Bacharach GDA-1600 Manuale Proprietario
Instruction 5700-9001
GDA-1600 16-Channel Controller
13
3.2.2 Alarm 1 / Alarm 2 / Horn Relay Setup Menu
Alarms 1 and 2 are identical except A1 may not be acknowledged and front panel LED
indicators are yellow while A2s are red. Since their configuration menus are the same
only one is shown in Figure 3.2 for clarity.
Figure 3.2 – Alarm / Horn Relay Setup Menu
Entries
Description
Setpoint
Value where the alarm trips. It is entered in engineering units. For example, if a
channel monitors 0-50 ppm H
2
S and the alarm is to trip at 10 ppm, the correct entry is
10.00.
Latching
Determines either manual or automatic alarm reset operation. YES requires a manual
Alarm Reset to unlatch the alarm even though an alarm condition no longer exists. YES
also causes this alarm group’s common relay, front panel LED, and optional discrete
relay to latch. NO allows all outputs for this alarm to automatically reset as soon as the
alarm condition clears.
Trip On
TRIP ON is set to HIGH for increasing alarms or LOW for decreasing alarms to determine
if the alarm activates upon exceeding or falling below the setpoint.
On/Off
Delay
Allow ON and OFF time delays affecting how long the setpoint must be surpassed
before an alarm event transition occurs. ON delays are limited to 10 seconds while OFF
delays may be as long as 120 minutes. Delays are useful in many applications to
prevent nuisance alarms and unwanted cycling into and out of alarm conditions.
Horn On
Used to link this alarm to the common horn relay. NO causes the alarm to have no
effect upon the horn relay. Entering YES causes this alarm to turn the horn relay on
steady, or, to pulse it depending upon horn configuration in they system menu (see
section 3.3.1).
Discrete LED indicators on the front panel indicate the status of each alarm and relay.
Any new alarm event causes the associated LED to flash until Alarm Reset occurs
causing an acknowledged, steady on condition. Operators should recognize new alarms
by a flashing LED. Alarm Reset also acknowledges, or deactivates, the horn relay until
another new alarm occurs.
All relays are rated at 5 Amp for 28 VDC and 250 VAC RESISTIVE loads.
All relays are rated at 5 Amp for 28 VDC and 250 VAC RESISTIVE loads.
IMPORTANT: Appropriate diode (DC loads) or MOV (AC loads)
snubber devices must be installed with inductive loads to prevent RFI noise
spikes. Relay wiring should be kept separate from low level signal wiring.