WIKA CF1H - Manual (Page 68)

Operating Instructions Temperature Indicating Controller CF1H
V 1.2
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01/2007 - 68 -
Heating/Cooling control output [DR2, DS2 or DA2]
Heating/Cooling control output (D 2) is not available with a combination of
Alarm 2 output (A2), Loop break alarm output (LA) or Insulated power output [P24].
The specifications of heating side are the same as the Main output.
Cooling side proportional band: Multiplying factor to the heating side proportional
band is 0.0 … 10.0.
(ON/OFF action when setting the value to 0.0.)
Cooling side proportional cycle: 1 … 120 s
Overlap band/Dead band
Setting range: Heating proportional band converted value
When thermocouple or RTD input, –199.9 … 999.9 °C (°F)
When DC input, –1999 … 9999 (Decimal point place follows the selection.)
Output [DR2] Relay contact 1a
Control capacity, 250 V AC, 3 A (resistive load)
250 V AC, 1 A (inductive load cosø=0.4)
[DS2] Non-contact voltage (for SSR drive)
12 +2
0 V DC maximum 40 mA DC (short circuit protected)
[DA2] Current
4 … 20 mA DC (Isolation type)
Load resistance: Maximum 550 Ω
Cooling action mode selection function:
Key selectable, Air cooling (Linear characteristic),
Oil cooling (1.5th Power of characteristic) or Water cooling (2nd power of characteristic).
Transmission output [TA4 or TV1]
Converting the value (Process variable transmission, Main setting value transmission or Main output
manipulating value transmission) to analog signal every 0.125 seconds, it outputs the value in current
or voltage.
Transmission output (Process variable, Main setting value or Main output manipulating value) is key
selectable.
Resolution 1/10000
Current (TA4) 4 … 20 mA DC (load resistance maximum 500 Ω)
Voltage (TV1) 0 … 1 V DC (load resistance minimum 100 k Ω)
Output accuracy Within ±0.3 % of full scale
Serial communication [CR2 or CR5]
The following operations can be executed from the external computer.
(1) Reading and setting of the Main setting value, PID values and various setting values.
(2) Reading of the input value and the action status.
(3) Change of the functions.
Communication circuit Based on EIA RS-485 [Option code: CR5]
Based on EIA RS-232C [Option code: CR2]
Communication method Half-duplex communication start-stop synchronous
Data transfer rate 2400, 4800, 9600 and 19200 bps
(selectable by key operation)
Data format Start bit : 1
Data bit : 7
Parity : Even parity
Stop bit : 1