Turbo PMAC2 Hardware Reference Manual
Connector Pinouts
19
TB1 (2/4-Pin Terminal Block)
This terminal block can be used to provide the input for the power supply for the circuits on the
PMAC2 board when it is not in a bus configuration. When the PMAC2 is in a bus configuration,
these supplies automatically come through the bus connector from the bus power supply; in this
case, this terminal block should not be used.
Pin# Symbol Function
Description
Notes
1 GND COMMON
Reference
Voltage
2
+5V
INPUT
Positive Supply Voltage
Supplies all PMAC digital
circuits
3 +12V INPUT
Positive
Supply
Voltage
+12V to +15V; not req'd on-
board; used on J1 to supply
analog inputs
4
-12V
INPUT
Negative Supply Voltage
-12V to –15V; required for
Opt-12 ADCs; used on J1 to
supply analog inputs
Note:
Unless Option 12 (Analog-to-Digital Converters) is included on the board, only pins 1 and 2 will be
provided on this terminal block.
TB2 (4-Pin Terminal Block)
This terminal block provides the output for PMAC2's watchdog timer relay, both normally open
and normally closed contacts.
Pin# Symbol Function
Description
Notes
1
WD_NC
OUTPUT
Watchdog Relay Out
Normally closed
2
COM
INPUT
Watchdog Return
+V or 0V
3
WD_NO
OUTPUT
Watchdog Relay Out
Normally open
4
COM
INPUT
Watchdog Return
+V or 0V
Note: The "normally-closed" relay contact is open while PMAC2 is operating properly -- it has
power and the watchdog timer is not tripped -- and closed when the PMAC2 is not operating
properly -- either it has lost power or the watchdog timer has tripped. The "normally-open" relay
contact is closed while PMAC2 is operating properly, and open when PMAC2 is not operating
properly.
MACRO Interface Connectors
Option A: Fiber Optic Transceiver
U35 Lower port: Transmit Optical Data
U35 Upper port: Receive Optical Data
Option C: RJ-45 "Phone Jack" Connectors
J14:
Receive
Data
J17: Transmit Data
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