General Purpose Electronic Timers and Counters

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Bulletin 700-HR Dial Timing Relay

Nomenclature

Timing Charts

Mode A — ON-Delay

a. Needs continuous input power applied.

b. Timing is initiated by the leading edge of the start signal.

c. Contacts change state after timing is complete.

d. Additional start signals during timing don't reset timing or contacts.

e. When the input power is removed contacts return to shelf state.



Mode B — Repeat Cycle, Off Start

a. Need continuous input power applied.

b. Timing is initiated by the leading edge of the start signal. Additional start signals during timing do not reset timing or contacts.

c. For the first time period the contacts remain in their shelf state. When that time period is complete contacts change state for the same time period (time on = time off).

d. This cycle repeats itself until input power is removed or reset signal is applied. When the input power is removed or reset signal is applied contacts return to the shelf state.



Mode B2 Repeat Cycle, On Start

a. Need continuous input power applied.

b. Timing is initiated by the leading edge of the start signal. Additional start signals during timing do not reset timing or contacts.

c. For the first time period the contacts change state. When that time period is complete contacts return to the shelf state for the same time period (time on = time off).

d. This cycle repeats itself until input power is removed or reset signal is applied. When the input power is removed or reset signal is applied contacts return to the shelf state.



Mode C — Watchdog monitor (Trigger = Signal On/Off)

a. Need continuous input power applied.

b. Contacts change state immediately when start signal is applied or when start signal is removed (only if timing cycle was complete).

c. Timing is initiated at the leading edge of the start signal. After the first timing cycle is complete, timing is initiated by the trailing edge of the start signal.

d. At the end of the time period contacts return to the shelf state.

e. Relay timing is reset when additional start signals are applied while the relay is timing. Contacts remain in energized state.

f. When the input power is removed contacts return to the shelf state.



Mode D — Off-Delay (Trigger=Signal Off)

a. Need continuous input power applied.

b. Contacts change state immediately when start signal is applied.

c. Timing is initiated by the trailing edge of the start signal.

d. At the end of the time period contacts return to the shelf state.

e. Relay timing is reset when additional start signals are applied while the relay is timing. Contacts remain in energized state.

f. When the input power is removed contacts return to the shelf state.



Mode E — One-Shot (Trigger=Signal On) 700-HR52, -HRV, and -HRT6

a. Need continuous input power applied.

b. Timing is initiated by the leading edge of the start signal.

c. Contacts change state immediately when start signal is applied.

d. At the end of the time period contacts return to the shelf state.

e. Relay timing is reset when additional start signals are applied while the relay is timing. Contacts remain in energized state.

f. When the input power is removed contacts return to shelf state.



Mode E — One-Shot (Trigger = Power On) 700-HRS, -HRP, and -HRT4

a. Need continuous input power applied.

b. Timing is initiated when the input power is applied.

c. At the end of the time period contacts return to the shelf state.

d. Relay timing is reset when input power is removed.



Mode J — Delayed One-Shot (Trigger=Power On)

a. Need continuous input power applied.

b. No start signal applied.

c. Timing is initiated when input power is applied.

c. Contacts change state after the timing for a fixed time of 1s +/-0.5s

d. At the end of the 1 sec period the contacts return to the shelf state.

e. When the input power is removed contacts return to the shelf state.



Mode Star-Delta

a. Need continuous input power applied.

b. No start signal required. Timing is initiated when input power is applied.

c. Star ouput contact changes state when input power is applied.

d. After timing is complete star output contact returns to the shelf state then both the star & delta contacts remain in shelf states until transfer time setting is complete.

e. Delta output contact changes state after transfer time is complete.

f. Instantaneous contact changes state when input power is applied.

g. All contacts return to the shelf state when input power is removed.



Mode True Off-Delay (Trigger=Power Off)

a. Continuous input power is NOT required.

b. No start signal applied.

c. Contacts change state immediately when input power is applied.

d. Timing starts when input power is removed.

e. At the end of the time period contacts return to the shelf state.

f. Relay timing is reset when input power is reapplied while the relay is timing. Contacts remain in energized state.