Mercury Security © 2017
MS-ICS
DOC 10107-0053
REV 1.02
Page 3
MS-ICS to MS-ACS
TB2
– 2-wire RS-485
The 34-conductor ribbon cable is non-standard. Do use a floppy disk drive cable.
IMPORTANT NOTE!
Install the termination jumper (MS-ICS jumper J8), ONLY on the panel at each end
of the RS-485 bus. Failure to do so will compromise the proper operation of the communication channel!
6. Memory and Real Time Clock Backup Battery:
The static RAM and the real time clock are backed up by a lithium battery when input power is removed. This
battery should be replaced annually. If data in the static RAM is determined to be corrupt after power up, all
data, including flash memory, is considered invalid and is erased. All configuration data must be re-
downloaded. Remove the insulator from the battery holder after installation. Battery type: BR2325, BR2330,
or CR2330.
7. Status LEDs:
Power-up
: All LED's
OFF.
Initialization:
LED's 1 through 6 are sequenced during initialization. LED's 1, 3, and 5 are turned ON for
approximately 1.5 seconds after the hardware initialization has completed, then the application code is
initialized. The amount of time the application takes to initialize depends on the size of the database, about 3
seconds without a card database. Each 10,000 cards will add about 3 seconds to the application initialization.
When LED's 1 through 4 flash at the same time, data is being read from or written to flash memory, do not
cycle power when in this state. If the sequence stops or repeats, perform the bulk erase procedure, see
section 8.
Running:
LED
DESCRIPTION
1
Off-Line / On-Line and Battery Status
Off-Line = 20% ON, On-Line = 80% ON
Double Flash if Battery is Low
2
Host Communication Activity (Ethernet or Serial Port 1)
3
Port 2 Communication Activity
4
Port 3 Communication Activity
5
Reserved for future use
6
Reserved for future use
D7
Host Communication (Ethernet Port 0)
YEL
On-board Ethernet Speed: OFF = 10Mb/S, ON = 100Mb/S (Yellow LED)
GRN
OFF = No Link, ON = Good Link (Green LED), Flashing = Ethernet Activity
J1
J5
J1 of MS-ICS
34-CONDUCTOR
RIBBON CABLE
SEE NOTE BELOW
J5 OF MS-ACS
KEY
KEY
GND
TR+
TR-
TB2
To serial I/O Devices
4
1
J8