Manualsbrain.com
  1. Manuals
  2. Brands
  3. Honeywell
  4. QS7800B
  5. User Manual

Honeywell QS7800B User Manual

Download
Page of 8
QS7800B NETWORK INTERFACE CONTROLBUS™ MODULE FOR MULTI-DROPPING 7800 SERIES RELAY MODULES
65-0227—2
4
a. Near a phone line.
b. Within 4000 ft (1219 m) of all Relay Modules 
connected to the Network Interface Unit.
c. Within 50 ft (15 m) of the personal computer 
connected to the 25-pin RS-232 port of the Network 
Interface Unit.
4.
Mount the Network Interface Unit and insert the 
ControlBus™ Module into the Network Interface Unit 
slot, see Fig. 2 and 5.
•
Route the ControlBus™ cable so that all devices are 
connected in a daisy chain configuration. It is 
recommended that the QS7800B ControlBus™ Module be 
at one end of the daisy chain.
5.
Connect L1, L2 and Ground (GND) to the pigtails 
(Q7700A only).
6.
Insert the plug-in cards into the open slots of the 
Network Interface Unit, starting with slot one.
7.
Install the covers, power wiring compartment and 
Network Interface Unit. 
8.
Connect the serial port of the modem to the 9-pin 
RS-232 connector of the Network Interface Unit (see 
Fig 4).
9.
Connect the serial port of the personal computer to the 
25-pin RS-232C port on the Network Interface Unit for 
local personal computer application, see Fig. 3.
10.
Do not exceed 600 mA current draw, six card maximum, 
total capacity of the plug-in cards. Refer to the 
ControlBus™ Module device label and this specification 
for individual loads.
11.
Recheck all wiring with Fig. 6.
12.
Restore power to the Network Interface Unit.
Fig. 1. QS7800B Network Interface ControlBus™ Module 
dimensions in in. (mm).
Fig. 2. ControlBus™ Module mounting.
Fig. 3. RS-232 Interface insertion 
(serial communications).
Fig. 4. Modem insertion, Network Interface Unit.
Fig. 5. ControlBus™ RS-485 interface insertion.
1 (25)
M2093
3-29/32
(99)
4-21/32 (118)
M7437B
ELECTRICAL
CONNECTOR
EDGE
CONNECTOR
CONTROLBUS™
MODULE
NETWORK
INTERFACE
UNIT
25-PIN 
RS-232C
CONNECTOR
NETWORK
INTERFACE
UNIT
M7432B
CONTROLBUS™
PLUG-IN MODULE
9-PIN RS-232
CONNECTOR
RS-232C CONNECTOR
(SERIAL COMMUNICATIONS)
M7433B
NETWORK
INTERFACE UNIT
CONTROLBUS™
MODULE
CONTROLBUS
RS-485 CONNECTOR
NETWORK 
INTERFACE UNIT 
M7436B