Scientific Solutions ^® Inc.

SSR Solid State Relay Modules

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 (on, conducting current).

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.

Module Size: Standard versus Mini

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 newer 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

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)

Size comparison of Standard and Mini Relay Racks
Upper Left: 24 Position Mini Relay Rack (8" x 6" / 203mm x 152mm)
Upper Right: Two 8 Position Standard Relay Racks (ea. 8" x 3.5" / 203mm x 89mm)
Bottom: 24 Position Standard Relay Rack (18.75" x 4.5" / 476mm x 114mm)

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 4 Vdc to 200 Vdc) and have built in spike protection. The 60 Vdc versions are the most common and offer the faster switching times.

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.

Technical Specifications

SSR DC Output specifications

SSR DC Output
Part Number		381010	381006	381021	381017
Package Type		Mini	Standard	Mini	Standard
Output Specifications
Normal State		Normally OPEN	Normally OPEN	Normally OPEN	Normally OPEN
Maximum Load Voltage	Vdc	60	60	200	200
Load Voltage Range	Vdc	3 to 60	3 to 60	4 to 200	4 to 200
Max. On State Voltage Drop	Vdc	1.20	1.20	1.20	1.20
Load Current Range @ 25º C	Amp	0.02 to 3.0	0.02 to 3.5	0.02 to 3.0	0.02 to 3.5
Surge Current max. for 1 Sec.	A	5	5	5	5
Derating (mA per ºC		33 Above 25º C	33 Above 25º C	33 Above 25º C	33 Above 25º C
Max. Off-state Leakage @ 60Vdc Load	mA	1.5	1.5	0.01	0.01
Maximum Turn-on Time	usec	20	20	75	75
Maximum Turn-off Time	usec	50	50	750	750
Clamping Voltage (maximum)	Vdc	80	80	360	360
Input Specifications
Nominal Logic Voltage	Vdc	5	5	5	5
Logic Voltage Range	Vdc	2.5 to 10	2.5 to 10	2.5 to 9	2.5 to 9
Typ. Logic Supply Current @ Nominal VCC	mA	10	10	10	10
Max. Logic Supply Current @ Nominal VCC	mA	14	14	18	18
Maximum Reverse Logic Voltage	Vdc	-5	-5	-5	-5
Nominal Logic Input Resistance Rx	Ohm	300	300	220	220
Min. Logic Drop Out Voltage	Vdc	1	1	1	1
General Specifications
Isolation Voltage	Vrms	4000	4000	4000	4000
Typ. Power Dissipation	Watt/Amp	1.0	1.0	1.5	1.5
Input to Output Capacitance (typical)	pF	10	10	10	10
Vibration1	see notes below	20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude
Mechanical Shock2	see notes below	1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine
Storage Temperature	º C	-40 to +125	-40 to +125	-40 to +125	-40 to +125
Operating Temperature	º C	-40 C to +100 C	-40 C to +100 C	-40 C to +100 C	-40 C to +100 C
Transient Power Dissipation		400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)
Package Size	in (mm)	1.7 x 1.00 x 0.40 (43.2 x 25.4 x 10.2)	1.7 x 1.25 x 0.60 (43.2 x 31.8 x 15.2)	1.7 x 1.00 x 0.40 (43.2 x 25.4 x 10.2)	1.7 x 1.25 x 0.60 (43.2 x 31.8 x 15.2)
Package Color		RED	RED	RED	RED

SSR AC Output specifications

SSR AC Output
Part Number		381009	381005	381020	381016
Package Type		Mini	Standard	Mini	Standard
Output Specifications
Normal State		Normally OPEN	Normally OPEN	Normally OPEN	Normally OPEN
Turn On State		Zero-Crossing Turn On	Zero-Crossing Turn On	Zero-Crossing Turn On	Zero-Crossing Turn On
Nominal Load Voltage	Vac	120	120	240	240
Load Voltage Range	Vac	24 to 140	24 to 140	24 to 280	24 to 280
Max. On State Voltage Drop	Vac, max	1.50	1.50	1.50	1.50
Frequency Range	Hz	25 to 70	25 to 70	25 to 70	25 to 70
Load Current Range @ 25º C	Amp	0.02 to 3.0	0.02 to 3.5	0.02 to 3.0	0.02 to 3.5
Surge Current max. for 1 Sec.	A	5	5	5	5
Derating (mA per ºC		33 Above 25º C	33 Above 25º C	33 Above 25º C	33 Above 25º C
Max. Off-state Leakage @ 60Vdc Load	mA	1.5	1.5	0.01	0.01
Maximum Turn-on Time	usec	20	20	75	75
Maximum Turn-off Time	usec	50	50	750	750
Clamping Voltage (maximum)	Vdc	80	80	360	360
Input Specifications
Nominal Logic Voltage	Vdc	5	5	5	5
Logic Voltage Range	Vdc	2.5 to 10	2.5 to 10	2.5 to 9	2.5 to 9
Typ. Logic Supply Current @ Nominal VCC	mA	10	10	10	10
Max. Logic Supply Current @ Nominal VCC	mA	14	14	18	18
Maximum Reverse Logic Voltage	Vdc	-5	-5	-5	-5
Nominal Logic Input Resistance Rx	Ohm	300	300	220	220
Min. Logic Drop Out Voltage	Vdc	1	1	1	1
General Specifications
Isolation Voltage	Vrms	4000	4000	4000	4000
Typ. Power Dissipation	Watt/Amp	1.0	1.0	1.5	1.5
Input to Output Capacitance (typical)	pF	10	10	10	10
Vibration1	see notes below	20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude	20 G's peak or 0.06" double amplitude
Mechanical Shock2	see notes below	1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine	1500 G's 0.5mS half-sine
Storage Temperature	º C	-40 to +125	-40 to +125	-40 to +125	-40 to +125
Operating Temperature	º C	-40 C to +100 C	-40 C to +100 C	-40 C to +100 C	-40 C to +100 C
Transient Power Dissipation		400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)	400 Watts at 1mS (non-Recurring)
Package Size	in (mm)	1.7 x 1.00 x 0.40 (43.2 x 25.4 x 10.2)	1.7 x 1.25 x 0.60 (43.2 x 31.8 x 15.2)	1.7 x 1.00 x 0.40 (43.2 x 25.4 x 10.2)	1.7 x 1.25 x 0.60 (43.2 x 31.8 x 15.2)
Package Color		RED	RED	RED	RED

¹MIL-STD-202, Method 204, 20G. 10-2000Hz or IEC68-2-6, 0.15mm/sec2, 10-150Hz
² MIL-STD-202, Method 213, Condition F, 1500G or IEC68-2-27, 11ms, 15g

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