GEAR-PLANETARY 1109286 - Caterpillar

Illustration 1 g00321237
(1) Amber indicators (2) Red indicators (3) Lamp test switch (4) Alarm silence switch (5) HornThe Alarm Module (ALM) is an attachment which is located on the instrument panel. Red indicators (2) and amber indicators (1) are the visual indicators. The Horn (5) is the audible indicator. A 24 VDC battery system or a 32 VDC battery system powers the ALM. There are six versions of the basic module. The modules are either alarm modules or a remote annunciator. The versions are listed below.
Standby NFPA 99 alarm module
The NFPA 99 remote annunciator is used with the standby NFPA alarm module.
The NFPA 110 standby alarm module is used with a NFPA 110 remote annunciator panel.
Prime power single engine alarm module
Prime power multiple engine alarm moduleThe only difference between these modules is in the graphics film on the front of the panel and the jumper wires on the rear. The NFPA 99 remote annunciator has a lamp test switch. The following description of operation refers to the alarm/remote annunciator module as the annunciator module. The ALM gives a warning of conditions that are becoming a problem. The warning occurs before conditions are severe enough to shut down the engine.An alarm fault develops while the generator set is running and when the Engine Control Switch (ECS) is in the COOLDOWN/STOP position or in the AUTO position. An alarm fault develops when the generator set is not running and when the ECS is in the COOLDOWN/STOP position or in the AUTO position. That fault is indicated by the optional alarm module or the remote annunciator. Description Of Operation
Note: In the following paragraphs, the annunciator can refer to the alarm module, or the annunciator can refer to the remote annunciator module. The annunciator receives data from the following items: switch inputs, internal circuitry and a serial data link from the Status Control Module (SCM).Switch Inputs
Four switch inputs are available for the switch connections. See Table 1.Internal Circuitry
Internal circuitry determines if the supply for VDC is too low. The setpoint is set at the factory at 24 VDC. Data Link
The annunciator module receives data from the SCM by a serial data link. The received data includes the following list.
Coolant temperature has exceeded the high temperature alarm setpoint that is programmed into the SCM.
Oil pressure is below the low oil pressure alarm setpoint that is programmed into the SCM.
Coolant temperature is below the low temperature alarm setpoint that is programmed into the SCM.
The ECS is not in the AUTO or MANUAL/START position.
Oil pressure is below the setpoint for a shutdown from low oil pressure that is programmed into the SCM.
Coolant temperature has exceeded the setpoint for a shutdown from high water temperature that is programmed into the SCM.
The engine has failed to start.
The engine speed exceeds the engine overspeed setpoint that is programmed into the SCM.
The