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Manafacture: Sierra Monitor Corporation File size: 67.51 kb File name: single_channel_controller.pdf Language of manual:

Both controllers provide the user with two independent adjustable alarm levels. In addition, the output can be continuously sent to a chart recorder. The alarm relays can be programmed to be either latching or non-latching and to activate either as a rising or falling alarm. When the controller is used with 4-20 mA sensors, a third alarm provides a fault indication when the controller detects loop current less than 3 mA. The alarms are acknowledged via either an external reset switch or a reset push-button on the Model 4011 Each alarm relay is fused to prevent damage from alarm and control circuits. The relays are SPDT Form C type rated at 5 Amps to provide direct alarm action, reducing the need for interposing relays. Model 4001 The Model 4001 is housed in a NEMA 4X wall mount enclosure or the optional NEMA 7 explosion proof enclosure. AC or DC powered versions are available. Both versions include as standard an integral battery charger that can provide a trickle charge to an optional battery to provide reliable continuous service. Single Channel Controllers Model 4001 Model 4011 Model 4001 Model 4011 The 3 1/2 digit LCD display can read the concentration or alarm setpoints. LEDs on the front panel provide indication of all three alarms or low battery power. Model 4011 The Model 4011 is in a 1/8 DIN panel mount enclosure. This controller is DC powered. Optional power supply/ battery chargers can power to a single unit or up to 4 controllers. The front panel includes a 3 1/2 digit LCD display, LEDs indicating the three alarms, reset push-button, four display selection LEDs and a Select Pushbutton. The RESET button is used to reset the relays when the user has selected Latching or Acknowledge mode. The SELECT button steps the display through each of the four possible selections that will be indicated by the appropriate illuminated LED. Features Benefits Two adjustable alarm setpoints with latching or Flexibility to fit your application needs non-latching relays 4-20 mA or standard voltage/current input Interfaces with industry standard sensor transmitters Battery backup option Insure continuous operation Chart recorder output signal Continuous logging of concentration data Sierra Monitor Corporation 1991 Tarob Ct. Milpitas, CA 95035 (408) 262-6611 800-727-4377 FAX: (408) 262-9042 Single Channel Controllers SPECIFICATIONS INPUT SIGNAL: Standard: 4-20mA Factory Options: 0-5V, 0-10 V, 0-20mA INPUT The input loop resistance for the 4-20mA RESISTANCE: loop is 100 ohms INPUT POWER: Model 4001 18-24 VDC, Nominal 350 mA, Max. 500 mA. Battery charger feature accepts 120V AC Model 4011 14-30 VDC, Nominal 100 mA @24VDC without sensor module, 180 mA @20VDC with sensor module at 20 mA loop current ALARM LEVELS: Two alarms, user adjustable, alarm levels HiHi, HiLo, or LoLo ALARM Jumper selectable for Latching/Non- CONFIGURATION: Latching. Jumper selectable for Alarming on GREATER or LESS than Alarm Level. TROUBLE RELAY: Relay de-energizes when loop current is l...

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