ELBOW 4N9617 - Caterpillar

Illustration 1 g00709859
Display Area of the Programmable Relay Control Module (1) Red LED Display of the Programmable Alarm (2) Red LED Display of the Internal Fault Alarm (3) Yellow LED Display of the Fault Alarm (4) Keypad (5) Lower LCD Display (6) "CID", "DIAG", "FMI", "PROG", and "COUNT" (7) Upper LCD Display LED Indicators for Faults and Alarms
There are eight LED indicators. Indicators (1), indicator (2), and indicator (3) are used in order to diagnose an alarm or a fault. The LCD display also aids the operator in correctly diagnosing an alarm or a fault. The indicators are divided into three groups. programmable alarm indicators (1), the internal fault indicator (2), and the fault alarm indicator (3) are the three groups. The programmable alarm indicators (1) will turn ON when selected conditions are active. The internal fault indicator (2) will turn ON when an internal PRCM fault exists. The fault alarm indicator (3) will turn ON when a fault that is external to the PRCM exists. These faults consist of components that are within the PRCM system and the faults are NOT customer programmable. PRCM Display
The lower display and upper display (5) and (7) of the PRCM are used for monitoring. The display monitors faults, programming, and setpoint information. The display area is LCD (liquid crystal display). PRCM Keypad
The keypad is used for controlling the information on the PRCM display. The buttons have specific functions that are explained under the appropriate topic. Refer to System Operation, "Input/Output Monitoring and Programming", System Operation, "Fault Viewing and Clearing", and System Operation, "Setpoint Viewing and Programming" sections in this manual.
Illustration 2 g00709863
Enlarged View of the PRCM Keypad (1) "LEFT" and "RIGHT" button (2) "UP" button (3) "DOWN" button (4) "SELECT" button (5) "ENTER" button (6) "TEST" button (7) "MODE" buttonPRCM Internal Relays
The relays are located inside the relay module on the rear of the PRCM. The relays are permanently attached within the relay module and the relays are NOT removable. The entire relay module must be replaced if a relay is faulty. Additional relays are available when one or more optional Relay Driver Modules (RDM) are used. Refer to the System Operation, "Relay Driver Module" section in this manual. The relay contacts are internally connected to the terminals of the relay module of the PRCM. The terminals are available for the customer to use. The voltage and current specifications for each terminal (relay) are shown in the illustration and listed in the chart.
Table 1
Load Specifications For the Internal Relays of the PRCM    
Relay Module and Number     Ratings For Resistive Loads     Ratings For Inductive Loads    
"K1"     7 milliamperes to 1 Amperes (24 DCV)     None (1) (2) (3)    
"K2", "K3", "K4", "K5" (terminal 24), "K6" and "K7"     0.5 to 10 amperes (24 DCV)     0.5 to 10 Amperes (24 DCV) (3)    
"K5" (terminals 23 and 36)     0.5 to 10 Amperes (24 DCV) and 0.5 to 10 Amperes (24