TREND IQ422 - Page 10

10 IQ422, IQ4NC/00, IQ4NC/12 Controllers Installation Instructions - Mounting TG201264 Issue 12, 04-Feb-2020. Applies to v4.30.
IQ422, IQ4NC/00, IQ4NC/12 Installation Instructions - Mounting
14
Connect Wallbus (if required - not applicable to IQ4NC/00/..)
15
Connect Serial MODBUS (/INT only if required)
Connect to RS485 Port or RS232 Port as required
3 INSTALLATION (continued)
IQ4 Conguration Manual
(TE201263)
Example wiring
80 81
WMB
e.g RD-WMB
Polarity independent
to additional
wallbus devices
Terminal size: 0.14 to 2.5 mm
2
(22 to 12 AWG).
Terminal screw torque: 0.45 to 0.62 Nm (4 to 5.5 lb.in).
Cable type: Unscreened twisted pair.
Maximum cable length: 60 m (200 ft) in total, used to connect
all wallbus devices.
Number of Devices: up to 14 (subject to power loading -
refer to device documentation)
IQ4 Conguration Manual
(TE201263)
Address range: up to 254
Number of devices: Dependant on ‘unit’ load. A MODBUS
segment supports up to 32 ‘unit’
loads. Each MODBUS device has
a di󰀨erent unit load (1, 0.5, or 0.25)
- refer to device documentation for
the electrical load. IQ4 = 1 electrical
load. If more than 32 ‘unit’ loads are
required a MODBUS repeater can be
used.
MODBUS
Externally powered RS232
to RS485 convertor
RS-485
82
83
MODBUS
MODBUS
devices
MODBUS
device
MODBUS
device
CABLE-IQ4INTRS232
RS-232 Port (local supervisor)
RS-485 Port
IQ422, IQ4NC/00, IQ4NC/12
RS232 Port
PIN outs See step 13 RS-232 system.
Terminal size: RJ11 (FCC68)
Cables:
RJ11 to 9way male D type (CABLE-IQ4INTRS232)
externally powered RS232 to RS485 convertor
Unscreened twisted pair for main MODBUS
Maximum cable length: 60 m (200 ft).
RS485 Port
Terminal size: 0.14 to 2.5 mm
2
(22 to 12 AWG).
Terminal screw torque: 0.45 to 0.62 Nm (4 to 5.5 lb.in).
Cable type: Unscreened twisted pair.
Maximum cable length: 60 m (200 ft).
120 Ohm
terminator
Terminator
switch ON