Mitsubishi Electric CAHV-R450YA-HPB Service Manual page 101

[ VII Control ]
(8) Setting the water temperature using analog signal input
• When dip switch SW5-7 is set to ON (Enable external input) and item code 1051 is set to "0", the target water
temperature varies with the preset temperatures A and B and the type of analog input signal.
• When the water temperature setting input signal type is set to 0 (4-20 mA)
• External analog input signal of 4 mA: Preset temp. A (Item code 11)
• External analog input signal of 20 mA: Preset temp. B (Item code 13)
• External analog input signal of between 4 and 20 mA: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
• When the water temperature setting input signal type is set to 1 (0-10 V)
• External analog input signal of 0 V: Preset temp. A (Item code 11)
• External analog input signal of 10 V: Preset temp. B (Item code 13)
• External analog input signal of between 0 and 10 V: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
• When the water temperature setting input signal type is set to 2 (1-5 V)
• External analog input signal of 1 V: Preset temp. A (Item code 11)
• External analog input signal of 5 V: Preset temp. B (Item code 13)
• External analog input signal of between 1 and 5 V: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
• When the water temperature setting input signal type is set to 3 (2-10 V)
• External analog input signal of 2 V: Preset temp. A (Item code 11)
• External analog input signal of 10 V: Preset temp. B (Item code 13)
• External analog input signal of between 2 and 10 V: the preset temperature will be linearly interpolated.
Preset temp B
Preset temp A
HWE22020
4 mA 20 mA
0 V 10 V
1 V 5 V
2 V 10 V
Input current
Input voltage
Input voltage
Input voltage
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GB