SDC-HT Duct Humidity & Transmitter Features Replaceable sensor element Humidity and temperature measurement for air ducts Minimum and maximum value memory 0 0V, 0 0mA or 0V, 4 0mA measuring signals selectable with jumpers Optional alternative signal ranges programmable Selectable averaging signal Optional LCD display (OPC-S) or external display (OPA-S) Status LED Applications Humidity & temperature measurement for supply and return air ducts in heating, ventilation and air conditioning applications. Recording of minimum and maximum values for critical environments Supervision of critical humidity and temperatures Humidity & Transmitter SDC-HT A unique capacitive sensor element is used for measuring relative humidity while temperature is measured by a bandgap sensor. The applied measuring technology guarantees excellent reliability and long term stability. The microprocessor samples the humidity and temperature once per second. It calculates an averaging signal over a preset number of seconds and generates the output signal based on lower and upper signal range values. Standard range is 0 00% rh, -40 60 C (-40 40 F) and 0 seconds average. The signal range of the temperature measurement and the averaging samples may be customized. The output signal range and type may be customized by jumpers and if required by a programming tool. Standard signal ranges are 0-0VDC, -0VDC, 4-0mA and 0-0mA. These ranges can be set by jumpers. Other ranges can be set by using a programming tool. (OPA-S or OPC-S) A version with display is possible by ordering the integrated display accessory OPC-S Minimum and Maximum Values: Using the programming tool, the user has the option to read out and reset minimum and maximum values. The minimum and maximum values may as well be used as output signals. The minimum and maximum values are saved into the EEPROM and are available after a power interruption. Ordering In order to receive an operational unit, the signal converter, the sensor element and the conduit connector or cable gland need to be ordered. Optionally a display module may be added. Signal converter Item Name Item Code Description/Option SDC-HT-08 40-0 0064 Signal converter for duct mounting: probe length 8 cm ( ) SDC-HT-6 40-0 0065 Signal converter for duct mounting: probe length 6 cm (6. ) SDC-HT-4 40-0 0095 Signal converter for duct mounting: probe length 4 cm (9.4 ) SDC-HT-x-W0 40-0 00xx-0 0 Range: -40 60 C (-40 40 F) (Default) SDC-HT-x-W 40-0 00xx- Range: -5...5 C (- 95 F) SDC-HT-x-W 40-0 00xx- Range: 0 50 C ( F) SDC-HT-x-W 40-0 00xx- Range: Special Specify in order Sensor element Item Name Item Code Humidity Accuracy [%rh] Accuracy [K] @5 C (77 F) AES-HT-A 40-50 00- ± % ± 0. AES-HT-A 40-50 00- ± % ± 0.4 AES-HT-A5 40-50 00-5 ± 4.5% ± 0.5 Description/Option Humidity - temperature sensor element Accessories Item Name Item Code Description/Option OPC-S 40-50 009 Built in display & programming module OPA-S 40-50 0006 External display module AMS- 0-0 06 Weather shield to protect the sensor element AMC- 0-0 005 Cable gland PG9 for cables 4 8 mm (AWG 6 ) AMC- 0-0 0067 Conduit connector NPT / Doc: 70-00-065, V.0, 050904 Vector Controls GmbH, Switzerland Page
SDC-HT Technical Specification Power Supply Sensing Probe Signal Outputs Environment Standards Operating Voltage Transformer Power Consumption Terminal Connectors Humidity Sensor: Range Measuring Accuracy Hysteresis Repeatability Stability Sensor: Range Measuring Accuracy Repeatability Analog Outputs Output Signal Resolution Maximum Load Operation Climatic Conditions Humidity Transport & Storage Climatic Conditions Humidity Mechanical Conditions conformity EMC Directive Low Voltage Directive Product standards Automatic electrical controls for household and similar use Special requirement on temperature dependent controls Electromagnetic compatibility for domestic and industrial sector Degree of Protection to EN 6059 Mounted probe down with AMS- 4 V AC 50/60 Hz 0%, 4VDC 0% SELV to HD 84, Class II, 48VA max Max VA For wire 0.4.5 mm (AWG 4 ) Capacity sensor element 0 00 % rh See Figure % 0.% < 0.5% / year Bandgap sensor -40 70 C (-40 58 F) See Figure 0. C, 0. F DC 0-0V or 0 0mA 0 Bit, 9.7 mv, 0.09.5 ma Voltage: kω Current: 500Ω To IEC 7-- class K5-40 70 C (-40 58 F) <95% R.H. non-condensing To IEC 7-- and IEC 7-- class K and class K -40 80 C (-40 76 F) <95% R.H. non-condensing class M 004/08/EC 006/95/EC EN 60 70 EN 60 70 9 Emissions: EN 60 70- Immunity: EN 60 70- IP60 IP6 Safety Class III (IEC 6056) General Housing Materials: Cover, back part Filter material Dimensions (H x W x D):Transmitter case: Probe: Weight (incl. package) SDC-HT-08 SDC-HT-6 SDC-HT-4 PC+ABS (UL94 class V-0) PTFE coated μm pores 68 x 9 x 47 mm (.7 x.7 x.9 ) 4 x 77/57 mm ( 0.55 x /6.) 5g (7.9 oz.) 60g (9. oz.) 64g (9. oz.) %rh Relative humidity absolute accuracy K accuracy ±5 ±4 ± ± ± AES-HT-A5 AES-HT-A AES-HT-A ±0 0 0 0 0 40 50 60 70 80 90 00 %rh Figure : Max RH-tolerance at 5 C (77 F) per sensor type ±.0 ±.5 ±.0 ±0.5 ±0-40 -0 0 0 40 60 80 00 0 AES-HT-A5 AES-HT-A AES-HT-A C -4 68 04-40 40 76 48 F Figure : Max T-tolerance by sensor type Doc: 70-00-065, V.0, 050904 Vector Controls GmbH, Switzerland Page
68(.7) SDC-HT Dimensions mm (inch) 4 x 77 /57 (0.55 x / 6.) 47 (.9) 9 (.6) Mechanical design and installation The unit consists of three parts: The back part with the probe, the flange and the cover. Mounting location The transmitter should be installed on the duct in an area where the air stream is well mixed: Locate a supply air sensor two or three meters downstream from the nearest fan and coil. Mount the return air sensor close to the air inlet but downstream from a return fan if one is present. Warning about storage, packaging and usage environment The sensing part is a polymer, which measures the humidity in the ambient air. For proper sensor operation some mandatory precautions need to be taken during storage, packaging and usage. The transmitter and its sensing element should not be packaged, stored or used in out-gassing plastic materials, which could cause sensor contamination. In particular, it is recommended not to use any glue or adhesive tapes (Sellotape, Scotch-Tape, Tesa-Film, etc.) within the package or close proximity of the sensor. Foamed materials often cause contamination problems and should not be used to package the transmitter. Best packaging material is a simple cardboard box or a deep-drawn plastic case in a cardboard box. Installation. Drill a hole with a diameter of 6mm (5/8 ) in the air duct.. For installation of the transmitter directly on the duct: Drill two smaller holes for the self-tapping screws diagonal on a diameter of 9mm (.6 ). Tip: Use the housing as marking guide for the holes.. For installation of the transmitter with the flange: Drill two smaller holes for the self-tapping screws diagonal on a diameter of 60mm (. ). Tip: Use the flange as marking guide for the holes. 4. Open the single screw on the cover and remove cover. 5. Connect the conductors to the terminals of the back part according to wiring diagram. 6. Insert the probe in the hole; secure the back part to the duct with two self-tapping screws. 7. While in the open position, slide the two hooks of the cover into the latch at the left side of the back part. 8. Close the front part. 9. With a Philips-type screw driver of size #, carefully tighten the front holding screw to secure the cover to the back part. This screw is located on the front right side of the front part. There is no need to tighten the screw too much. Connection terminals 4V ADC G SDC-HT G0 U/I 4 U/I 0VAC -4VDC rh out T out : G Power supply 4 VAC, +4 VDC : G0 Power supply 0 VAC, -4 VDC : U JP = -, voltage output of humidity transmitter 0 0 V or 0 V (JP) : I JP = -, current output of humidity transmitter 0 0 ma or 4 0 ma (JP) 4: U JP = -, voltage output of temperature transmitter 0 0 V or 0 V (JP) 4: I JP = -, current output of temperature transmitter 0 0 ma or 4 0 ma (JP) Doc: 70-00-065, V.0, 050904 Vector Controls GmbH, Switzerland Page
G 4V G0 0V U/ I AO H U/ I AO T STATUS LED SDC-HT Output signal configuration The analog output signal type may be configured with a jumper for 0-0 VDC or 0-0 ma control signals. The jumpers are located next to the terminal connector of each analog output. See table below for jumper placement. The factory setting is to 0-0 VDC. The signal range may be set with JP for both analog outputs. JP will only operate if the output range specified with OP0 and OP0 or OP04 and OP05 is left at the default position of 0 00%. With any other setting the position of JP has no influence and the range defined with the output parameters applies. Signal Type JP, JP 0 0 V (-) 0 0 ma (-) Signal Range JP 0 0 V, 0 0 ma (-) 0 V, 4 0 ma (-) Jumper Settings JP, JP Signal type JP Signal range U / U 0-0V, -0V U, U: 0-0V I, I: 0-0mA I / I 0-0mA, 4-0mA U, U: -0V I, I: 4-0mA JP JP JP Status LED 4 OPA-S LED indicates status No light: either no power or sensing element is reversed. 5 sec blinking: Normal sec blinking: OPA or OPC connected sec blinking: Sensor element error Doc: 70-00-065, V.0, 050904 Vector Controls GmbH, Switzerland Page 4
SDC-HT Configuration parameters The transmitter can be adapted to fit perfectly into any application by adjusting the software parameters. The parameters are set with the operation terminals OPA-S or OPC-S. The OPA-S may also be used as remote indicator. Input configuration Parameter Description Range Default IP 00 TI: Celsius or Fahrenheit, C = OFF, F = ON ON, OFF OFF IP 0 TI: Samples taken for averaging control signal 55 0 IP 0 TI: Calibration -0 0 0 IP 0 TI: Minimum temperature -40 5 C/F 0 C IP 04 TI: Maximum temperature -40 5 C/F 50 C IP 05 H: Show Percent ON, OFF ON IP 06 H: Samples taken for averaging control signal 55 0 IP 07 H: Calibration -0 0% 0 Output configuration Parameter Description Range Default OP 00 AO: Humidity: Configuration of output signal: 0 0 0 = Feedback humidity input, = Feedback humidity minimum value = Feedback humidity maximum value OP 0 AO: Humidity: Minimum limitation of output signal 0 Max % 0% OP 0 AO: Humidity: Maximum limitation of output signal Min 00% 00% OP 0 AO: : Configuration of output signal: 0 0 0 = Feedback temperature input, = Feedback temperature minimum value = Feedback temperature maximum value OP 04 AO: : Minimum limitation of output signal 0 Max % 0% OP 05 AO: : Maximum limitation of output signal Min 00% 00% Replacing the sensing element Unscrew the filter cap of the immersion probe by holding the probe with one hand and turn the filter cap in counter clock wise direction with the other hand. Remove the filter cap Remove the sensor by pulling it out of the plug with the help of a pair of tweezers. Try not to touch the sensor element by hand. Observe orientation of the new sensor before plugging it into the connector. The front of the connector is unsymmetrical to prevent wrong placement. Make sure the black nipple is not in the way of the sensor plug. If it is turn the sensor plug 80. Replace the filter cap by placing it over the sensor and turning it in clockwise direction. Use reasonable torque to screw on the filter cap. Push the new sensor into the plug until a click is felt and there is no air between connector and sensor Doc: 70-00-065, V.0, 050904 Vector Controls GmbH, Switzerland Page 5