Johnson Controls IFC-1010 Technical Manual page 56

System Harness
Connections
NVRAMS
Board
SIB-NET
56 Hardware Installation—Installing the IFC-1010/2020
The power harness (Part Number 71030) provides internal power for
circuit boards installed in the ICA-4L. Connect this harness from P2 or P4
on the MPS-24A or MPS-24AE to Plug A on the uppermost ICA-4L
(see Figure 29).
The IFC-1010/2020 monitors the power supply through connection of a
power supply supervision cable (Part Number 71031) between MPS-24A
or MPS-24AE Connector P3 and Connector P2 on the CPU (refer to
Figure 29). If the MPS-24A or MPS-24AE is being used as a remote
power supply, this ribbon cable should be plugged into the MPS-TR
module. The MPS-TR provides a Form-C trouble contact that can be
monitored by a monitor module with an MTRB Type ID.
Note: For connection of an MPS-TR, refer to the MPS-TR Product
Installation document.
User programming information and critical operating parameters of the
IFC-1010/2020 system are stored in Non-volatile Random Access Memory
(Dallas NVRAM). Improper cycling of power to the IFC-1010/2020 can
cause the NVRAMS to become inaccessible. The IFC-1010/2020 software
now verifies the state of the NVRAMs.
been detected, the IFC-1010/2020 will display one of the following two
error messages depending on where the problem is located:
TROUBL CATASTROPHIC CPU NONVOLATILE RAM FAILURE
TROUBL CATASTROPHIC DIA NONVOLATILE RAM FAILURE
Other indicators of NVRAM problems by board are:
Trouble Message Displayed
TROUBL CATASTROPHIC ISIB
COMMUNICATIONS FAULT
If this condition occurs, call Field Support Services in Milwaukee for
immediate assistance.
N20
If a NVRAM problem has
or
Local Board Indicator
ATXD LED blinking at
2 second rate.