DNET-IP2 USER MANUAL ISSUE 4
-25-
6. I.S. Communications
An intrinsically safe link consisting of
approved IS Barriers is required to allow
Integrated Protection Relays to transmit their
data from a hazardous area to a remote PLC.
The equipment in the hazardous area must be
enclosed in a flameproof enclosure.
6.1 PLC RS232 IS Link
The IS link consists of two MTL 3058 general
purpose serial data interfaces and associated
MTL 3991 24V DC power supplies. (See
Connection Diagram, Drawing DNET-E-012,
Page 25).
A standard Belden type cable, connected
between the two serial data interfaces would
allow communications up to a distance of 2
kilometres at the communication rate of 9600
baud.
6.2 PLC RS485/RS422 IS Link
The IS link consists of two MTL 776AC or
P&F 955 passive IS Barriers per DNET-IP2
System. Multiple DNET-IP2 Systems may be
able to be multi drop connected in hazardous
areas depending on cable parameters.
A standard Belden type cable, connected
between the IS Barriers would allow
communications up to a distance of 500 metres
at the communication rate of 9600 baud (See
Drawing DNET-E-011, Page 26).
7. Specifications
Controller
Supply Volts:
20V-0V-20V AC
±
10%, 15VA
L1 Operating Range:
Series resistance 250 ohms
Shunt Resistance 1000 ohms
Capacitance 0.1
μ
f
Communications:
Baud Rate 1200, 2400, 4800, 9600
Protocol – Modbus, IP2 and IP
Dimensions:
100 W x 75 D x 110 H mm (DIN Rail Mount)
Power Supply
Supply Volts:
110V / 20V-0V-20V 15 VA (DIN Rail Mount)
Dimensions:
55 W x 75 D x 110 H mm
8. Equipment List
101270 DNET-IP2 Protocol Converter
101539 DNET-IP2 Power Supply
110V/20V-0V-20V, 15 VA
101501 IPSI-IP Serial Interface Module
