Turn screw adjustment of RECORDER potentiometer R17 to set recorder response at desired 100%
point of recorder graph.
INSTALLATION OF REMOTE RESET SWITCH. To install remote reset switch, follow Modification
for Common Point Resetting, paragraph 2-7.1.
INSTALLATION OF REMOTE ALARM AND PROCESS CONTROL DEVICES. Buzzers, lights,
horns, process control mechanisms and other external devices rated up to 3 amperes maximum at
30 VDC/120 VAC for resistive loads (derated to 50 percent for inductive loads) may be connected
directly to WARN, ALARM, or FAIL terminals on the control module terminal panel. Devices
requiring heavier load current must be isolated from control module circuitry by means of external
relays to prevent destruction of printed circuit traces.
Tables 2-3 and 2-4 identify the various combinations of relay switching terminals available for
operating remote devices.
"HORN SILENCE" OR "ACKNOWLEDGE" OPTION. In some cases where signal horns or sirens
are connected to a system, it may be undesirable to have such signals continue to sound once they
have alerted personnel to the presence of a hazardous situation. In such cases, an accessory is
available from the factoryto permit the signal device to be acknowledged and the sound silenced
while corrective action is implemented, even though the condition persists and the "Warn" and
"Alarm" relays remain actuated. At the same time, it is desirable to have the signal device remain
armed to report a change in status, such as another "Warn" or "Alarm" condition at a new location,
which may indicate a worsening condition. This option may be readily provided at the factory when
ordered in multi-point installations, and is available in kit form for addition to existing systems. (For
add-on installation, it is recommended that specific requirements be discussed with a Bacharach
This arrangement consists of a number of "Trigger Modules" appropriate to the number of detection
channels with which it is to work (each trigger module accepting six channels of "Alarm" or "Warn"
output), a common output auxiliary relay, a common "Silence" or "Acknowledge" pushbutton switch,
and a horn or other signal device. When the horn sounds in response to a "Warn" or "Alarm" signal,
it may be manually silenced by pressing the "Acknowledge" pushbutton; however, a new "Warn" or
"Alarm" condition at another location will cause the horn to sound again, and to continue to sound
until acknowledged again. This process may be repeated until all locations have reported an alarm
and been acknowledged, at which point the circuit is saturated, having done all it can. However, this
circuit will be automatically re-armed whenever a condition causing an alarm has cleared and output
circuits reset (either automatically or manually). This circuit is shown in Figure 2-29.
Part numbers are: Trigger module, #0051-7106; Power module, #0051-7101; Relay assembly,