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9-PIN RS-232
CONNECTOR
RS-232C CONNECTOR
(SERIAL COMMUNICATIONS)
Fig. 4. Modem insertion, Network Interface Unit.
6
UNIVERSAL
POWER
SUPPLY
1
120V
L1
60 Hz
L2
POWER
SUPPLY
GND
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED:
Q7700A:120VAC, 50/60 HZ; Q7700B: 100-250VAC, 50/60 HZ UNIVERSAL POWER SUPPLY.
2
CONNECT PIGTAIL LEADWIRES: (Q7700A ONLY)
BLACK—L1
WHITE—L2
GREEN—GROUND
3
THE SYSTEM CONTROLBUS™ MUST BE ROUTED SO THAT ALL DEVICES ARE CONNECTED DAISY CHAIN CONFIGURATION (A-A, B-B, C-C).
THE SYSTEM CHASSIS AND PROGRAM MODULES MUST BE AT ONE END OF THE STRING, THE INTERCONNECTION OF DEVICES IS NOT
IMPORTANT, EXCEPT THE DEVICE ON THE FARTHEST END OF THE DAISY CHAIN CONFIGURATION STRING MUST BE TERMINATED
WITH A 120 OHM 1/4 WATT RESISTOR BETWEEN TERMINALS A AND B, REMOVE ANY OTHER TERMINATION RESISTORS.
4
THREE-WIRE SHIELDED CABLE REQUIRED FOR CONNECTIONS MORE THAN 100 FEET. CABLE SHIELD MUST BE TERMINATED TO
EARTH GROUND. IF SHIELDED CABLE IS NOT USED, TWISTED PAIR WIRE MUST BE USED.
5
UP TO SIX SYSTEMS CAN BE INTERFACED WITH THE NETWORK INTERFACE UNIT. EACH SYSTEM MUST RESIDE ON
A SEPARATE CONTROLBUS. NO TWO SYSTEMS SHOULD RESIDE ON ONE CONTROLBUS.
6
FOR Q7700B.
SYSNet™ QS7700A NETWORK INTERFACE ControlBus™ MODULE
NETWORK
INTERFACE UNIT
CONTROLBUS™
PLUG-IN MODULE
M7433B
NETWORK INTERFACE UNIT
PLUG-IN
PLUG-IN
3
120 OHM
2
A
B
C
1/4 WATT
4
KEYBOARD AND
A
B
C
DISPLAY
Fig 6. Network Interface wiring.
5
CONTROLBUS
RS-485 CONNECTOR
NETWORK
INTERFACE UNIT
Fig. 5. ControlBus™ RS-485 interface insertion.
5
SYSTEM 2
CHASSIS
C
B
A
CONTROLBUS
MODULE
M7436B
M1456B
63-2284—2
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