64 of 282 M-SV-001-EN Rev. G
• LIQT – Pin 9 & 10 – Liquid temperature sensor input
• Refer to the Applications and Installation Manual for thermistor specifications
J3 – Input/output
• RUN – Pin 1 & 2 – compressor running indicator output. Normally Open, closes when RPM
reaches specified RPM set in BMCC
• ANALOG – Pin 3 & 4 – Output dependent on BMCC setting. 0-5V or 0-10V set by jumper JP1
• ENTRY – Pin 5 & 6 – Entering chilled fluid temperature sensor input
– Use ENTRY jumper when no sensor connected
– Refer to the Applications and Installation Manual for thermistor specifications
• LEAVE – Pin 7 & 8 – Leaving chilled fluid temperature sensor input
– Use LEAVE jumper when no sensor connected
– Refer to the Applications and Installation Manual for thermistor specifications
J4 – EXV 1 & EXV 2 Control – 15V output
• EXV1 – Pin 6 to 9
• EXV2 – Pin 1 to 4
J5 – Liquid Level input
• LIQ LEV 1 – Pin 4 to 6 – Liquid level sensor driving the electronic expansion valve1 (EXV1)
• LIQ LEV 2 – Pin 1 to 3 – Liquid level sensor driving the electronic expansion valve2 (EXV2)
• Refer to the Applications and Installation Manual for further information
• Jumpers JP5 (LIQ LEV 1) & JP6 (LIQ LEV 2)
– For use with a voltage-type level sensor (with 15V supply and 0-5V signal)
» Install jumpers between LVL pins 2a and 3a, and Pins 2b and 3b
» Connect the sensor leads to the “+,” “S,“ and “-“ terminals on the Compressor I/O Board
(consult vendor documentation for sensor lead identification)
– For use with a resistive-type float sensor
» Install jumpers between LVL Pins 1a and 2a, and Pins 1b and 2b
» Connect the sensor leads to the “-” and “S” terminals on the Compressor I/O Board
– When using Superheat Control (no sensor connected)
» Install jumpers between LVL pins 2a and 3a, and Pins 2b and 3b
J6 – RS-232 I/O Cable connection
• Communication port with Backplane
J7 – RS-232 external communication port
• Use Jumper JP7 only to supply power at the 9-pin connector
J8 – External sensor inputs
• Spare T: External temperature sensor input
– Refer to the Applications and Installation Manual for thermistor specifications
• Spare P: External pressure sensor input
– Refer to the Applications and Installation Manual for pressure sensor specifications
– Refer to the OEM Programming Manual for software implications
D1 to D8 – EXV LED indicators
• Red: 2 sets of 4 LEDs for EXV 1 & EXV 2
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