Red Lion GEMINI 2 - Manual (Page 40)

GEMINI 1000 SENSOR INPUT CONNECTIONS & INPUT CONFIGURATION SWITCH SET-UP
The accompanying diagram shows the details of the count Input A and
magnetic pickup circuit. The schematic circuit for Input B is almost identical to
that of Input A, with the exception that Input B does not have the Magnetic
Pickup circuitry paralleled with it. The four switches used to set up Input A and
the Magnetic Pickup are designated S1, S2, S3, and S4. To set up Input B; use
switches S5, S6, and S7. 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 INPUT.
S2 - SNK: Provides a 7.8 K pull-up resistor for sensors with sinking
outputs.
SRC: Provides a 3.9 K pull-down resistor for sensors with sourcing
outputs.
S3 - HI FRQ: Removes damping capacitor and allows operation up to 10
KHz. Minimum count ON/OFF times - 50 usec.
LO FRQ: Connects damping capacitor for switch contact debounce.
Limits count speed to 100 cps max. Min. count pulse ON/OFF time - 5
msec.
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
IL
= 5.5 V, V
IH
= 7.5 V)
LO BIAS: Sets input trigger levels to the low range to accept logic
pulses with 0 to 5 V swings. (V
IL
= 1.5 V, V
IH
= 3.75 V)
S5 - Same as S2, for Input B - does not affect Magnetic Pickup Input.
S6 - Same as S3, for Input B.
S7 - Same as S4, for Input B.
S8 - DIS. RST.: Disables front panel reset.
EN. RST.: Enables front panel reset if “Operator Accessible
Functions” mode (Code 66) has Reset enabled.
–38–
CHAN.
B
CHANNEL
A