TDC 1/4/05 4:10 PM Page 1 1/4/05 4:10 PM Page 2 GUIDE TO CONTROLS INSTALLATION Step Three Step Four Panel DIN Rail Mounting 4 3 PO W E R I N V E RT 1 7 D E L AY --+ 2 R E L AY 6 6 4 I N V E RT 7 D E L AY --+ 2 5 1 R E L AY 8 The controller may be mounted by either a back panel using two screws through mounting holes located at the corners of the controller or by snapping the controller on 35 mm DIN Rail. 5 2 6 INPUT1 35 mm DIN Rail LATCH INPUT2B I N P U T 2 A ONOFF 2.2" 9 9 9 1. Power indicator: This green LED lights when AC power is ON. .275" 2. Relay indicator: This red LED will light whenever the controller energizes the relay, in response to the proper condition at the switch input and after the time delay. 3. AC Power terminals: Connection of 120 VAC power to the controller. The setting may be changed to 240 VAC if desired. This requires changing internal jumpers; this is covered in the Installation section of the manual. Polarity (neutral and hot) does not matter. 4. Relay terminals (NC, C, NO): Connect the device you wish to control (pump, alarm etc.) to these terminals: supply to the COM terminal, and the device to the NO or NC terminal as required. The switched device should be a noninductive load of not more than 10 amps; for reactive loads the current must be derated or protection circuits used. When the red LED is ON and the relay is in the energized state, the NO terminal will be closed and the NC terminal will be open. 3.475" .225" Note: Always install the controller in a location where it does not come into contact with liquid. Connecting switches to input terminals: Please note a difference between Dwyer flow switches (N-channel and P-channel). Use only the N-Channel switches with the TDC series of controller. Wire the Red wire to the (+) terminal and the Black wire to the (-) terminal. Wire the White wire to the (S). See the illustration below to indicate wiring for your switch. Reversing Red and Black wire will change switch from NC to NO. Note: connect the Shield wire on the Flow switch to the GND terminal if required. INPUT L AT C H INPUT1 INPUT2A ONOFF INPUT2B (+) 24 VDC 50 mA Max. 7. Invert switch: This switch reverses the logic of the relay control in response to the switch: conditions that used to energize the relay will now de-energize the relay and vice versa. 8. Latch switch (TDC): This switch determines how the relay will be energized in response to the two sensor inputs. When LATCH is OFF, the relay responds to switch Input 2A only; when LATCH is ON, the relay will energize or de-energize only when both switches (2A and 2B) are in the same condition (Flow or No-Flow). The relay will remain latched until both switches change conditions. (-) (S) 14 VDC 25 mA Max. White GND FT10-XX02 FT10-XX02 GT10-XX02 GT10-XX02 NC Wiring NO Wiring LED Indication Use LED's located above the input terminals to indicate whether the switch is in a Flow or No-Flow state. With the flow switch wired NC, the Amber LED indicates No-Flow and no LED indicates flow. Wiring the switch NO (reversing the Red and Black wires), the Amber LED indicates Flow and no LED indicates No-Flow. NC Wiring Amber INPUT1 9. Input terminals: Connect the switch wires to these terminals: Note the polarity: (+) is a 24 VDC, 50 mA power supply (connected to the red wire of a Dwyer flow switch), and (-) is the common ground path from the switch (connected to the black wire). Also, the (S) is a 14 VDC, 25 mA supply (connected to the white wire). If polarity between the red and black wires is reversed, the switch will change from NC to NO. Black Red 6. Input indicators: Use these LEDs for indicating Flow or No-Flow status of switch. For NC wiring, an Amber LED indicates No-Flow and no LED indicates Flow. For NO wiring, an Amber LED indicates Flow and no LED indicates No-Flow. White 5. Time delay: Use potentiometer to set delay from 0.15 to 60 seconds. Delay occurs during switch make and switch break. Red Black TDC NC Wiring Off INPUT1 NO Wiring Amber NO Wiring OFF INPUT1 INPUT1 TDC 1/4/05 4:10 PM Page 3 INSTALLATION TROUBLESHOOTING Step Five Step Six VAC Power Input Wiring Controller Logic Note: Polarity does not matter with the AC input terminal For all controllers, please use the following guide to understand the operation of the Dwyer TDC1/TDC2 controllers. Ground Neutral Hot Ground Neutral Hot 1. Make sure the Green power LED is On when power is supplied to the controller. POWER POWER INVERT AC D E L AY -- + AC POWER GND INVERT 240 VAC, 50 - 60 Hz R E L AY 1 D E L AY -- + 120 VAC, 50 - 60 Hz R E L AY 1 Relay Input Wiring The controllers use dry contact Single Pole Double Throw (SPDT) relays rated at 250 Volts AC, 10 Amps, 1/2 Hp. The terminals are labeled Normally Open (NO), Common and Normally Closed (NC). Below shows four examples of basic wiring: RELAY OUTPUT NO NC C 250 VAC, 12 A, 1/2 Hp Alarm Contact @ No-Flow Pump Open @ No-Flow POWER POWER INVERT D E L AY -- + INVERT D E L AY INVERT -- + R E L AY 1 D E L AY -- + R E L AY 2 INVERT D E L AY -- + R E L AY 1 R E L AY 2 2. For NC switch wiring, the input LED's on the controllers will be Amber when the switch reads No-Flow and Off when the switch reads Flow. 3. The input LED will always respond to its corresponding relay LED. With invert Off, the relay LED will be On when the input LED is On and Off when the input LED is Off. With invert On, the relay LED will be Off when the input LED is On and On when the input LED is Off. 4. The relay may be wired either NO or NC. The normal state of the relay is when its LED is Off. With the LED On, the relay is in the energized mode and all terminal connections are reversed. 5. TDC model only, Latch ON operation: When both input LED's are ON, the relay will be energized (red LED On). After that, if one switch input turns Off, the relay will remain energized. Only when both switch LED's are Off will the controller de-energize the relay. The relay will not energize again until both switch LED's are ON. Reversing Invert switch will reverse logic. See the Logic Chart below for further explanation. Relay Latch Logic Chart Note: The invert is switched between the Alarm and Pump Wirings. Normally Open Relay Wiring Normally Closed Relay Wiring Invert Off — POWER INVERT D E L AY -- + INVERT POWER D E L AY INVERT -- + R E L AY 1 D E L AY -- + R E L AY 2 INVERT D E L AY -- + R E L AY 1 Changing from 120 to 240 VAC Remove the back panel of the controller and gently slide the printed circuit board from the housing. Use caution when removing the PCB. Located jumpers JWA, JWB and JWC on the PCB. To change to 240 VAC, remove jumpers from JWB and JWC and place a single jumper across JWA. To change to 120 VAC, remove jumper JWA and place jumpers across JWB and JWC. 240 VAC J WA JWB JWC JWC JWB J WA + On Off Invert ON — Latch Off + On Off Input A InputB Relay Input A InputB Relay ON No Effect ON ON No Effect Off OFF No Effect OFF OFF No Effect On Invert Off Latch ON Invert ON Latch ON R E L AY 2 Note: The invert is switched changes between Normally Open and Normally Closed. 120 VAC Latch Off — + On Off Input A InputB Relay — + On Off Input A InputB Relay ON ON ON ON ON Off OFF ON No Change OFF ON No Change ON OFF No Change ON OFF No Change OFF OFF OFF OFF OFF On TDC 1/4/05 4:10 PM Page 4 SPECIFICATIONS Step Two Supply voltage: Consumption: Sensor supply: Relay type: 120 / 240 VAC, 50 - 60 Hz. 5 Watt 13.5 VDC @ 100 mA TDC1: (1) SPDT TDC2: (1) SPDT, (1) Latched SPDT 250 VAC, 10A, 1/2 hp. Selectable, NO or NC 0 to 60 seconds Sensor, relay & power status Power fail-safe F: -40 to 158 C: -40 to 70 Panel or 35 mm DIN Rail (EN 50 022) Polypropylene (U.L. 94 VO) LR 79326-3 (CSA/NRTL) Relay load: Relay mode: Time delay: LED indication: Fail safety: Temperature range: Enclosure rating: Enclosure material: Certificate number: Dimensions 3.9" POWER INVERT D E L AY —+ INVERT D E L AY —+ R E L AY 2 R E L AY 1 1.8" 2.7" LATCH INPUT1 INPUT2A ONOFF INPUT2B Functional Diagram Relay NC ("Relay 1" in LC82) C NO Sensor Input 1 (+) (-) Latch / Invert Logic Time Delay + - S + - S Sensor Input A* Sensor Input B* S AC Power Supply AC 3.1" 3.6" GND Latch / Invert Logic Time Delay Approval Label TDC1 Faceplate PO W E R I N V E RT ® NC ("Relay 2" in LC82) NO Part Number Information: Mat'l PP PP Description Flow/No-Flow Controller Dual Flow/No-Flow Controller D E L AY --+ R E L AY Relay C Part # TDC1 TDC2 LR79326 -3 1 NRTL-C Power Supply 120/240 VAC, 50 - 60 Hz INPUT1 5 Watt Maximum Relay Rating 250 VAC, 10 A, 1/2 Hp Refer to the instruction manual for installation TDC2 Faceplate instructions. PO W E R I N V E RT D E L AY I N V E RT --+ R E L AY D E L AY --+ 1 R E L AY 2 LATCH INPUT1 I N P U T 2 A ONOFF INPUT2B Make a Fail-Safe System: Design a fail-safe system that accommodates the possibility of relay or power failure. If power is cut off to the controller, it will de-energize the relay. Make sure that the de-energized state of the relay is the safe state in your process. For example, if controller power is lost, a pump will turn off if it is connected to the Normally Open side of the relay. While the internal relay is reliable, over the course of time relay failure is possible in two modes: under a heavy load the contacts may be “welded” or stuck into the energized position, or corrosion may build up on a contact so that it will not complete the circuit when it should. In critical applications, redundant backup systems and alarms must be used in addition to the primary system. Such backup systems should use different sensor technologies where possible. While this manual offers some examples and suggestions to help explain the operation of Dwyer products, such examples are for information only and are not intended as a complete guide to installing any specific system.