15
EXTERNAL START/STOP/RESET INPUTS FOR UP/DOWN TIMER/STOPWATCH and EVENT COUNTER
SELENA timers and event counter may be set up to use external inputs for Start, Stop (count UP, count Down) and Reset.
These inputs are available via the screw terminal accessible at the back panel.
To activate External Inputs for Up/Down Timer/Stopwatch or Event Counter, enable function Fn36.
CAUTION:
External inputs may be connected to DRY CONTACTS ONLY. Any voltage carrying signals connected to those
inputs may cause irreversible damage. However, in special applications it is possible to apply a voltage within the range from 0
to +5V between the Common (0V) and any of the external control inputs.
Timer activated via the external inputs behave in similar fashion as when it is operated using the Remote Control unit.
However, note the following:
1.
Timer or Counter initial count may be preset only via the remote control (by pressing the SET key).
2.
A) If Function Fn58 is NOT ENABLED, activating the START input will start the timer only if it was previously
RESET either by activating the external RESET input, or via the remote control, by pressing the SET key.
In the Event Counter mode (Fn31), the count will be incremented by 1.
B) If Function Fn58 is ENABLED, activating the START input will start or restart the timer only if the STOP (HALT)
input is NOT activated.
In the Event Counter mode (Fn31), activating UP input will increment the count by 1.
3.
A) If Function Fn58 is NOT ENABLED, activating the STOP input will stop the timer and it may only be restarted
from beginning after activating the RESET input or pressing the SET key on the remote.
B) If Function Fn58 is ENABLED, activating the STOP (HALT) input will “halt” the timer for as long as this input
remains active.
In the Event Counter mode (Fn31), activating DN input will decrement the count by 1.
NOTE: If internal buzzer is enabled (Fn17) it will be activated whenever the count reaches 0000 while counting
down. The MUTE key or the SET key on the remote, or external RESET input may be used to silence the buzzer.
4.
If function
Fn 7
is not set as exclusive display screen mode, pressing STRT, STOP or SET key on the remote will
bring the Timer display on screen. Similarly, activating the external RESET input will have the same effect.
5.
When External Inputs are enabled (by enabling function
Fn36
), only the SET key on the remote may activate the
timer or counter preset. The STRT and STOP keys on the remote are not operational in that mode.
Power line
Terminal
(if installed)
.POWER
Common
RESET
STOP/DN
START/UP
WIRING OF EXTERNAL DRY CONTACT SWITCHES FOR TIMER/COUNTER OPERATION
BLACK
Colors of wires if Cables
supplied with the clock
RED
WHITE
GREEN
