LOGIC CONTROL INPUT Thyristor Connections The logic control inputs are optically isolated and are ideally utilised for remote control in electrically noisy environments. The logic inputs A, B, UP and DOWN are activated by a 5 to 24 V dc signal with the respect to terminal C which is 0 volts. Terminal C and OV are not connected together when SW1 is in the OFF position. The logic input can also be activated by the 5V dc output from the FC36M via relay switching. Terminal C and OV should also be connected together. For the following logic control options the 6 way DIL switch (SW2) should have position No.1 switched to the OFF position. For additional control options see table A. Logic control Maximum power output levels are set by, the input voltage at the terminal marked 0-5V. With, for example, 4 volts on this input, the output will be limited to a maximum of 80%. Link the 0-5V input to 5V output terminal for 0-100% control range. Phase Angle control Option 1 the switch marked SW1 can be switched to the ON position, which utilises the internal 5 volts supply. This ON position simply connects terminals A with 5V and C with 0V. Option 2 the switch marked SW1 can be switched to the LOGIC or OFF position. The position isolates the inputs and disconnects terminals A from 5V and C from 0V. Inputs (A and C) then require external supply between 5 and 24volts dc. To Increase output power The terminal marked UP requires a 5 to 24 volts dc supply. Terminal C is 0 volts. The output power will increase at a rate determined by the ramp setting on VR3 (0-30 seconds). The output will reach its maximum when the ramp time has elapsed. If the UP signal is terminated during the ramp time the output will remain at that level, for example, if ramp time is 10 seconds. UP signal is on for 5 seconds, power output will ramp up to 50%. To decrease output power The terminal marked DOWN and C require a 5 to 24 volt dc supply. Terminal C is 0 volts. The output power will decrease at a rate determined by the ramp setting of VR3. The output will decrease to zero should the DOWN signal be maintained. If the DOWN signal is interrupted before the ramp down time has elapsed the output will stay at that level. Proportional control can be achieved with an on/off signal. This arrangement is particularly useful for temperature controllers, relay switching and PC based process controllers. Burst Fire control The switch marked SW1 should be switched to the OFF position and the terminal marked B should be linked to 5V and C (common) linked to the 0v terminal. Link terminals marked 5V and 0-5V. For remote Burst Firing control a 5 to 24V dc signal should be connected between B and C. C is 0 volts but is not internally connected to the 0V indicated on the pcb. Inductive or Resistive loads With switch No.3 on DIL switch No.2 in the OFF position the firing circuit configured to control resistive and some slightly inductive loads. When the switch is in the ON position the firing circuit should be used on inductive (transformer and coil) type loads. Current Limit The current limit input is designed to operate from 0-100mV dc input connected between terminals marked LIMIT input and 0V. This 100mV signal is amplified by IC7 and gives approximately 4 volts dc at pin 1. This voltage is fed into the microprocessor IC5 and compared with the voltage set by VR2 (I SET) which can be measured on pin 5 (IC5). When the voltage on pin 1 (IC7) is greater than the voltage on pin 5 (IC5), the controller will start to ramp down until the current reaches the I SET level. Current Trip The current trip input is designed to operate from 0-100mV dc input connected between terminals marked 5 8LIMIT input and 0V. This 100mV signal is amplified by IC7 and gives approximately 4 volts dc at TECHNICAL SPECIFICATION pin 1. This voltage is fed into the microprocessor IC5 and compared with the voltage set by VR1 (I TRIP) which can be measured on pin 7 (IC5). When the voltage on pin 1 (IC7) is greater than the voltage on pin 7 (IC5) the controller will shut down immediately and will stay latched in this state Supply until the microprocessor is powered down or reset. The voltage on pin 7 (IC5) is normally set to 4.8 Primary supply voltage using volts to allow for a 120% maximum current level. Integral transformer 380/415 V ac 50/60 Hz Secondary voltage 20 V ac 50/60 Hz Isolation voltage 4000V rms CURRENT CONSUMPTION Table A Full condition 300 mA Switch No.2 Function Selected Brown Up On GATE PULSES Analogue input, 0-5Vdc and 4-20 mA and SW1 in On position Initial short circuit gate current 1A Down Off Logic inputs A=Phase Angle, B=Burst Fire, U=Up, D=Down Sustaining short circuit gate current 0.5A Position 1 Initial pulse voltage (open circuit) 15V Red Up On Limit input 0-100 mV, Current Limit Set by VR2 Sustaining pulse voltage (open circuit) 8V Down Off Limit input off Initial gate pulse rate of rise (A/uS) 1 Position 2 Pulse width 50/60 Hz 22uS Orange Up On Inductive load timing Pulse train frequency 25 Khz Down Off Resistive load timing Position 3 OPERATION MODES Yellow Selection by input enable or auto Burst Fire and Phase Angle Up On Reverse phasing Blue O/P1 Yellow O/P2 Red O/P3 CONTROL SIGNAL ANALOGUE Down Off Normal phasing Red O/P1 Yellow O/P2 Blue O/P3 Position 4 Voltage signal into 10K ohms 0 5 V dc Green Up On Soft stop and start when DOWN input is enabled or disabled Current signal into 240 ohms 4 20 mA Down Off Hard start and stop when inputs A or B are enabled or disabled Position 5 CONTROL SIGNAL LOGIC Opto-isolated inputs 5 25 V dc Blue Up On Timing for 12 pulse operation using additional FC36M SOFT START Down Off Standard timing position Position 6 Adjustable range from power up 0 30 seconds CURRENT LIMIT Controlled limit or over-current trip 0 100mV dc LOAD OPTIONS Power connections Selection by switch (SW2) Resistive or Inductive TEMPERATURE LIMITS Operating range (C) 0 - 65C Storage (C) -20 to 85C MECHANICAL DIMENSIONS Length (mm) x Width (mm) x Height (mm) 160 x 100 x 36 Fixing Centres (mm) 150 x 62 FUSING It is recommended to use semiconductor (fast acting) type fuses or circuit breakers (Semiconductors MCB) for unit protection. On initial switch on some loads may need an increased Factor of Safety (F of S) for unit and/or device protection. (See SRA Datasheet for further information) 7 6