Dwyer SCD-8 - Manual

SCD8000/8100 Temperature Controller
Instruction Sheet
Thank you very much for choosing SCD8000/8100 series temperature controller. Please read this instruction sheet carefully
before using your SCD8000/8100 to ensure proper operation. Keep this instruction sheet handy for quick reference.
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1 Precaution
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DANGER! CAUTION! ELECTRIC SHOCK!
SCD8000/8100 is an OPEN-TYPE device and therefore should be installed in an enclosure free of airborne dust, humidity, electric shock and vibration. The enclosure should prevent non-maintenance staff from operating
the device (e.g. key or specific tools are required for opening the enclosure) in case danger and damage on the
device may occur.
1. Prevent dust or metallic debris from falling into the device and cause malfunctions. DO NOT modify or uninstall the circuit
board of SCD8000/8100 without being permitted. DO NOT use empty terminals.
2. Keep away from high-voltage and high-frequency environment during the installation in case of interference. Prevent using
the device in premises which contain:
(a) dust or corrosive gas; (b) high humidity and high radiation; (c) shock and vibration.
3. The power has to be switched off when wiring or changing the temperature sensor.
4. When installing the circuit board of the accessory, please make sure the power of the main unit is switched off and insert
the accessory into the correct slot on the main unit.
5. Make sure to use compensation wire which matches the thermocouple or platinum resistance when extending or
connecting the thermocouple or platinum resistance.
6. Keep the wire as short as possible when wiring a sensor to the controller. Separate the power cable and load wire in order
to prevent interference and induced noise.
7. Make sure the power cables and signal device are installed correctly before switching on the power; otherwise serious
damage may occur.
8. DO NOT touch the terminal or repair the device when the power is on; otherwise an electric shock may occur.
9. Please wait for 1 minute after the power is switched off to allow the capacitor to discharge and DO NOT touch the internal
wiring within this period.
10. DO NOT touch the internal terminal when SCD8000/8100 is either switched on or off in case you may damage the circuit.
11. Please place SCD8000/8100 with other heating objects (e.g. power supply) within proper distance while installing
SCD8000/8100.
2 Functions & Electrical Specifications
Power input DC 24V, isolated switching power supply
Voltage range 90% ~ 110% rated voltage
Power consumption Max. 10W + 3W × number of SCD2000 controllers connected in parallel (Max. 7)
Thermocouple: K, J, T, E, N, R, S, B, L, U, TXK
Input sensor
Platinum resistance: Pt100, JPt100, Cu50
Sampling cycle Thermocouple or platinum resistance: 1.0 second/all input
Control method PID, PID programmable, manual, ON/OFF
Relay output: SPST, Max. AC 250V load, 3A resistive load
Voltage pulse output: DC 24V, Max. 40mA current output
Current output: DC 4 ~ 20mA output (resistive load < 500Ω); for OUT1 and OUT2 only
Output accessories
(optional)
Analog voltage output: 0 ~ 10V (resistive load > 1,000Ω); for OUT1 and OUT2 only
Output functions Control output, alarm output or proportional output (proportional output is only applicable in the
model with linear voltage and current output for OUT1, OUT2)
Alarm modes 12 alarm modes available
Communication RS-485 digital communication; supports baud rate 2,400bps ~ 115,200bps
Communication
protocol Supports Modbus ASCII/RTU
Extension port The extension port transmits 24V power supply and communication signals to extension module
SCD2000.
Vibration resistance 10 ~ 55Hz 10m/s 2 3 axes 10mins
Shock resistance Max. 300m/s 2 3 axes 6 directions, 3 times each
Ambient temperature 0°C ~ +50°C
Storage temperature
-20°C ~ +65°C
Operation altitude < 2,000m
Ambient humidity 35% to 85% RH (non-condensing)
Pollution degree 2
3 Product Profile & Outline
SCD8000/8100
1 I/O terminals
2 Status LED
3 Display and setup unit
4 DIN rail clip
5 Power input port
6 RS-485 communication port
7 Extension module fixing clip
8 Extension port
4 Panel Layout
5 Input
The standard SCD8000/8100 main unit is attached with 4 channels of inputs. You can purchase additional SCD-4T or SCD-4R
to expand the number of input channels. SCD8000/8100 supports maximum 8 channels of inputs which belong to group INA
and group INB. Each group possesses 4 input channels.
SCD8000/8100 series supports the following input sensors:
Input Sensor Type Register Value Range
For SCD8100 / SCD-4R
Temperature measurement resistance (Cu50) 13 -50 ~ 150°C
Platinum resistance (Pt100) 12 -200 ~ 600°C
Platinum resistance (JPt100) 11 -20 ~ 400°C
For SCD8000 / SCD-4T
Thermocouple TXK type 10 -200 ~ 800°C
Thermocouple U type 9 -200 ~ 500°C
Thermocouple L type 8 -200 ~ 850°C
Thermocouple B type 7 100 ~ 1,800°C
Thermocouple S type 6 0 ~ 1,700°C
Thermocouple R type 5 0 ~ 1,700°C
Thermocouple N type 4 -200 ~ 1,300°C
Thermocouple E type 3 0 ~ 600°C
Thermocouple T type 2 -200 ~ 400°C
Thermocouple J type 1 -100 ~ 1,200°C
Thermocouple K type 0 -200 ~ 1,300°C
 Note: The default setting in SCD8000 is “thermocouple K type”. The default setting in SCD8100 is “Pt100".
Communication address: Input sensor types at H10A0 ~ H10A7; input upper limits at H1010 ~ H1017; input lower limits at
H1018 ~ H101F.
6 Output
SCD8000/8100 supports maximum 16 channels of outputs, belonging to output groups OUT1, OUT2, SUB1 and SUB2, each
group with 4 channels. See the explanations below for how input channels correspond to output groups.
ƒ
Without group INB (4 channels of input): Every channel corresponds to 2 groups of output and 2 groups of alarms. OUT1 and
SUB1 are for control output, and OUT1 can be used for proportional output. OUT2 and SUB2 are fixed for alarm output.
ƒ With group INB (8 channels of input): Every channel is paired with 2 groups of outputs. OUT1 and OUT2 are used for control
output or proportional output of CH1 ~ CH8. SUB1 and SUB2 are used for control output or alarm output.
See Table 1 for the relations between input and output.
4 channels of input 8 channels of input
Output Group INA (CH1 ~ CH4) INA (CH1 ~ CH4) INB (CH5 ~ CH8)
OUT1 Main control output or proportional
output
Main control output or proportional
output No corresponding output
OUT2 Alarm 1 output No corresponding output Main control output or proportional
output
SUB1 Control output Control output or alarm output No corresponding output
SUB2 Alarm 2 output No corresponding output Control output or alarm output
Table 1
 Note: SUB1 and SUB2 do not support SCD-46 and SCD-45. Please install the optional output modules you purchase into
the correct slot.
Communication Address of Output & How to Set up Parameters:
See Table 2 for the communication addresses of output and Table 3 for the definition of the value in the address.
INA INB
CH1 CH2 CH3 CH4 CH5 CH6 CH7 CH8
OUT1, OUT2 H10A8 H10A9 H10AA H10AB H10AC H10AD H10AE H10AF
SUB1, SUB2 H10B0 H10B1 H10B2 H10B3 H10B4 H10B5 H10B6 H10B7
Table 2
Value = 0 Value = 1 Value = 2 Value = 3
OUT1, OUT2** Heating control Cooling control Proportional output Disable output
SUB1, SUB2** Heating control Cooling control Alarm output* Disable output
Table 3
* When there are only 4 channels of inputs, SUB1 cannot be used for alarm output but heating/cooling control only.
** When there are only 4 channels of inputs, OUT2 and SUB2 cannot be set up by the user but set up automatically as "alarm
output” by the controller.
Control Output:
SCD8000/8100 offers PID control, ON/OFF control, manual control and programmable PID control. Control output methods are
set at address H10B8 ~ H10BF (default = 0: PID), PID parameters at H1028 ~ H105F, ON/OFF parameters at H1058 ~ H106F,
and manual control parameters at H1070 ~ H107F.
Alarm Output:
SCD8000/8100 offers 12 alarm modes. The alarm modes are set up at address H10C0 ~ H10C7, upper limits at H1080 ~
H1087 and lower limits at H1088 ~ H108F.
SV Alarm Mode Alarm Output Operation
0 No alarm Off
1
Alarm output is enabled when the temperature reaches upper and lower
limits: The alarm will be enabled when PV exceeds SV + AL-H or falls below
SV – AL-L. ON
OFF
AL-L SV AL-H
2 Alarm output will be enabled when the temperature reaches the upper limit:
The alarm will be enabled when the PV exceeds SV + AL-H. ON
OFF
SV AL-H
3 Alarm output will be enabled when the temperature reaches the lower limit:
The alarm will be enabled when the PV falls below SV – AL-L. ON
OFF
AL-L SV
4 Alarm output will be enabled when the PV is between SV + AL-H and SV –
AL-L. ON
OFF
AL-L SV AL-H
5
Alarm output will be enabled when the temperature reaches the absolute
value of the upper and lower limits: The alarm will be enabled when the PV
exceeds AL-H or falls below AL-L. ON
OFF
AL-L AL-H
6
Alarm output will be enabled when the temperature reaches the absolute
value of the upper limit: The alarm will be enabled when the PV exceeds
AL-H. ON
OFF
AL-H
7
Alarm output will be enabled when the temperature reaches the absolute
value of the lower limit: The alarm will be enabled when the PV falls below
AL-L. ON
OFF
AL-L
8 Upper/lower limit standby alarm: The alarm will be enabled when the PV
reaches SV and further exceeds SV + AL-H or falls below SV – AL-L. ON
OFF
AL-L AL-H SV
9 Upper limit standby alarm: The alarm will be enabled when the PV reaches
SV and further exceeds SV + AL-H. ON
OFF
SV AL-H
10 Lower limit standby alarm: The alarm will be enabled when the PV reaches
SV and further falls below SV – AL-L. ON
OFF
AL-L SV
11 Upper limit hysteresis alarm: The alarm will be enabled when the PV exceeds
SV + AL-H. The alarm will be disabled when the PV falls below SV + AL-L.
ON
OFF
AL-L AL-H
12
Lower limit hysteresis alarm: The alarm will be enabled when the PV falls
below SV – AL-H. The alarm will be disabled when the PV exceeds SV –
AL-L. ON
OFF
AL-L AL-H
7 LED Display
PWR: On B SCD8000/8100 is powered.
RUN: On B Any of the channel is executing.
COM: Flashing B Communication in progress
ERR: Indicating errors (red)
ERR LED is on indicates one of the following errors occur, and the output has to be disabled.
1. Memory EEPROM error.
2. Any of the input points is not connected.
3. Any of the input points exceeds the setup range.
4. Any of the input temperatures has not been stabilized.
8 Synchronous Communication Protocol & Auto ID Setup
This function allows the auto setup of communication protocol in extension module SCD2000 following the communication
protocol set in the SCD8000 main unit. The station IDs of SCD2000 decrease. See below for the steps.
1. Set the auto communication ID of SCD8000 as “1” (communication address: H10F8).
2. Switch off SCD8000. Connect SCD8000 with extension module SCD2000 and switch on SCD8000 again.
3. Default communication protocol: 9,600bps, 7 bits, Even, 1 stop bit, communication address = 01.
4. This function will consume 3 ~ 5 seconds more when you switch on SCD8000.
9 RS-485 Communication
1. SCD8000/8100 supports baud rates 2,400/4,800/9,600/19,200/38,400/57,600/115,200 bps and does not support
communication format 7, N, 1/8, E, 2/8, O, 2. Communication protocol = Modbus ASCII or RTU.
2. Function codes: H03 = read maximum 8 words in the register; H06 = write 1 word into the register.
3. Address and contents: Every parameter has 2 communication addresses. One is numbered by the function of the parameter,
and the other is by the order of channel (as shown in the table below).