2
Installation
21
EN-RaychemHWATECOcontroller-IM-H57340 03/13
HWAT
heating
cable
L
L
208/240V
HWAT
heating
cable
Master
Slave 1
Slave 2
RS-485
RS-485
Sensor
BMS
Alarm
L L
208/240V
L
L
208/240V
HWAT
heating
cable
Figure 13: Connecting multiple controllers (with
RS-485)
When multiple
controllers are
networked and you are
using BMS and Alarm
functions, you must
use a 4-wire conductor.
max. 20 AWG
(0.5 mm
2
)
max. 24 AWG
(0.2 mm
2
)
Figure 14: Combine alarm and BMS wire in 4-wire
cable
Important: For master/slave combination with
alarm function, the alarms are connected in series by
a RS485 wire. Since the cable gland grommet has only
3 holes, you must combine the alarm wire and the BMS
wire in a 4-wire cable.
