Rated operational

Non-rep. voltage

Control voltage

Supply voltage

Alarm output

Rated operational

voltage

type

current
50 A

230 VACrms

650 Vp

4 - 32 VDC

24 VDC

NPN, NO

RJCS1A23D50EPNO

PNP, NO

RJCS1A23D50EPPO

600 VACrms

1200 Vp

4 - 32 VDC

24 VDC

NPN, NO

RJCS1A60D50EPNO

PNP NO

RJCS1A60D50EPPO

Solid State Relay
Current Sensing
Number of poles
Switching mode
Rated operational voltage
Control voltage
Rated operational current
Terminal layout
Over-temperature protection
Alarm output type

Specifications are subject to change without notice (27.06.2006)

· AC semiconductor contactor
· Integrated under current monitoring
· Zero switching (RJCS1A)
· Direct copper bonding (DCB) technology
· LED-indication
· Cage clamp output terminals
· 4-32 VDC control input
· Operational ratings up to 50 AACrms and 600 VAC
· Local and remote alarm status
· Set-point adjustable
· Time delay adjustable
· Local and remote setup

Product Description

Ordering Key

The SOLITRON Midi Current
Sensing is a compact, single-
phase SSR that is sensitive to
variations in load conditions in
industrial heating applications.
This microprocessor-based
device is ideal for detection of
partial load failure and to
ensure the highest process
quality. Current sensing is inte-
grated inside to eliminate the
need to install an external cur-
rent transformer. A membrane
"button" on the front is used to
effect a simple "teach in" of the
current setpoint. Alarm delay
time is set by a potentiometer.

A drop

in setpoint current of

more than

13%

will trigger an

open collector alarm. Up to 50
alarm outputs can be connect-

ed in parallel to a standard PLC
input. Typical conditions that
can be detected are heater
break or open-circuit, blown
fuse, semiconductor short-cir-
cuit and faulty power connec-
tion.

Device over-temperature pro-
tection is integrated as a stan-
dard feature.

The product is ready to mount
on DIN-rail or chassis and
comes with integral heatsink.
The standard housing dimen-
sions enable straightforward
replacement of alternative
products.

Solid State Relays
SOLITRON MIDI Current Sensing
Type RJCS

Type Selection

Switching

Rated operational Control

Rated operational Terminal

Protection

Alarm output

mode

voltage

current

layout

type

A: Zero switching 23: 230 VACrms

D: 4 - 32 VDC 50: 50 AACrms

E: Contactor P: Over-temp.

NO: NPN, Normally open

60: 600 VACrms

protection

PO: PNP, Normally open

Selection Guide

RJ CS 1 A 60 D 50 E P NO

Rated operational current

AC51 @Ta=25ºC

50 AACrms

AC53a @Ta=25°C

30 AACrms

Min. TEACH current

8 AACrms

Min. partial load current

1.3 AACrms

Rep. overload current t = 1s

< 200 AACrms

Non rep. surge current
Tj(init.) = 25ºC and t = 10 ms

1900 Ap

Off-state leakage current @
rated voltage and frequency

< 3 mArms

t for fusing t = 10 ms

18000 A

On-state voltage drop @
rated current

1.6 Vrms

Critical dV/dt off-state

1000 V/µs

Specifications are subject to change without notice (27.06.2006)

RJCS

Input Specifications

Supply Specifications

Output Specifications

Control voltage range

4 - 32 VDC

Pick-up voltage

3.8 VDC

Reverse voltage

32 VDC

Drop-out voltage

1.2 VDC

Maximum control input current

1.5 mA

Response time pick-up

1/2 cycle

Response time drop-out

1/2 cycle

Thermal Specifications

Operating temperature

-20 to +60ºC (-4 to +140 °F)

Storage temperature

-40 to +100ºC (-40 to +212 °F)

Weight

Approx. 380 g

Housing material

PBT Flame retardant

Control terminal cable size

Min

1 x 0.5 mm

(1 x AWG20)

Max

1 x 4.0 mm

(1 x AWG12) or

2 x 2.5 mm

(2 x AWG14)

Mounting torque max.

0.6 Nm Posidriv 0 bit

Control terminal screws

Power terminal cable size

Min

1 x 4 mm

(1 x AWG12)

Max

1 x 25 mm

(1 x AWG3) or

2 x 10 mm

(2 x AWG6)

Mounting torque max.

2.5 Nm Posidriv 2 bit

Power terminal screws

Housing Specifications

Insulation

Rated insulation voltage

Input to output

4000 VACrms

Output to case

4000 VACrms

General Specifications

Alarm Specifications

Output current, i

50 mADC

Output voltage

NPN

1 + 0.15i

PNP

Vcc - 1 - 0.15i

No. of outputs in parallel

Power supply voltage, Vcc

24 VDC ± 15%

Max. supply current

22 mA (per device)

Max. PLC current @ 24VDC

275 µA (per device)

durning normal conditions

RJCS1.23..

RJCS1.60..

Operational voltage range

24 to 265 VAC

42 to 660 VAC

Non-rep. peak voltage

650 V

1200 V

Operational frequency range

45 to 65 Hz

Measuring range

8-50 AACrms

Power factor

0.5 @ 230 VACrms

0.5 @ 600 VACrms

Approvals

UL, cUL

CE-marking

Yes

Supply status indication

Green LED, half intensity

Control status indication

Green LED

Over-temperature alarm trip indication

Red LED, intermittent

Alarm indication (excpect for over-temperature trip)

Red LED

Specifications are subject to change without notice (27.06.2006)

Alarm Operation

1.1 Current Setpoint
The current setpoint is the
nominal operating current
that is expected when all the
heater loads are functioning
properly. If the heater loads
are faulty or the supply volt-
age is not close to the nomi-
nal level, the wrong setpoint
will be stored.

1.2 Initialisation
When the device is shipped,
no setpoint is stored in the
flash memory. Both green
and red LEDs will flash inter-
mittently to indicate that a
setpoint must be stored
using the TEACH procedure.

1.3 Local Functions
Local functions can be acti-
vated by using the push
button on the front of the
device. While an alarm is
being issued by any SSR
connected to the common
alarm line, no local com-
mands are accepted.

1.3.1 Local TEACH
Press and hold the push but-
ton for approximately 3 sec-
onds. The red LED will flash
after each second. After the
LED flashes 3 times, release
the button. If the "teach"
command has been accept-
ed the heater loads are auto-
matically switched ON. The
red LED will flash quickly 10
times. When the current set-
point has been stored suc-
cessfully, the red and green
LEDs will scroll intermittently
to indicate that the TEACH
procedure has been com-
pleted.
It is very important to hold
the button down for only 3
flashes of the red LED to
make a successful TEACH.
If the TEACH procedure is
not successful, the device
will automatically reset to
factory default (i.e. no set-
point stored).

1.3.2 Local RESET
When an alarm has occurred
the device can be locally
RESET by pressing the push
button for 1 second. The red
LED will flash once. This will
reset the alarm. If the alarm
condition has been cleared

the device will return to nor-
mal operation. If the alarm
condition is still active, the
device will automatically go
back to alarm status.

1.3.3 Local TEST
In the absence of a signal on
the "control input" terminal,
a local TEST can be made
by pressing and holding the
button for 5 seconds. After
the red LED flashes 5 times,
release the button. The
device will switch ON the
loads for 1 second. This test
detects if there is an under-
current or heater break alarm
condition.

1.4 Remote Setup
Procedure
Remote functions can be
activated with a PLC or any
other logic controller by
applying timed pulses to the
alarm terminal: >10V for
RJCS...PO and <10V for
RJCS...NO.

1.4.1 Remote TEACH
Apply a 3 second pulse. The
red LED will flash after each
second. After the LED flash-
es 3 times and the "teach"
command has been accept-
ed, the heater loads (of all
SSRs connected to the
same alarm line) are auto-
matically switched ON and
the red LED will flash quickly
10 times. When the current
setpoint has been stored
successfully, the red and
green LEDs will scroll inter-
mittently to indicate that the
TEACH procedure has been
completed.

1.4.2 Remote RESET/
UNBLOCK
When an alarm has occurred
the device can be remotely
RESET by applying a 1 sec-
ond pulse. A 1 second pulse
will also unblock local
TEACH of all SSRs connect-
ed to the similar alarm line.
The red LED will flash once.
This will reset the alarm. If
the alarm condition has been
cleared the device will return
to normal operation. If the
alarm condition is still active,
the device will automatically
go back to alarm status.

1.4.3 Remote BLOCK
Applying a 5 second pulse
will induce the device to
block local TEACH. After
this, no local TEACH com-
mands are accepted. To
unblock this situation, a
remote RESET must be
issued. If 24V supply is
removed, local TEACH
BLOCK is lost. Another
REMOTE BLOCK should be
issued.

2 Alarms
2.1 Alarm DELAY
A potentiometer on the front
of the device allows a time
delay on the heater break
alarm between 2 and 40
seconds. For an alarm signal
to occur, the alarm condition
must persist throughout this
time period. The alarm out-
put is enabled only after this
time delay has passed.
However, if the control input
is disabled for a period of
time equal to four times the
delay setting, the internal
alarm delay count is reset
automatically.

2.2 Relay remains OFF due
to Line Voltage Loss or
Thyristor Open Circuit
Failure.
The device generates one
pulse with duration of 7 sec-
onds on the alarm terminal.
This alarm is non-latching.
The red LED remains ON
after this alarm condition
until a RESET is issued.

2.3 Heater Break.
A Heater Break alarm is
given if the current mea-
sured through the device is
13% less than the Current
Setpoint stored in the flash
memory. The device gener-
ates one pulse with duration
of 8 seconds on the alarm
terminal. The alarm signal is
non-latching. The red LED
remains ON after this alarm
condition until a RESET is
made. If the measured cur-
rent changes to within 10%
of the Current Setpoint,
before the Alarm DELAY
time has elapsed, the Alarm
DELAY timer is reset.

2.4 Over-temperature or
Over-current.
This alarm occurs if any one
of following two conditions
is true:
1. The device detects an
internal over-temperature
condition at any time during
operation and switches off
the output. The red LED
flashes intermittently.
2. A current above the nomi-
nal device rating is mea-
sured during current set-
point TEACH. This action
erases the current setpoint
from flash memory and both
red and green LEDs will flash
intermittently until a TEACH
procedure with an accept-
able current is carried out.

In both cases, the device
generates one pulse with
duration of 9 seconds on the
alarm terminal. The alarm
signal is non-latching.

2.5 Thyristor Short Circuit.
The device generates one
pulse with duration of 10
seconds on the alarm termi-
nal. The alarm signal is non-
latching.
The red LED remains ON
after this alarm condition
until a RESET is made.

2.6 Alarms Connected in
Parallel to one PLC Input
and one PLC Output.
For REMOTE operation, up
to 50 devices can be con-
nected in parallel to at least
one PLC input. This PLC
input must also be connect-
ed in parallel to the PLC out-
put. The PLC input must be
programmed to detect
alarms while the PLC output
must be programmed to
supply the pulses required
for REMOTE Setup. When
more than one device is pre-
sent, pulses from the PLC
output or alarm pulses from
any device will cause the red
LEDs on all devices in paral-
lel to flash intermittently for a
max. of 6.25 seconds. After
this time, if there is a device
in alarm condition, only the
red LED of that device will
be ON.

RJCS

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