CONTROL UNIT MODELS AND MODULAR CONFIGURATIONS

TM 10-6665-297-13&P 1-3.1.10 Relay External Circuits (continued) normally closed contacts (i.e. double-pole, double-throw) wired to terminals to which external devices may be connected. Fail relay K3 of CD800/830 models and K1 (Fail), K3 and K4 (Alarm) relays of CD802/832 models provide one normally open and one normally closed contact to which a remote indicating lamp, buzzer, or other device may be connected. Relay switching contacts tolerate currents of up to 3 amperes (noninductive). For inductive loads, derate contacts to 1.5 amperes maximum. Devices requiring currents that exceed 3 amperes noninductive load or 1.5 amperes inductive load must be controlled by heavier external relays, which may be switched by the relays contained in the control module. 1-3.2 CONTROL UNIT MODELS AND MODULAR CONFIGURATIONS . CD800/830 and CD802/832 control units and modules are available in the following model configurations. CD800 and CD830 models contain circuit boards designed to monitor single points. CD802 and CD832 models contain printed circuit boards indicators, adjusters, and controls to monitor two discrete points per module. 1-3.2.1 Series 800 or 802 single-unit configurations (Figure 1-15): CD800P, CD80OPF, CD802P, CD802PF: Vertical front panel; chassis enclosure. PF: with flexible cable; P: without flexible cable (extend- er card required to maintain connections to circuit- board-front-panel assembly when extended for adjustments and tests) CD800W, CD802W: Horizontal front panel; fiberglass-reinforced polyester, wall-mounting cabinet; conduit hubs at either top or bottom CD800X, CD802X: Circular front panel; explosion-proof cast aluminum housing for installation in hazardous areas 1-3.2.2. Series 800 or 802 multi-module configurations (Figure i-16): CD800/802 P or PF control units may be mounted together in any number at a central monitoring point. Five such units may be mounted side-by-side in a standard 19- inch instrument panel, or in cutouts in any panel or enclosure in the number desired. CD800 and 802 series control units provide an independent, integral power transformer for each unit, whereas CD830 and 832 series control modules operate from a rack-adapter- mounted power transformer common to up to six modules per rack. 23-9617 7/1/76 1-23