9323 Hamilton Mentor, Ohio 44060 - USA Tel:+1-440-357-1400 Fax:+1-440-357-1416

Scientific Solutions' - Solid State Relays (SSR)

Digital I/O signals from the computer are typically TTL type of signals. This means that they are 5v logic and can typically source/sink current in the 15 to 64ma range. If you need to control or sense higher voltage signals (example 60v DC or 120v/240v AC) and/or higher current signals (example 3 Amps instead of 64ma), then a solution could be to use Solid-State-Relays (SSR).

Our Solid State Relays are implemented as pluggable modules that can be installed into a "Solid State Relay Rack". The SSR modules provide a convenient method for interfacing real world signals to the computer interface. The modules come in 4 flavors (which are also made in different colors to help distinguish them)

• DC OUTPUT
  
• AC OUTPUT
• DC INPUT
• AC INPUT

The OUTPUT modules are used to switch AC or DC loads such as lights, motors, solenoids. The 5v logic signal from the computer controls the SSR, which in turn switches the DC/AC load ON or OFF. The INPUT modules are used to "sense" AC or DC loads - meaning that they are used to monitor the Loads to determine when an AC or DC signal is present. All of the modules have optical isolation circuits that provide a 4000 volt optically isolated barrier between the computer electronics and the Load devices that are being controlled.

The Modules also come in two different sizes: Standard or Mini. The Standard size was the first size introduced a number of years ago. The Mini size is a physically smaller version (saves 35% space). The use of the Mini size allows you to have more Modules in a smaller area. The Relay Racks for the Mini are much smaller than they are for the Standard as discussed later in this document.

Standard Module Dimensions: 1.70" long x 1.25" high x 0.60" wide (43.2mm x 31.8mm x 15.2mm)

Mini Module Dimensions: 1.70" long x 1.00" high x 0.40" wide (43.2mm x 25.4mm x 10.2mm)

DIGITAL OUTPUT MODULES

The AC OUTPUT modules have zero-crossing detection circuitry that ensure that the AC signal is only switched ON or OFF during the zero volt crossing of the AC signal. This is desirable as it greatly reduces generated Electrical Magnetic Interference (EMI) and Radio Frequency Interference (RFI) that are sources of noise. These modules are also highly immune to electrical transients and have built in RC snubber networks for increased capability with inductive loads.  Non-zero crossing modules are also available as an option for those applications that would rather have the EMI/RFI effects but have faster switching times

The DC OUTPUT modules can operate DC loads over a wide voltage range (typically 3 Vdc to 60 Vdc  or  200 Vdc) and have built in spike protection.  The 60 Vdc versions are the most common and offer the faster switching times and handle a larger electrical current.

DIGITAL INPUT MODULES

The INPUT modules are used to monitor the status of and AC or DC loads. For example, you would use these type of modules to determine if a voltage is present such as from a temperature or pressure switch, limit switch or switch toggled manually.

SPECIFICATIONS

The following tables show a picture of both the "Standard" and "Mini" Modules in addition to providing a summary of the specifications.

DC OUTPUT ODC5 (RED Color)
Part Number		0381006 (standard) 0381010 (mini)	0381017 (standard) 0381021 (mini)
Normal State		Normally OPEN	Normally OPEN
SPECIFICATION	UNITS
Maximum Load Voltage	Vdc	60	200
Load Voltage Range	Vdc	3 to 60	4 to 200
On State Voltage Drop (maximum)	Vdc	1.20	1.75
Load Current Range @ 25 deg C	Amp	0.02 to 3.0	0.02 to 1.0
Surge Current maximum for 1 second	Amp	5	5
Power Dissipation	Watt/Amp	1.0	1.5
Max. Off-state Leakage @60Vdc	mA	1.5	0.010
Maximum Turn-on Time	usec	20	75
Maximum Turn-off Time	usec	50	750
Nominal Logic Voltage	Vdc	5	5
Max. Logic Supply Current @ Nominal VCC	mA	14	18
Logic Input Resistance Rx	Ohm	300	220
Minimum Drop Out Voltage	Vdc	1	1
Clamping Voltage (maximum)	Vdc	80	360
Transient Power Dissipation		400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)
Insulation Resistance (Input to Output; Input or Output to Case)	MOhm	10,000	10,000
Dielectric Strength Input to Output (minimum)	Vac (rms)	4000	4000
Input to Output Capacitance (typical)	pF	10	10
Vibration 10-2000Hz per MIL-STD-202, Method 204, Condition D.		20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude
Mechanical Shock per MIL-STD-202, Method 213, Condition F.		1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine
Storage Temperature		-40 C to +125 C
Operating Temperature		-40 C to +100 C

AC OUTPUT OAC5 (BLACK Color)
Part Number		0381005 (standard) 0381009 (mini)	0381016 (standard) 0381020 (mini)
Normal State		Normally OPEN Zero-Crossing Turn-On	Normally OPEN Zero-Crossing Turn-On
SPECIFICATION	UNITS
Nominal Load Voltage	Vac	120	240
Load Voltage Range	Vac	24-140	24-280
On State Voltage Drop (peak)	Volts,max	1.5	1.5
Frequency Range	Hz	25 to 70	25 to 70
Minimum Peak Blocking Voltage	Volts	400	600
Load Current Range @ 25 deg C	Amp, rms	0.03 to 3.0	0.03 to 3.0
Max Surge Current (peak) Do not repeat until module temp returns to steady-state	Amp	80A at 60Hz,1cycle 25A at 60Hz, 60 cycles	80A at 60Hz,1cycle 25A at 60Hz, 60 cycle
Power Dissipation	Watt/Amp	1.0	1.0
Max. Off-state Leakage @60Hz.	mA, rms	2	4
Maximum Turn-on Time (60Hz)	mSec	8.3	8.3
Maximum Turn-off Time (60Hz)	mSec	8.3	8.3
Nominal Logic Voltage	Vdc	5	5
Max. Logic Supply Current @ Nominal VCC	mA	16	16
Nominal Logic Input Resistance Rx	Ohm	240	240
Minimum Drop Out Voltage	Vdc	1	1
Maximum Zero Voltage Offset	Vpeak	8	8
Typical Static dV/dT Measured open circuit conditions; not to exceed peak blocking voltage		3000 volts per mSec	3000 volts per mSec
Load Power Factor (minimum)		0.4	0.4
Insulation Resistance (Input to Output; Input or Output to Case)	MOhm	10,000	10,000
Dielectric Strength Input to Output (minimum)	Vac (rms)	4000	4000
Input to Output Capacitance (typical)	pF	6	6
Vibration 10-2000Hz per MIL-STD-202, Method 204, Condition D.		20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude
Mechanical Shock per MIL-STD-202, Method 213, Condition F.		1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine
Storage Temperature		-40 C to +125 C	-40 C to +125 C
Operating Temperature		-40 C to +100 C	40 C to +100 C

DC INPUT IDC5 (WHITE Color)
Part Number		0381008 (standard) 0381012 (mini)	0381019 (standard) 0381023 (mini)
Input Circuit		Polarized Negative True Logic	Polarized Negative True Logic
SPECIFICATION	UNITS
Maximum Load Voltage	Vdc	32	60
Load Voltage Range	Vdc	3 to 32	35-60
On State Voltage Drop (maximum)	Vdc	0.45 Vdc at 50ma	0.45 Vdc at 50ma
Input Current at Max. Input Voltage	mA	18	6
Max. Off-state Leakage Current	uA	1.0	1.0
Maximum Turn-on Time	mSec	0.20	10
Maximum Turn-off Time	mSec	0.40	10
Nominal Logic Voltage	Vdc	5	5
Max. Logic Supply Current @ Nominal VCC	mA	10	10
Nominal Input Resistance (Rx)	Ohm	1.8K	10K
Min. Drop Out Voltage (Output High)	Vdc	1	9
Min. Pick Up Voltage (Output Low)	Vdc	3	35
Output Current Range	mA	1-50	1-50
Insulation Resistance (Input to Output; Input or Output to Case)	MOhm	10,000	10,000
Dielectric Strength Input to Output (minimum)	Vac (rms)	4000	4000
Vibration 10-2000Hz per MIL-STD-202, Method 204, Condition D.		20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude
Mechanical Shock per MIL-STD-202, Method 213, Condition F.		1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine
Storage Temperature		-40 C to +125 C
Operating Temperature		-40 C to +100 C

AC INPUT IAC5 (YELLOW Color)
Part Number		0381007 (standard) 0381011 (mini)	0381018 (standard) 0381022 (mini)
Input Circuit		Negative True Logic	Negative True Logic
SPECIFICATION	UNITS
Nominal Load Voltage	Vac	120	240
Load Voltage Range	Vac	90-140	180-280
On State Voltage Drop	Vdc	0.45 Vdc at 50mA	0.45 Vdc at 50mA
Input Current at Max Input Voltage	mA, rms	8	6
Max. Off-state Leakage	uA	1	1
Maximum Turn-on Time	mSec	20	20
Maximum Turn-off Time	mSec	20	20
Nominal Logic Voltage	Vdc	5	5
Max. Logic Supply Current @ Nominal VCC	mA	10	10
Nominal Input Resistance Rx	Ohm	22K	60K
Max. Pick Up Voltage (Output Low)	Vac	90	180
Min. Drop Out Voltage (Output High)	Vac	25	50
Insulation Resistance (Input to Output; Input or Output to Case)	MOhm	10,000	10,000
Dielectric Strength Input to Output (minimum)	Vac (rms)	4000	4000
Input to Output Capacitance (typical)	pF	6	6
Vibration 10-2000Hz per MIL-STD-202, Method 204, Condition D.		20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude
Mechanical Shock per MIL-STD-202, Method 213, Condition F.		1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine
Storage Temperature		-40 C to +125 C	-40 C to +125 C
Operating Temperature		-40 C to +100 C	40 C to +100 C

Relay Racks

Relay Racks are circuit boards that have positions to allow the plugging in of the Digital I/O Modules. The Relay Rack has a connector that allows connection of the Relay Rack to one of Scientific Solutions interface cards such as the BaseBoard/PCI, LabMaster DMA, ADEX, PRO or LabTender. The Relay Rack also has screw terminal "pairs" for each of the modules. These screw terminals are used to connect to your AC or DC load.

Relay Racks come in different sizes to accommodate a different number of Modules. Typical Racks accommodate 8 or 24 Modules. Also, there are different Relay Racks for the Standard versus the Mini size of SSR Modules.

Keep in mind that many times the Digital I/O from the computer is programmable as INPUT or OUTPUT in 8-bit sections. This means that if you have an 8 position Relay Rack, then it will have either all INPUT or all OUTPUT type of modules which can be either AC or DC type. So if you need both INPUT and OUTPUT modules, you would need two 8 position Relay Racks - or a 24 position Relay Rack where the INPUT and OUTPUT modules are installed in groups of 8.

The following picture shows a comparison of the Relay Racks:

Upper Left:    24 Position Relay Rack for Mini Modules
Upper Right:  Two 8 Position Relay Racks for Standard Modules
Bottom:         24 Position Relay Rack for Standard Modules

Each of the Relay Racks has a 50position header connector which is used with a ribbon cable to connect to the appropriate connector on the Scientific Solutions product, i.e. BaseBoard PCI, LabMaster DMA, etc.  The Solid State Relay Modules plug into the racks as shown in the picture.  Associated with each module is two screw terminals that are used to connect to your AC or DC load.  Note that in the picture the same type of module (INPUT or OUTPUT) is used for each 8-position section.  This means that an 8position rack can use all INPUT or OUPUT, but cannot mix.  So if you need to use INPUT and OUPUT modules simultaneously you would need at least two of the 8-position racks or a rack with more positions such as a 24 position version.

The Relay Racks and Solid State Modules are normally used with Scientific Solutions BaseBoard/PCI product.  On the front of the BaseBoard/PCI are four connections, with each connector providing 24 digital I/O signals.  Each connection can connect to a single Relay Rack.  So if you wanted to use two of the 8-position racks, you would use two of the connections on the front of the BaseBoard/PCI.  The 24 position rack would connect to one of the BaseBoard/PCI front-panel connectors.

Picture	Part Number	Description	Module Type	Size
	0381013	Relay Rack, 8 Module Position	Standard	8" x 3.5" (203.2mm x 88.9mm)
	0381014	Relay Rack 24 Module Position	Standard	18.75" x 4.5" (476.3mm x 114.3mm)
	0381015	Relay Rack 24 Module Position	Mini	8" x 6" (203.2mm x 152.4mm)