ±20 0 20000 Ohms
Thermistor, 40K range ±40 0 40000 Ohms
• 0 to 40KΩ, 0 to 20KΩ, 0 to 10KΩ, 0 to 5KΩ
• 2.252KΩ and 10KΩ base at 77°F (25°C)
• Linearization curves built in
• Third party Thermistor compatibility requirements
Base R @ 25C Alpha Techniques Beta THERM YSI
2.252K Curve A 2.2K3A 004
10K Curve A 10K3A 016
10K Curve C 10K4A 006
3 Universal Process/Retransmit Outputs
• Universal process/retransmit, Output range selectable:
- 0 to 10V Î(dc) into a min. 4,000Ω load
- 0 to 20mA into max. 800Ω load
Resolution
- dc ranges: 2.5mV nominal resolution
- mA ranges: 5 µA nominal resolution
Calibration Accuracy
- dc ranges: ±15 mV
- mA ranges: ±30 µA
Temperature Stability
- 100 ppm/°C
3 Mechanical Relay Outputs
• 2 Form C relays, 1 Form A relay. Form A shares common with 1 Form C relay
• Each relay is rated at 5A, 24 to 240VÅ (ac) or 30VÎ (dc)max., resistive load, 100,000
cycles at rated load. Requires a min. load of 20mA at 24V, 125 VA pilot duty
4 Mechanical Relay Outputs
• Form A, 5A each, 24 to 240VÅ (ac) or 30VÎ (dc)max., resistive load, 100,000 cycles
at rated load. Requires a min. load of 20mA at 24V, 125 VA pilot duty
2 Solid-State Relays
• Form A, 10A max. each SSRs combined at 24VÅ (ac) min., 264VÅ (ac) max., opto-
isolated, without contact suppression, max. resistive load 10A per output at 240V
Å
(ac), max. 20A per card at 122°F (50°C), max.
• 12A per card at 149°F (65°C)