...........continued
Port
Description
Function
ST Optical Fibre
Port 13
• Disabled by default
Port 14
HV MOSFET
Port 15
• Disabled by default
Alarm Relay Terminal Block
Port 16
• Alarm relays disabled by default
Port 17
GNSS Antenna Socket
TNC antenna connector
• GPS, GLONASS, Beidou,
Galileo enabled
• Cable delay 150 ns
12.6
Input and Output Electrical Specifications
This section describes the electrical specifications of the GridTime 3000's ports.
Table 12-3. Input and Output Specifications
Circuit
Connector
Voltage
Current Rating
Isolation
T1 (at 75Ω)
RJ-48
2.4 V
110mA
1.5kV
E1 (at 75Ω)
RJ-48
2.37 V
110mA
1.5kV
J1 (at 75Ω)
RJ-48
2.4 V
110mA
1.5kV
1.544 MHz square
wave (at 75Ω)
BNC
1.3 V
17mA
2.5kV
1.544 MHz sinusoidal
wave (at 75Ω)
BNC
1.3 V
17mA
2.5kV
2.048 MHz square
wave (at 75Ω)
BNC
1.3 V
17mA
2.5kV
2.048 MHz sinusoidal
wave (at 75Ω)
BNC
1.3 V
17mA
2.5kV
10 MHz square wave
(at 50Ω)
BNC
1 V
20mA
2.5kV
10 MHz sinusoidal
wave (at 50Ω)
BNC
800 mV
16mA
2.5kV
AM IRIG-B
(Modulated)
BNC
8 V
80mA
2.5kV
DCLS IRIG-B/Pulse
output
BNC
5.5 V
150mA
2.5kV
DCLS IRIG-B input
BNC
5 V
5mA
2.5kV
RS232 String
RJ-12
±3 V - ±15 V
10mA
2.5kV
RS422 String
RJ-12
±5 V
35mA
2.5kV
HV Switching
Green screw terminal
—2pin
250 Vdc max
1A
3kV
Appendix A: Specifications
©
2022 Microchip Technology Inc.
and its subsidiaries
Manual
DS00004572A-page 238
