WIKA CF2S - Manual (Page 42)

Operating Instructions Temperature Indicating Controller CF2S
V1.2 • 08/2004 - 42 -
12.2 Optional specifications
Alarm 2 output [2AS]
The alarm action point is set by ±deviation to main setting (except Process value alarm).
[When the alarm action is set as energized]
When the input exceeds the range, the output turns ON or OFF
(in the case of High/Low limit range alarm).
[When the alarm action is set as deenergized]
The output acts conversely.
One of the alarms can be selected by rotary switch and DIP switch from 14 types
of alarm: High limit alarm, Low limit alarm, High/Low limits alarm, High/Low limit
range alarm, Process high alarm and Process low alarm and the standby function
is applied to them respectively, as well as No alarm and Pattern end output.
Setting accuracy : Within ±0.3% of input range full scale ±1digit
Action
: ON/OFF action
Hysteresis setting range, 0.1 to 100.0°C (°F)
Output : Relay contact 1a
Control capacity, 250Vac 3A (resistive load)
250Vac 1A (inductive load cosø=0.4)
(However, A1 and A2 common terminal, Max. 3A)
Loop break alarm output [2AR]
Detects the breaking status on the loop such as heater burnout, sensor burnout or
the operation end trouble.
Output Relay contact 1a
Control capacity, 250Vac 3A (resistive load)
250Vac 1A (inductive load, cosø=0.4)
Alarm 2 output and Loop break alarm output [2AL]
When option [2AL] Alarm 2 output and Loop break alarm output is selected,
the output terminal is common.
Output Relay contact 1a
Control capacity, 250Vac 3A (resistive load)
250Vac 1A (inductive load, cosø=0.4)
Serial communication [CR2 or CR5]
The options [Code; 2AS, 2AR, 2AL and SM2] cannot be applied in combination with this option.
Alarm 2 (A2) is applied, however, it does not involve the alarm output but
provides the functions for indication and communication.
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 19200bps
(selectable by key operation)
Data format Start bit : 1
Data bit : 7
Parity : Even parity
Stop bit : 1
Communication protocol: WIKA standard protocol or
the protocol based on Modbus (selectable by key)
(When selecting the protocol based on Modbus,
digital external setting is not available.)