SR-12AC-R
Power supply: AC 110V-240V
Input: 8 DI(AC)
Output: 4 Relay
Ethernet
Modbus RTU/ASCII, Modbus TCP
SR-12AC-R is a 12-point smart relay with 8 AC inputs, 4 relay outputs and built-in Ethernet — an economical drop-in replacement for timer and contactor stacks in HVAC and control panels.
GENERAL SPECIFICATIONS
Timers : 512
Counters: 512
Function Blocks: 512
Operation temp.: -20℃-+55℃
Storage : -40℃-+70℃
Protection: IP20 (Non-waterproof)
RTC accuracy: MAX ±2S/day
RTC Backup at 25 °C: 20 days
Program and settings Backup:10 years
Data Power-off retentivity: 10 years
Dimensions : 72*90*61 (Unit, mm）
Certificate : CE
Installation : 35mm-DIN rail or screw for installation
Modify parameters via keypad LCD: yes
Supported programming language: FBD & Ladder
Expansion capacity: 3 modules (SR-E)
Password protection: 4-digit number password protection or disable program upload function
Communication interface: 1 RS485 port(COM1 external -- SR-RS485)，1Ethernet port(10M)
Communication protocol: Modbus RTU, Modbus TCP
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Technical Index |
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Power supply: |
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Nominal voltage |
AC110V-240V |
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Operating limits |
AC85 - 265 V |
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The main frequency range |
47-63Hz |
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Max. absorbed power |
60mA (85V ac); 50mA (265V ac) |
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Surge Immunity |
1780V AC |
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Protection against polarity inversions |
Yes |
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Input parameters: |
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Input No |
8 (I1-I8) |
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Digital input |
8 (I1-I8) |
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Analogue input |
None |
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Input voltage |
AC110-240V |
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Input signal0 |
AC0-40V；<0.03mA |
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Input signal1 |
AC79-240V; >0.06mA |
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Input Response Time |
Delay time at 0 to 1： 120V AC: Typ. 30 ms 240V AC: Typ. 20 ms Delay time at 1 to 0： 120V AC: Typ. 130 ms 240V AC: Typ. 120 ms |
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Maximum counting frequency |
Typ. 2Hz |
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Sensor type |
Contact or 3-wire PNP |
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Isolation between power supply and inputs |
None |
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Isolation between inputs |
None |
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Protection against polarity inversions |
Yes |
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Output parameters: |
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Output No. |
4 (Q1-Q4) |
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Output type |
Relay output |
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Safety certified load (resistive) |
10A,250V AC |
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Min switching load |
6V 1A |
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Electrical endurance (360ops/h) |
10 5 (at room temperature) |
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Mechanical endurance 10,800ops/h |
10 7 (at room temperature) |
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Response time |
Operate Time: 15 mSec. Max. Release Time: 10 mSec. Max. |
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Built-in protections |
Against short-circuits: None Against over-voltages and overloads: None |
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Switch frequency: |
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Mechanism |
10Hz |
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Resistor/light load |
2Hz |
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Sensitive load |
0.5Hz |
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Other parameters: |
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Weight |
210.7g / 247.2g(packaging) |
Installation Dimensions & Wiring Diagram
Related Applications
This controller is a common fit for the machines below. Read the application case for the hardware and control logic used:
Packaging Machine Control
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