Irig Port; Real-Time Clock Specifications - Basler BE1-11g Instruction Manual

9424200994 Rev N

IRIG Port

IRIG time code signal connections are located on the rear panel. When a valid time code signal is
detected at the port, it is used to synchronize the clock function. Note that the IRIG time code signal
received from older IRIG receivers does not contain year information. If this is the case, it will be
necessary to enter the date manually. Year information is stored in nonvolatile memory so that when
operating power is restored after an outage and the clock is re-synchronized the current year is restored.
When the clock rolls over to a new year, the year is automatically incremented in nonvolatile memory. An
alarm bit is included in the programmable alarm function for loss of IRIG signal. The alarm point monitors
for IRIG signal loss once a valid signal is detected at the IRIG port.
Connections
IRIG connections are located on a terminal block shared with the RS-485 and input power terminals.
Terminal designations and functions are shown in Table 110.
Specifications
Interface supports IRIG Standard 200-04, Format B006.
Input Signal ............................................................... Demodulated dc. Level-shifted, digital signal
Input Voltage Range ................................................. ±10 Vdc maximum
Input Resistance ....................................................... Nonlinear, approximately 4 kΩ at 3.5 Vdc,
Logic Voltage Threshold
High ........................................................................... 3.5 Vdc minimum
Low ............................................................................ 0.5 Vdc maximum

Real-Time Clock Specifications

Resolution ................................................................. 1 s
Accuracy.................................................................... ±1.73 s/d at 25°C
Clock Holdup
Capacitor Holdup Time ............................................. Up to 24 hours depending on conditions
Battery Holdup Time ................................................. Greater than 5 years depending on conditions
Battery Type .............................................................. Rayovac BR2032, coin-type, 3 Vdc, 195 mAh
BE1-11g
Figure 260. Status, Real Time Clock Screen
Table 110. IRIG Terminal Assignments
Terminal
A1
A2
Function
(+) Signal
(–) Reference
approximately 3 kΩ at 20 Vdc
Basler Electric P/N 38526
333
Timekeeping