240D45 OPTO 22, 240D45 Datasheet - Page 5

• Manufacturer Part Number: 240D45
• Description: SSR, PANEL MOUNT, 280VAC, 32VDC, 45A
• Manufacturer: OPTO 22

Specifications of 240D45

• Control Voltage Range: 3VDC To 32VDC
• Operating Voltage Range: 24VAC To 280VAC
• Load Current: 45A
• Isolation Voltage: 4000Vrms
• Control Voltage Type: DC
• Relay Terminals: Screw
• Peak Surge Current: 650A
• Brand/series: DC Series
• Control Signal Range: 3 VDC (Pick-up), 1 VDC (Drop-out)
• Current, Rating: 45 A
• Function: Power
• Mounting Type: PCB
• Relay Type: Solid State
• Standards: UL, CSA, CE
• Voltage, Control: 240 VAC
• Control Voltage Max: 32V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Solid-State Relays
Applications: Tips (cont.)
Transformer Loads
Careful consideration should be given to the selection of the proper
SSR for driving a given transformer. Transformers are driven from
positive saturation of the iron core to negative saturation of the core
each half cycle of the alternating voltage. Large inrush currents can
occur during the first half cycle of line voltage if a zero-voltage SSR
happens to turn on during the positive half cycle of voltage when
the core is already in positive saturation. Inrush currents greater
than 10 times rated transformer current can easily occur. The
following table provides a guide for selecting the proper SSR for a
given transformer rating.
P or MP 120D2
120D3
P or MP 120D4
120D10 or 120A10
120D25 or 120A25
120D45
P or MP240D2
120D3
P or MP240D4
Z120D10
7240D10
240D10 or 240A10
240D25 or 240A25
240D45
480D10-12
480D15-12
SSR MODEL
SSR MODEL
120-Volt Transformers
240-Volt Transformers
480-Volt Transformers
TRANSFORMER
TRANSFORMER
5-Amp Primary
5-Amp Primary
500 VA
250 VA
500 VA
200 VA
200 VA
500 VA
100 VA
100 VA
1 KVA
2 KVA
1 KVA
1 KVA
2 KVA
4 KVA
Solenoid Valve and Contactor Loads
All Opto 22 SSRs are designed to drive inductive loads such as
solenoid valves and electromechanical contactors. The built-in
snubber in each SSR assures proper operation into inductive loads.
The following table is a guide in selecting an SSR to drive a solenoid
or contactor.
Control Current Calculation
All Opto 22 DC-controlled SSRs have a control circuit consisting of
1000 ohms in series with an LED. Since 3 volts is required to turn on
any SSR, the maximum current required is (3 volt - 1 volt) divided
by 1000 ohms, which equals 2.0 mA. The 1 volt is subtracted from
the 3 volt signal because 1 volt is dropped across the LED. For higher
control voltages, an external resistor can be added in series with the
control voltage to limit the control current. To limit the control
current to 2 mA, calculate the external resistor R
where E
The DC control voltage range is 3–32 VDC. To calculate the control
current for any voltage within the 3–32 VDC range, use the formula:
C
= the control voltage.
SSR CURRENT
SSR CURRENT
RATING
RATING
2-Amp
4-Amp
2-Amp
4-Amp
120-Volt Coils
240-Volt Coils
SOLENOID
SOLENOID
1-Amp
3-Amp
1-Amp
3-Amp
CONTACTOR
CONTACTOR
NEMA Size 4
NEMA Size 7
NEMA Size 7
NEMA Size 7
C
= 500 (E
C
- 3)
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