Set points 3 & 4 and selecting DPDT trip
THE EFFECT OF TURNING B SWITCHES ON
Turn on B to...
B1 LATCH set point 3 on alarm
B2 ACTUATE relay 4 simultaneously with relay 2, creating two Form
C contacts for set point 2 (DPDT relay).
B3 LATCH set point 4 on alarm
B4 ACTUATE relay 3 simultaneously with relay 1, creating two Form
C contacts for set point 1 (DPDT relay).
B5 DE-ENERGIZE relay 3 on alarm
B6 DE-ENERGIZE relay 4 on alarm
B7 ACTUATE set point 4 on overspeed.
B8 ACTUATE set point 3 on overspeed.
Set points 1 & 2: 0–5 & 0–10 Vdc proportional output
THE EFFECT OF TURNING C SWITCHES ON
Turn on C to...
C1 Change proportional output to 0-5 Vdc*. Confirm C2 is OFF.
C2 Changes proportional output to 0-10 Vdc*. Confirm C1 is OFF.
C3 DE-ENERGIZE relay 2 on alarm.
C4 ACTUATE relay 1 on overspeed, non-latch.
C5 LATCH relay 1 on alarm.
C6 LATCH relay 2 on alarm.
C7 ACTUATE relay 2 on overspeed, non-latch.
C8 DE-ENERGIZE relay 1 on alarm.
* Requires recalibration.
26
Chapter 4
EXAMPLE: To change
the proportional
output to 0–10 Vdc,
and set relay 2 to
actuate, energize,
and latch on
overspeed, turn on
C2, C6, and C7.
EXAMPLE: To set
relays 3 and 4 to
actuate, de-energize,
and latch on
overspeed, turn on
B1, B3, B5, B6, B7,
and B8.
t the proportional
output is 4-20 mA
t relays 1 and 2 are
energized,
underspeed
t non-latched
WHEN ALL C
SWITCHES ARE OFF
t relays 3 and 4 are
energized,
underspeed
t non-latching
t all relays are SPST
WHEN ALL B
SWITCHES ARE OFF
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