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
