PCB Piezotronics IMI SENSORS 683A1 Installation And Operating Manual page 20

Pin Descriptions
Input Signal - Pins 1 to 6
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Pin 1 +ICP Sensor Excitation/Signal
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Pin 2 -ICP Sensor Excitation
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Pin 3 ICP Sensor Shield (if applicable)
Pin 4 + RV Output (Analog Sensor Signal)
Pin 5 - RV Output (Analog Sensor Signal)
Pin 6 No Connection
Relay Output - Pins 8 to 12
Pin 8 SP1 NO. (Normally Open 5 Amp Form A.)
Pin 9 SP1 NO.
Pin 10 SP2 NO. (Normally Open 5 Amp Form A.)
Pin 11 SP2 NO.
Pin 12 No Connection
AC/DC Power Unit - Pins 14 and 15
Pin 14 AC/DC Neutral. Neutral power supply line.
Pin 15 AC/DC Line. Live power supply line.
OPTIONAL TOP BOARD PINS
Analog Output - Pins 16 and 17
Pins 16 and 17 are the analog output pins on the optional output module.
Pin 16 Positive (+) analog output.
Pin 17 Negative (-) analog output.
Rear Panel Function – Pins 18 to 21
Pin 18 DIM. By connecting the display dim (DIM) pin to the COMMON pin, the display brightness setting is
halved.
Pin 19 COMMON. To activate the LOCK or DIM functions from the rear of the meter, the respective pins have to
be connected to the COMMON pin. This pin is connected to the internal power supply ground.
Pin 20 HOLD. By connecting the HOLD pin to the COMMON pin, the display reading is frozen, however, A/D
conversions continue. When the HOLD pin is disconnected from the COMMON pin, the correct reading is
displayed.
Pin 21 LOCK. By connecting the LOCK pin to the COMMON pin, the meter's parameters can be viewed but not
changed.
Top Board Secondary Relay Output – Pins 22 to 29
Quad 5A Form A Relays or Dual 10Amp Form C Relays.
Pin 22 SP1 (Quad 5A SPST Relay Option)
Pin 23 SP1 (Quad 5A SPST Relay Option), SP3 COMM (10A SPDT Additional Relay Option)
Pin 24 SP2 (Quad 5A SPST Relay Option), SP3 NC (10A SPDT Additional Relay Option)
Pin 25 SP2 (Quad 5A SPST Relay Option), SP3 NO (10A SPDT Additional Relay Option)
Pin 26 SP3 (Quad 5A SPST Relay Option)
Pin 27 SP3 (Quad 5A SPST Relay Option), SP4 COMM (10A SPDT Additional Relay Option)
Pin 28 SP4 (Quad 5A SPST Relay Option), SP4 NC (10A SPDT Additional Relay Option)
Pin 29 SP4 (Quad 5A SPST Relay Option), SP4 NO (10A SPDT Additional Relay Option)
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