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Technical Specifications
Model
Power supply
Power consumption
Measuring range temp.
Measuring range CO2
Measuring range humidity
Analogue output
Accuracy temperature
Accuracy CO2
Accuracy humidity
Calibration
Sensor
Display
Enclosure
Protection
Cable entry
Connection electrical
Ambient condition
Storage condition
EU conformity
Johnson Controls, Inc., declares that these products are in compliance with the essential
requirements and other relevant provisions of the EMC Directive and Rohs Directive.
Installation
The installation of electrical wiring must conform to local codes and should be carried out by authorized personnel
only. Users should ensure that all Johnson Controls products are used safely and without risk to health or
property.
The SCD CO2 sensors are intended to provide input to equipment under normal operating conditions. Where
failure or malfunction of a SCD sensors could lead to an abnormal operating condition that could cause personal
injury or damage to the equipment or other property, other devices (limit or safety controls) or systems (alarm or
supervisory) intended to warn of, or protect against, failure or malfunction of the SCD sensors must be
incorporated into and maintained as part of the control system.
Wiring
Before connecting or disconnecting any wires, ensure that all power supplies have been switched off and all wires
are potential-free to prevent equipment damage and avoid electrical shock. Terminations are made on the
dismountable terminal blocks in the base of the module, which accept up to 1,5 mm" wires. Follow the wiring
diagrams shown in the figure below. All wiring to the module is at safety extra low voltage (SELV) and must be
separated from power line voltage wiring. Do not run wiring close to transformers or high frequency generating
equipment. Complete and verify all wiring connections before applying power to the controller to which the module
is connected.
SCD-200-E00-00
active, 2x 0..10V, CO2 + temperature
SCD-201-E00-00
active, 2x 0..10V, CO2 + temperature + LCD
SCD-310-E00-00
active, 3x 0..10V, CO2 + temperature + relative humidity
SCD-311-E00-00
active, 3x 0..10V, CO2 + temperature + relative humidity + LCD
SCD-220-E00-00
active, 2x 4..20mA, CO2 + temperature
SCD-221-E00-00
active, 2x 4..20mA, CO2 + temperature + LCD
active 0..10V
15..35 V = or 19..29 V ~ SELV
active 4..20mA
15..35 V = SELV
max. 0,4 W (24 V =) | 0,8 VA (24 V ~)
0..+50 °C
0..2000 ppm
0..100 % rH
2x/3x 0..10 V, min. load 10 kΩ
±0,5K (typ. at 21 °C)
±50 ppm +3% of measured value (typ. @ 21 °C, 50% rH)
±2% between 10..90% rH (typ. at 21 °C)
self-calibration, Dual Channel
NDIR (non-dispersive, infrared)
SCD-xx1
LCD 29x35 mm with RGB backlight
PC V0, pure white
IP20 according to EN 60529
rear entry, breaking points, drill mark top
tool-free mountable spring terminal, max. 1,5 mm²
0..+50 °C, max. 85% rH, non-condensing
-30..+70 °C, max. 85% rH, non-condensing
SCD-xxx Differential Pressure Transmitter
2
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