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Table 14: Main Specifications Table for MS8250.
Item
Dimensions
Power Requirements
Output Ratings
Operating Conditions
Storage Conditions
Temperature Sensor
Temperature Sensor Resolution
Temperature Control Accuracy
Humidity Sensor Precision
Humidity Sensor Stability
Occ, Unocc and Standby Cooling Setpoint Range
Occ, Unocc and Standby Heating Setpoint Range
Room and Outdoor Air Temperature Display Range
Proportional Band for Room Temperature Control
Analog Inputs
Binary Inputs
Remote Temperature Sensor Requirements
Wiring Gauges
Shipping Weight
Room Controller Input Power
Usage of the CO
sensor module within the Room Controller draws additional power. It is recommended when using the CO
2
transformer be capable to accommodate the additional power consumption. Room Controller power consumption of 12 Vac and input voltage range
of 24-28 Vac is required.
Input: 24 Vac ±15% recommended, Absolute Max. 29.5 Vac, 50 / 60Hz or 24 Vdc ±15%
Peak device consumption: up to 6 Vac with CO
Four Analog Outputs: 0 - 10 Vdc, 5mA maximum, (2 kilo-ohm resistance)
Due to our policy of continuous product innovation, some specifications may change without notification.
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MAIN SPECIFICATIONS
Description
4.72 in. (H) x 3.39 in. (W) x 1.06 in. (D) (12cm x 8.6cm x 2.5cm)
Load (max total 94 Vac)
Transformer maximum rating: 100 Va, 4.17 A
Nine Electronic Relays: 24 Vac or 24 Vdc ±15% same as input power,
1.0 Amp., in-rush = 3.0 Amps;
Configurable Output Analog/Electronic Relay
32°F to 122°F (0°C to 50°C)
0% to 95% R.H. non-condensing
-22 °F to +122°F (-30°C to +50°C)
0% to 95% R.H. non-condensing
Local 10 K NTC type 2 thermistor
± 0.2°F (± 0.1°C)
± 0.9°F @ 70 °F (±0.5°C @ 21°C) typical calibrated
Reading range from 10-90% R.H. non-condensing
10% to 20% precision: 10%
20% to 70% precision: 5%
70% to 90% precision: 10%
Less than 0.25% yearly (typical drift)
54°F to 100°F (12.0°C to 37.5°C)
40°F to 90°F (4.5°C to 32°C)
-40°F to +122°F (-40°C to +50°C)
Cooling and Heating: Default: 3.2°F (1.8°C)
Modulating 0-10 Vdc across UI19, UI24 to to Common
Dry contact across terminals UI16, UI17 to Common
10 K NTC Type 2 thermistor UI20, UI22, UI23
Power supply: 18 gauge or larger,
Communications: 24 gauge or larger
0.75 lb. (0.34 kg)
sensor or Wi-Fi module Plus Output
2
sensor module, the site
2
29
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