Instruction manual

Bulletin 700-HNC
Plug-in Timing Relays
9-93
www.ab.com/catalogs Preferred availability cat. nos. are b
bold
.
Publication A117-CA001A-EN-P
Timing Charts
0
1
2
3
4
5
6
7
8
9
10
11
12
13
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.
Power
T
Start
Output
Basic Operation
T
T
t
T
Power
Start
Power LED
Output (N.O.)
t<T
Output (N.C.)
T
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.
Basic Operation
T
Power
Start
Output
t<T
T
t
T
Power
Start
Output (N.C.)
Output (N.O.)
Power LED
T
Basic Operation
Power
Output
Power
T
t<T
Timed Output (N.C.)
Timed Output (N.O.)
Power LED
Basic Operation
Power
Start
Output
T
Power
Start
Power LED
Output (N.C.)
Output (N.O.)
T
t
t<T