Emerson Rosemount Analytical RDO, Manual

Page: 11 / 32

11
MODEL RDO WIRING
2.5 ANALOG AND DIGITAL OUTPUTS AND
LOW VOLTAGE RELAY CONNECTIONS
Terminal Description
GND Signal ground
485A- RS485 negative
485A+ RS485 positive
POWER 24VDC
3. Wire the analog current loops to the 4/20 mA termi-
nals. Each analog output loop must be powered sep-
arately. The maximum voltage at the terminal must not
exceed 36VDC. The minimum voltage is 9VDC.
Connect the shield to the green earth ground screw.
See Figure 2-4. Do not ground the device at both ends
of the cable.
Terminal Description
LOOP2- To negative end of device
LOOP2+ To positive end of device
LOOP1- To negative end of device
LOOP1+ To positive end of device
GREEN EARTH Cable shield
1. Remove the front cover of the enclosure.
2. Connect the digital output (Modbus/RS485) to the
PLC terminals (see Figure 2-3). There is no con-
nection to the GND and POWER terminals.
However, the analyzer supplies 24VDC to the GND
and POWER terminals, which can be used to power
external accessories.
FIGURE 2-3. Input/Output board
Requires 24-12 AWG cable.
Requires stripped and tinned
RuggedCable
®
system
Requires stripped and tinned
RuggedCable
®
system
Requires 24-12 AWG cable
Requires 24-12 AWG cable
Requires 24-12 AWG cable
DANGER
Make sure that power to the instrument is discon-
nected before making any wiring connections.
DANGER
Débrancher toute alimentation à l'appareil avant de
connecter les fils.
DANGER
The maximum voltage that can be applied across
the loop terminals is 36 V.
DANGER
Ne pas connecter des circuits basse tension
(moins de 50 V) aux bornes de connexion sur la
carte électronique de secteur (courant alternatif)!
CONNEXIONS POUR AUTOMATE
PROGRAMMABLE INDUSTRIEL
DANGER
Do not connect high voltage circuits (>50 V) to the
terminal connectors on the I/O board!
SORTIES DE COURANT DE BOUCLE
DANGER
Ne pas connecter des circuits a haute tension (plus
de 50 V) aux bornes de connexion sur la carte
entrées/sorties!