Meinberg DCF77 UA509 - Manual (Page 17)

17
Rear Connector Pin Descriptions
Signal Name Pin Description
GND 32a+c power supply ground
VCC in (+5V) 1a+c supply voltage
P_SEC out 6c pulse per second, TTL level, active high
pulse width: 200 msec
P_MIN out 8c pulse per minute, TTL level, active high
pulse width: 200 msec
/P_SEC out 6a like P_SEC, but active low
/P_MIN out 8a like P_MIN, but active low
DCF_MARK 4c time marks from DCF77, used as output line with
standard version of the clock, used as input line with
boards without LF receiver
SET button 2c SET button for setting the clock manually
SET_MODE button 12c SETMODE button for setting the clock manually
Boot 4a Boot signal for starting bootstrap loader
SDA, SCL 3a, 3c I²C bus interface (option)
curr_loop -15V in 13a auxiliary supply voltage input used with current
loop interface
curr_loop +5V out 15c auxiliary supply voltage output used with current
loop interface
COM0:
-pass_in/+act_in 14a passive 20mA current loop input (-) or
active 20mA current loop input (+)
+pass_in 14c passive 20mA current loop input (+)
-act_in 15a active 20mA current loop input (-)
-act_out_1 17a active 20mA current loop output (-)
+act_out_1 17c active 20mA current loop output (+)
-act_out_2 19a active 20mA current loop output (-)
+act_out_2 19c active 20mA current loop output (+)
-pass_out_1 21a passive 20mA current loop output (-)
+pass_out_1 21c passive 20mA current loop output (+)
-pass_out_2 23a passive 20mA current loop output (-)
+pass_out_2 23c passive 20mA current loop output (+)