Connect Tech BLUE HEAT/NET SYNC CTIM-00044 - Manual (Page 65)

Connect Tech Blue Heat/Net Sync User Manual
Revision 0.01 65 65
DB-9 Female Pinouts
DB9F
Pin Signal Name [1] Functional Notes
1 RTC_Clear Clears and holds the seconds count of the Real Time Clock at
00. [3], [6]
2 RTC_Seconds Provides the external time base for the Real Time Clock.
Internal time base is 1Hz [3], [5]
3 GND Signal reference for all signals
4 EXT_REF_CLK 0-20MHz clock input [2]
5 GND Signal reference for all signals
6 TX_TRIGGER_P1 Transmission trigger for port 1 [3], [4], [5]
7 TX_TRIGGER_P2 Transmission trigger for port 2 [3], [4], [5]
8 TX_TRIGGER_P3 Transmission trigger for port 3 [3], [4], [5]
9 TX_TRIGGER_P4 Transmission trigger for port 4 [3], [4], [5]
[1]
All signals are inputs.
[2] Electrical properties for External Reference clock input:
+/- (1-10)Vpp AC sine wave
+/- (3.3-10Vpp square wave.
10-20MHz Frequency range.
Capacitive coupled input.
Must be referenced to GND pin.
TTL compatible. For example 0-3.3V or 0-5V will work.
[3]
Electrical properties:
+/- (3.3- 10)Vpp pulse.
Minimum pulse width is 100ns seconds.
Capacitive coupled input.
Must be referenced to GND pin.
TTL compatible. For example 0-3.3V or 0-5V will work.
[4] Used for Asynchronous transmissions. When the mode is enabled, the Blue Heat/Net Sync will
transmit exactly one byte of data when the TX_TRIGGER input changes state. These same
signals are available on the individual DB25 port connectors.
[5]
The input is edge sensitive and can be configured for negative or positive edge sensitivity.
[6] The input is level sensitive and can be configured for 1 or 0 level sensitivity .
Table 10: DB-9 Female Pinouts