OPERATION 3.4 ELECTRONIC MONITORING AND CONTROL SYSTEM ECS Level 3: Service / MESSAGES ON / OFF - 3 - Messages OPERATE KEY SWITCH - 3 - Messages 0 1 Condition : Level 3: Service / EVALUATION ON / OFF - 3 - Evaluation OPERATE KEY SWITCH - 3 - Evaluation 0 1 Condition : Level 2: Inputs - Outputs - 2 - Inputs - Outputs * ANALOG-INPUTS * - 2 - Inputs - Outputs * DIGITAL-INPUTS * - 2 - Inputs - Outputs * DIGITAL-OUTPUTS * 147