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Manual 35086
ProTech-GII with Math Functions
Woodward
36
Each speed input is designed to operate from its own speed probe.
Do not connect a speed probe to more than one input. This will
compromise the ability of the ProTech-GII to sense open wire
(passive mode only) and interfere with the minimum amplitude
sensitivity and accuracy.
When using open collector probes, verify that the signal is being
read properly at higher frequencies (>10 kHz). Long cable lengths
can significantly reduce the signal strength at higher frequencies. In
this case, add an external pull-up resistor of approximately 2 k
(0.25 W) from terminals 70 to 69 and verify that the signal is read
properly by the ProTech-GII.
Shielded cable is required when connecting to the speed input.
Relay Specifications
Table 2-6a. Independent Trip Relay Specifications
Number of Channels
2 (actuated simultaneously)
Output Type
SPST Solid-state, Normally Open
Current Rating
1 A
Voltage Rating
24 V (32 V max)
Isolation
500 Vac from output to chassis and output to all other circuits
Signal Cable Length
Must be limited to 1000 ft / 305 m (low capacitance 16 AWG / 1.3 mm² pair)
Table 2-6b. Voted Trip Relay Specifications
Number of Channels
2 (both channels actuated simultaneously), see wiring and installation
Output Type
Form C, dual SPDT
Contact Rating
8 A @ 220 Vac / 8 A @ 24 Vdc
Max. Switching Voltage
220 Vac / 150 Vdc
Max. Switching Power
2000 VA / 192 W
Isolation
1500 Vac from contact to chassis and contacts to all other circuits
Table 2-7. Alarm Relay Specifications
Output Type
SPST Solid-state, Normally Open
Current Rating
1 A
Voltage Rating
24 V (32 V max)
Isolation
500 Vac from output to chassis and output to all other circuits
Signal Cable Length
Must be limited to 1000 ft / 305 m (low capacitance 16 AWG / 1.3 mm²)
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