1. SFISA-7561 ISA bus card is isolated timer counter interface card, can be easily applied to the computer with ISA bus slots. PC operating system can use the popular Windows family, Unix and other operating systems and professional data acquisition and analysis software, LabVIEW, LabWindows / CVI environments. 
 SFISA-7561 Isolated multi-count timer interface card is equipped with 8 inputs and 8 timer counter timer counter output isolation interface with 8 digital inputs and 8 digital output isolation interface. One digital output with latch function. 
 Counting the frequency range 0-1MHz. Can be programmed with eight counts of interrupt channel management, the internal clock frequency. The use of efficient anti-jamming circuit, suitable for applications where a strong interference. 
 SFISA-7561 card is easy to install, simple programming. Simply use the interface card into any PC ISA bus slot. The input and output signals are on the card with the 37-pin D-type socket to connect external signal sources and equipment. 
 2 Specifications 
 2.1 Counter / Timer 
 Isolated programmable timer counter into the number of channels: 8 
 Isolated programmable timer counter of the number of channels: 8 
 Time count precision: 16; 
 8 interrupt management; 
 Input frequency range 0-1MHz; 
 Internal clock frequency range 2M-40Hz; 
 Input and output signal level: TTL level 
 Output frequency range 50kHz-0.001Hz; 
 Output settling time: 5 ms 
 0 - 100% duty cycle 
 External power: +5 / +12 / +24 V (see Section 4 below) 
 Isolation> 1000V 
 2.2 Digital Input 
 Digital input channels: 8 isolated 
 Input frequency: 10kHz (5V) / 8kHz (12V) / 4kHz (24V); 
 Characteristics of the input signal level (+5 V external power supply) 
 Input High: VIH> = 4V 
 Input Low: VIL = 4V 
 Output Low: VIL <= 0.7V 
 Output load resistance:> = 2 ohm (plus +5 V power) 
 External power: +5 / +12 / +24 (see Section 4 below) 
 Isolation voltage 1000V 
 2.4 Power Consumption 
 +5 V ≤ 600mA 
 +12 V ≤ 100mA 
 -12V ≤ 70mA 
 External +5 V ≤ 600mA 
 External +12 V ≤ 100mA 
 External +24 V ≤ 70mA 
 2.5 use of environmental requirements 
 Operating temperature: 10 ℃ ~ 40 ℃ 
 Relative Humidity: 40% to 80% 
 Storage Temperature: -55 ℃ ~ +85 ℃ 
 2.6 Dimensions: (without bezel): length × height = 180mm × 118mm