Description
The TRB series combines an isolated, 8 A electromechanical
relay output with digital timing circuitry. False trigger of
the TRB by a transient is unlikely because of the complete
isolation of the circuit from the line prior to initiation. The
initiate contact is common to one side of the line and may be
utilized to operate other loads. Installation is easy due to the
TRB’s industry standard 8- or 11-pin plug-in base wiring.
Operation (Delay-on-Break)
Input voltage must be applied before and during timing. Upon
closure of the initiate switch, the output relay energizes. The
time delay begins when the initiate switch is opened (trailing
edge triggered). The output remains energized during timing.
At the end of the time delay, the output de-energizes. The
output will energize if the initiate switch is closed when input
voltage is applied.
Reset: Reclosing the initiate switch during timing resets the
time delay. Loss of input voltage resets the time delay and
output.

FEATURES BENEFITS
Complete isolation of
circuit from line No false trip due to transients
Industry standard 8 or
11-pin connection
Provides easy installation and field
replacement
Isolated, 8 A, SPDT or
DPDT output contacts
Allows control of loads with independent
voltage sources
Digital circuitry Repeat accuracy +/- 2 %