1-800-633-0405
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IDEM SCR31 Series Single/Dual Channel Viper Safety Relays
The Viper Safety Relay series from IDEM are designed with enhanced
LED diagnostics and simplified wiring. Applications include guard door
monitoring, emergency stop devices and sensors. The SCR31 series’
internal logic uses force guided relays to achieve cross monitoring. This
ensures that a single fault does not lead to the loss of the safety function
and that all faults are detected at or before the next safety demand.
Note: Not for use with safety light curtains
Features
• Single or dual channel operation
• Monitored manual or auto start/reset
• Up to 3 safety output contacts and 1 auxiliary output contact
• Easy diagnostics of status via 6 LEDs
• 22.5 mm DIN rail mounting
SCR31 Series Single/Dual Channel Safety Relays
Part Number Price Type Voltage Outputs Connection
SCR31-280002
SCR31-280002-P
$143.00
$184.00 Pluggable terminals
Single/Dual
channel operation
24V AC/DC 3 N0 / 1 NC
SCR31 Series Specifications
Temperature
Altitude
Vibration Resistance
Degree Of Protection
Housing
Weight
Agency Approvals and Standard
Terminal Designation per EN 50 005
Wire Fixing
Nominal Voltage
Voltage Range
Maximum Consumption
Nominal Frequency
Control Voltage
Control Current
Short Circuit Protection
Over Voltage Protection
Electrical Contact Life
Mechanical Life
Contact Type
Operate Delay
Release Delay
Nominal Output Voltage
Thermal Current (Ith)
Short Circuit Strength
Switching Capacity
Switching Frequency
1 x 4 mm² stranded ferruled (isolated) or 2 x 1.5 mm² stranded ferruled (isolated) or 2 x 2.5 mm² solid
AC - 250V, 1500V, 6A, Ohmic 230V, 4A for AC-15; DC - 24V, 30W, 1.25 A, Ohmic
SCR31-280002
Fixed screw terminals
M3.5 terminals with self-lifting wire protection or cage clamp terminals
Internal PTC (Positive Temperature Coefficient resistor)
Internal VDR (Voltage Dependent resistor)
6A / 250VAC 100,000 cycles, 1A / 250VAC 1,000,000 cycles
3 NC positively driven and 1 NO auxiliary contacts
Minimum Contact Fuses - 4A slow blow, 6A fast blow
Category
Performance level
MTTF
DC
Sil CL
Sil
HFT
DC
SFF
PFHd (t-20a)
General Specifications
-20° to +55°C [-4° to +131°F]
< 2,000 meters
Tested to IEC 60068-2-6
IP20
UL 94V-0 Thermoplastic
150g (5.3 oz)
cULus file E258676, CE, TUV
Input Specifications
24V AC/DC
85-110%
2.5 W (24VDC)
50Hz-60Hz
24VDC (S11)
100mA (S11)
Output Specifications
6
10 x 10
100ms
25ms
250VAC
Max. 6A
Max. 360 switching cycles/hr
Safety Data per EN 13849-1
4
Ple
d
avg
142a (High)
99% (High)
Safety Data per IEC/EN 62061, IEC/EN 61508
SIL CL 3
SIL3
1 (Dual channel)
avg
99% (High)
90-99%
3.60E-05
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Safety Electrical Components
tESC-327
1-800-633-0405
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IDEM SCR31 Series Single/Dual Channel
Viper Safety Relays
Dimensions
Applications
mm [in]
LED Diagnostics
When safety relay in operation
Power Power applied to device
Reset Reset circuit is closed
CH1 External switch input 1 closed
CH2 External switch input 2 closed
K1 Internal relay safety ouput
K2 Internal relay safety output
contacts closed
contacts closed
13 23 33 41
A1 S11S21 S22
S CR-31- i
POWER
RESET
CH1
CH2
K1
IDEM
K2
VIPER
S13S10 A2S12
14 24 34 42
Automatic restart mode (single channel) non contact
Auto Reset
Note: A power supply unit with electrical isolation from the mains supply must be connected. External fusing of each safety output contact is necessary, a 4A
slow-blow or 6A (quick action) must be provided.The maximum cabling and connecting resistance of control lines must not be exceed 300 Ohms.
Manual Reset
Contactor Auto Feedback
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Manual restart mode (dual channel) estop
Contactor Manual Feedback
Safety Electrical Components
tESC-328
1-800-633-0405
Safety Products
Warning: Safety products sold by AutomationDirect are Safety components only. The purchaser/installer is
solely responsible for the application of these components and ensuring all necessary steps have been taken
to assure each application and use meets all performance and applicable safety requirements and/or local,
national and/or international safety codes as required by the application. AutomationDirect cannot certify
that our products, used solely or in conjunction with other AutomationDirect or other vendors’ products,
will assure safety for any application. Any person using or applying any products sold by AutomationDirect
is responsible for learning the safety requirements for their individual application and applying them, and
therefore assumes all risks, and accepts full and complete responsibility, for the selection and suitability of
the product for their respective application.
AutomationDirect does not provide design or consulting services, and cannot advise whether any
specific application or use of our products would ensure compliance with the safety requirements for any
application.
For the latest prices, please check AutomationDirect.com.
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Safety Electrical Components
tESC-141
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