User Manual

7521/2/2A/3/4/7 Series Hardware User’s Manual, Ver. 1.5 Sep/2002, 7Mh-001-15 -----24
COM2
 RS-485: D2+, D2-, self-tuner ASIC inside
 Communication speed: 115200 max.
 Isolation voltage: 3000V
COM3 for 7522/7522D/7523/7523D only
 RS-232 only
 RS-232: TXD,RXD,RTS,CTS,GND
 Communication speed: 115200 max.
 16 bytes FIFO
COM4 for 7523/7523D only
 RS-232 only
 RS-232: TXD,RXD,GND
 Communication speed: 115200 max.
 16 bytes FIFO
D/I
 3 channels for 7521/7521D/7522/7522D
 2 channels for 7523/7523D
 Logic low level: 0V ~ 1V
 Logic high level: 3.5V ~ 30V
D/O
 3 channels, 100mA, 30V max. For 7521/7521D only
 1 channels, 100mA, 30V max. For 7522/7522D only
Display
 7-segmemt LED: 5-digit (for 7521D/7522D/7523D only)
Power
 Power requirements: 10 to 30VDC(non-regulated)
 Power consumption: 2.0W for 7521/7522/7523
3.0W for 7521D/7522D/7523D