LOCK-RETAINER 1977055 - Caterpillar

Illustration 1 g00321237
Alarm Module (1) Amber indicators. (2) Red indicators. (3) Lamp test switch. (4) Alarm silence switch. (5) Horn.The alarm module (ALM) is an attachment. The ALM is located on the instrument panel. Red indicators (2) and amber indicators (1) are the visual indicators. The horn (5) is the audible indicator. The ALM is designed to be powered by only a 24 DCV battery system or a 32 DCV battery system. There are six versions of the basic module. The modules are either alarm modules or a remote annunciator. The term "remote annunciator" is used but the annunciator is the same basic alarm module. The versions are listed below.
NFPA 99 Standby alarm module.
A NFPA 99 remote annunciator which is used with a standby NFPA 99 alarm module.
NFPA 110 Standby alarm module which is used with NFPA 110 remote annunciator panel. See Systems Operation, "Alarm Module Control (NFPA 110)".
Prime power single engine alarm module .
Prime power multiple engine alarm module.
EMCP II remote annunciator.The only difference between these modules is in the graphics film on the front of the panel and the jumper wires on the rear of the panel. See the Testing And Adjusting, "DC Schematic". The NFPA 99 remote annunciator and the remote annunciator for the EMCP II have a lamp test switch. The alarm module (ALM) gives a warning of conditions that are becoming a problem. The warning occurs before conditions are severe enough to shut down the engine.If an alarm fault develops with the ECS in the COOLDOWN/STOP or AUTO positions, then the fault is indicated by the optional alarm module and/or the remote annunciator. Description of Change
Note: In the following description, the word "annunciator" may mean alarm module or remote annunciator module. The annunciator module receives data from switch inputs, internal circuitry, and a serial data link from the GSC. Switch Inputs
Four inputs are available as connections for the switch inputs. Switch inputs are activated when the inputs are connected to the battery negative terminal ("B-"). See Table 1.Internal Circuitry
Internal circuitry is used in order to determine if the DC battery supply voltage is too low. The setpoint is set at the factory at 24 DCV. Data Link
The annunciator module receives data from the generator set control (GSC) by a serial data link. The items that are included in this data stream of information are listed below.
Coolant temperature has exceeded the high temperature alarm setpoint