Viconics R850 Series Manual

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DESCRIPTION
The Viconics R850V series step controller is designed for
cost effective, precise modulation of multi-stage control
application. A common application is a multi step electric
duct heater.
An integrated vernier control output will give a precise and
full modulation of the load from 0 to 100% of the total
capacity.
FEATURES AND BENEFITS
Microcomputer-based design
Adjustable inter-stage delay
Adjustable Vernier ratio
Choice of pulsed or analog
Vernier output
Up to 16 stages
Choice of LIFO or FIFO
sequencing
Test button
MODELS AVAILABLE
The R850-V is available in 2 models
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R850V-4 4 stage unit
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R850V-8 8 stage unit
If more than 8 stage are required, the R850-V8 can be used
as a master unit with another R850V as a slave unit. Adding
another unit ( R850-V4 or R850-V8 ) can bring the total step
number up to 12 or 16.
INPUT SIGNAL
The R850V has four INPUT dip switch (S1 to S4) to select the control signal input:
They are compatible with industry standard signals.
DIP SWITCH ADJUSTMENTS & WIRING CONTROL INPUT
R850V-8
ON
1 2 3 4
(1-4) Input
signal selection
ON
0 to 10 Vdc
1 2 3 4
ON
4 to 20 mA
1 2 3 4
ON
0 to 135
Ω
1 2 3 4
Input Signal Switch
0 to 10 Vdc control signal ( 2 to 10 Vdc control range )
4 to 20 mA control signal
0 to 135 Ω control signal
If a slave unit is used, wire the control signal input to the master unit only
R850V STEP CONTROLLER
WITH INTEGRATED VERNIER STAGE
Pulsed or analog 0 to 10 Vdc vernier stage
4 or 8 step models
Up to 16 stage total with a slave unit
Test button
Accuracy and reliability
Provides flexibility in
replacement applications
Simplifies design of
proportional stage
Permits use of SCR or lower
cost SSR
One product family can handle
all applications
Increased flexibility of FIFO
permits even use of contactors
Quick troubleshooting
ON
1 2 3 4 5 6
(3-6) Number of steps selection
(see next pages for details)
(2) Vernier stage selection
OFF = 0 to 10 Vdc (SCR)
ON = Vdc pulsed signal (SSR)
(1) Sequence of operation
(LIFO or FIFO)
OFF = LIFO (Last IN, First OUT)
ON = FIFO (First IN, First OUT)
Innovative Control Solutions For Your Needs
R850 SERIES
OVERRIDE TEST BUTTON
The override test button can be used to by-pass the
interstage delay and bring on all stage at one time. This
simplifies the verification of configured maximum number of
stage.
A status LED per step will come on for each of the configured
stage.
SPECIFICATIONS
Operating 0°C to 80°C ( 32°F to 176°F )
Conditions: 0 % to 95 % R.H. non-condensing
Relay outputs: Isolated relay 30 Vac @ 1.0 amps. max. per
output, up to a maximum of 4.0 amps. total
per R850 controller. See application note 02.
Vernier stage: Vdc pulsed: 6 Vdc, 30 mA max.
0 to 10 Vdc 5 mA max.
Input
0 to 10 Vdc into 10 KΩ minimum
impedance:
Power supply: 24 Vac -15%, +10% 50/60 Hz; 4 VA
Use a Class 1 ( properly fused ) or Class 2,
CSA or UL recognized transformer for power
supply & relay outputs.
Specifications and equipment are subject to change without prior notice.
R850V-4
ON ON
1 2 3 4 4 1 2 2
(1-4) Input
signal selection
ON
0 to 10 Vdc
1 2 3 4
ON
4 to 20 mA
1 2 3 4
ON
0 to 135
Ω
1 2 3 4
Switch #1 Switch #2
Off Off
Off Off
On On
3 4
(3-4) Number of steps selection
(see next pages for details)
(2) Vernier stage selection
OFF = 0 to 10 Vdc (SCR)
ON = Vdc pulsed signal (SSR)
(1) Sequence of operation
(LIFO or FIFO)
OFF = LIFO (Last IN, First OUT)
ON = FIFO (First IN, First OUT)
Switch #3 Switch #4
Off On
On Off
Off Off