Carel GATEWAYBN0, User Manual

Page: 40 / 48

BACnet Gateway
Carel Cod. +030221110 rel. 2.4 del 17/12/02
14
7 CONNECTION CABLES AND HARDWARE SETTINGS
7.1 Connection cables
7.1.1 Gateway connection cables- Carel peripherals in RS485 line
The Gateway connection cable with the Carel peripherals (connector Carel Net) in RS485 suggested by Carel is:
•
with 2 twisted wires,
•
shielded, preferably with continuity wire,
•
AWG20 (0,5mm
2
) section or AWG22 (0,32
÷
0,38mm
2
),
•
capacity between the conductors lower than 100 pF/m (the models 8761 and 8762 of the Belden, for example, satisfy the
previous requirements)
•
with the following pin-out:
1
2
3
4
5
Carel network
G + - G + -
120 Ohm
....
Gateway (Carel Net conn.)
9-pole male
Tx/rx-
Tx/rx+
Gnd
Fig. 7.1.1.1 - Connection in 485
7.1.2 Gateway connection cables- Carel peripherals in RS422 line
The Gateway connection cable with Carel peripherals (connector Carel Net) in RS422 suggested by Carel (code
98C136C004) is:
•
with 6 wires;
•
shielded, preferably with continuity wire;
•
AWG24 section;
•
with the following pin-out:
6
7
Peripheral deriv. box (code 98C145C034)
9-pole male 9-pole female
Gateway (Carel Net conn.)
1
2
3
4
5
gnd
rx+
rx-
tx+
tx-
gnd
tx+
tx-
rx+
rx-
1
2
3
4
5
Fig. 7.1.2.1 - Connection in 422
WARNING. Pay attention to the pins 6 and 7 of the connector on the Gateway side. They must be short-circuited as shown
in figure: 6 short-circuited with 2; 7 short-circuited with 3.