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Q7002A,B,C INTERFACE MODULES
1-5 Vdc
4-20 mA
L2
L1
(HOT)
L1
1
(HOT)
L2
2
PWM
CONTACT
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
2
THE POWER SUPPLY CAN BE 24 VAC (AS SHOWN) OR 24 VDC.
Fig. 6. Q7002C wiring with separate
24 Vac power supplies.
1-5 Vdc
4-20 mA
L2
L1
(HOT)
1
2
PWM
CONTACT
1
PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION
AS REQUIRED.
2
THE POWER SUPPLY CAN BE 24 VAC (AS SHOWN) OR 24 VDC.
Fig. 7. Q7002C wiring with a common power supply.
SETTINGS AND ADJUSTMENTS
Calibration
IMPORTANT
The Q7002A is not field-adjustable.
Q7002B
Calibrate the device as follows:
1. Set the output (OUT) jumper to voltage (V) or current
(MA) to match desired output.
2. Set the INPUT and REF jumpers according to Table 1.
3. Verify ACT jumper is set to direct (D) or reverse (R).
The device is shipped with the ACT jumper set to D.
4. Verify span jumper (SPN) is set to LO. The device is
shipped with the SPN jumper set to LO.
5. Turn SPAN potentiometer clockwise
6. Remove and set aside both Z1 jumpers.
NOTE: The input signal does not affect the ZERO1
potentiometer adjustment.
63-2551
Q7002C
VOLTS OUT
MA OUT
COM
24V PWR
SIG IN +
SIG IN -
M13271
Q7002C
VOLTS OUT
MA OUT
COM
24V PWR
SIG IN +
SIG IN -
M13272
25 turns.
7. Trim ZERO1 potentiometer to minimum desired output
value.
8. Reinstall both Z1 jumpers.
9. Set Z2 jumper to LO. The device is shipped with the Z2
jumper set to LO.
10. Apply the minimum input signal.
11. Trim the ZERO2 potentiometer to the same value used
in step 7.
12. If the desired value cannot be achieved, remove Z2
jumper and repeat step 11.
NOTE: If the desired value remains unachievable,
place the Z2 jumper in the HI position and
repeat step 11.
13. Apply the maximum input signal.
14. Trim the SPAN potentiometer to the maximum output
value.
15. If the desired value cannot be reached, move the SPN
jumper from LO to HI.
16. Return to step 10 and repeat steps until both the
minimum and maximum output values are correct.
NOTE: Typically one repetition of steps 10 through 15
is sufficient.
17. Apply an input signal at the midpoint of the input span.
18. Verify that the output is at the midpoint of the output
range.
Q7002C
Voltage Only Output
Calibrate the device as follows:
1. Determine the minimum and maximum voltage output
required.
2. Determine the minimum mA calibration output with the
following formula:
Minimum Output (mA) = 20 mA x (Desired Minimum
Volts) / (Desired Maximum Volts)
3. Apply minimum input pulse signal.
4. Set MA ZERO potentiometer to the value determined in
step 2.
5. Using a signal generator, apply maximum input pulse
signal.
6. Set MA SPAN potentiometer to 20 mA.
7. Set the VOLT ADJ potentiometer to the desired
maximum voltage.
NOTE: The device calibrates the minimum voltage
automatically according to the ratio of mA
output extremes.
EXAMPLE: 4-20 mA signal produces a ratio of 5 to 1.
As a result, with maximum voltage set to
10V, the device sets the minimum to 2V.
Current and Voltage Output or Current Only Output
Calibrate the device as follows:
1. Apply minimum input pulse signal.
2. Set MA ZERO potentiometer to the desired minimum
mA output.
3. Apply maximum input pulse signal.
4. Set MA SPAN potentiometer to the desired maximum
mA output.
6
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