Red Lion GEMINI 52 User Manual

Page 39

SENSOR INPUT CONNECTIONS & INPUT CONFIGURATION

SWITCH SET-UP

The accompanying diagram shows the details of the logic and magnetic

pickup circuitry. The four switches used to set up Logic Input A and Magnetic

Pickup A are designated S1, S2, S3, and S4. The four switches used to set up

Logic Input B and Magnetic Pickup B are designated S5, S6, S7, and S8. The

functions of these switches are as follows:

S1 - MAG: Enables the Magnetic Pickup terminal to be used.

LOGIC: Disables the Magnetic Pickup Input.

Note: SWITCH S2 MUST BE IN THE “SNK” POSITION FOR

MAGNETIC PICKUP OPERATION.

S2 - SNK: Provides a 7.8 K pull-up resistor for sensors with current sinking

outputs.

SRC: Provides a 3.9 K pull-down resistor for sensors with current

sourcing outputs.

S3 - HI FRQ: Removes damping capacitor and allows operation up to the

max. count frequency. Min. count ON or OFF time - 50 usec.

LO FRQ: Connects damping capacitor for switch contact debounce.

Limits count speed to 100 cps max. Min. count pulse ON or OFF time -

5 msec. (See Note 2.)

S4 - HI BIAS: Sets input trigger levels at mid-range to accept outputs from

2-wire proximity sensors, resistive photo-cells, and logic pulses with

full 0 to +12 V swings. (V

= 5.5 V, V

= 7.5 V, See Note 3.)

LO BIAS: Sets input trigger levels to the low range to accept logic

pulses with 0 to 5 V swings. (V

= 1.5 V, V

= 3.75 V, See Note 3.)

S5 - Same as S1, for Magnetic pickup B and Logic Input B.

S6 - Same as S2, for Magnetic pickup B and Logic Input B.

S7 - Same as S3, for Logic Input B.

S8 - Same as S4, for Logic Input B.

S9 - DIS. RST.: Disables front panel Reset button, “R”.

EN. RST.: Enables front panel Reset button “R”, if “Operator

Accessible Functions” mode (code 66) has reset enabled.

S10 - Not used.

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Note: The circuitry for Channel B (Input B and Mag. Pkup.) is identical to

that shown for A.

CHAN.

CHANNEL