York SSS 7L-B, Operation Manual

Page: 19 / 40

JOHNSON CONTROLS
19
SECTION 3 – LOGIC/TRIGGER BOARD
FORM 160.00-O2
ISSUE DATE: 04/30/2019
3
TABLE 4 - LOGIC/TRIGGER BOARD INPUTS AND OUTPUTS
JUMPER DESCRIPTION
J1 PINS
J1-1 and 2
Phase “A” motor current input from current transformer (2T). AC voltage is read with digital voltmeter across
resistor R76 (top of R76 is GND). Voltage read should be:
RMS Motor Current =
(AC Voltage Measured/3.01) x CT RATIO
CT ratio = 700(7L), 1400(14L), 2600(26L), 3300(33L)
J1-3 and 4
Phase “B” motor current input from current transformer (3T). AC voltage is read across resistor R77
(top of R77 is GND). Refer to Jl-1 and 2 to calculate current.
J1-5 and 6
Phase “C” motor current input from current transformer (4T). AC voltage is read across resistor R78
(top of R78 is GND). Refer to J1-1 and 2 to calculate current.
J1-7 Part of current scaling feedback, and determining the HP of the starter.
J1-8
Part of current scaling feedback, and determining the HP of the starter.
J1-9 Part of current scaling feedback, and determining the HP of the starter.
J1-10 Ground, used as part of the current scaling feedback.
J1-11 Part of current transformer connector interlock circuit.
J1-12 Part of current transformer connector interlock circuit.
J2 PINS
J2-1
Phase “A” SCR assembly thermistor input. Refer to Table 6 for voltages and temperatures.
(Utilize 10K ohm at 25°C thermistors.)
J2-2 See J2-1.
J3-PINS
J3-1 Phase “B” SCR assembly thermistor input. See J2-1 voltage.
J3-2 See J3-1.
J4-PINS
J4-1
Phase “C” SCR assembly thermistor input. See J2-1 for voltage.
J4-2 See J4-1.
J5-PINS
J5-1 115VAC neutral input.
J5-2
115VAC from the secondary of the 1T.
J6-PINS
J6-l Phase “A” Positive SCR gate output. .55-2 VDC as measured to J6-2 when the starter is running.
J6-2 Phase “A” Positive SCR cathode. See J6-1.
J7-PINS
J7-1 Phase “A” Negative SCR gate output. .55-2 VDC as measured to J7-2 when the starter is running.
J7-2 Phase “A” Negative SCR cathode. See J7-1.
J8-PINS
J8-l Phase “B” Positive SCR gate output. .55-2 VDC as measured to J8-2 when the starter is running.
J8-2 Phase “B” Positive SCR cathode. See J8-1.
J9-PINS
J9-1 Phase “B” Negative SCR gate output. .55-2 VDC as measured to J9-2 when the starter is running.
J9-2 Phase “B” Negative SCR cathode. See J9-1.
J10-PINS
J10-L
Phase “C” Positive SCR gate output. .55-2 VDC as measured to J10-2 when the starter is running.
J10-2 Phase “C” Positive SCR cathode. See J10-1.