EB3N Safety Relay Barriers
Build a safety system in an explosive atmosphere.
• Ensures explosion protection safety and machine safety in an explosive
atmosphere.
• Machine safety system can be built in compliance with ISO13849-1 Category
4, Performance level e.
• Safety input devices applicable in any explosive gas and hazardous areas are
available.
• Available with auxiliary inputs (5 points) used to monitor the operating status
of safety input devices.
• A wide variety of Japan TIIS-rated emergency stop switches and interlock
switches are available.
• Global usage
Explosion protection: Global: PTB (IEC Ex), Europe: PTB (ATEX), USA: UL
Japan (TIIS), China (Ex-CCC)
Machine safety:
TÜV Rheinland
• No grounding required.
Explosion
Protection
Safety relay barrier [Exia] II C
Switch (EB9Z-A)
Exia II CT6
Switch (EB9Z-A1)
Exia II BT6
Safety
Performance
Performance level e
Category 4
Safety Relay Barriers
Safety Input Points Safety Output
Points
Auxiliary Input Points
(Note 1)
Auxiliary Output Points
(Relay Output)
Reset (Start)
(Note 2, Note 3)
Part No.
2
2NO
Without
Without
Auto reset (Auto start)
EB3N-A2ND
Manual reset (Manual start)
EB3N-M2ND
2
2NO
5 (1 common)
5NO (1 common)
Auto reset (Auto start)
EB3N-A2R5D
Manual reset (Manual start)
EB3N-M2R5D
Note 1: A maximum of five monitor contacts from safety input devices can be connected to the auxiliary input terminals. In addition, non-safety input devices can also be connected to the
auxiliary input terminals.
Note 2: On auto reset (auto start) models, when the safety condition is met (two safety inputs are both on), safety outputs are turned on automatically.
Connect the reset (start) input terminals Y1 and Y2 together except for the following cases:
When connecting a contactor or force guided relay to the safety output of the EB3N, connect the NC contacts of the contactor or force guided relay to the reset (start) input terminals
Y1 and Y2 of the EB3N for use as a backcheck input signal.
Note 3: On manual reset (manual start) models, while the safety condition is met (two safety inputs are both on), safety outputs are turned on at the falling edge of the reset switch (start
switch) signal (OFF ON OFF) (start off check).
Manual reset (manual start) models have a monitoring function of reset switch contacts (detection of welded contacts). Use NO contacts of a momentary switch for the reset (start)
input. When connecting a contactor or force guided relay to the safety output of the EB3N, connect the NC contacts of the contactor or force guided relay to the reset (start) input
terminals Y1 and Y2 of the EB3N for use as a backcheck input signal.
Selection Guide
1. Selecting the reset (start) function
Auto reset (auto start):
Select this model when connecting safety control devices, such as safety relay modules or safety controllers, to the EB3N safety outputs to set up a safety
system, using the reset (start) function of the safety control device.
Select this model when connecting contactors or force guided relays to the EB3N safety outputs to set up a safety system, and a risk assessment on the entire
system has not found any safety problem in using auto reset (auto start).
Manual reset (manual start): Select this model when connecting contactors or force guided relays to the EB3N safety outputs to set up a safety system, and a risk assessment on the entire
system has found that manual reset (manual start) is necessary.
2. Selecting the auxiliary outputs
Without auxiliary outputs: Select this model when the operating status of safety input devices are not monitored.
With auxiliary outputs:
Select this model when the operating status of safety input devices are monitored or when non-safety input devices are also connected.
General Specifications
Rated Power Voltage
24V DC
Power Voltage Range
20.4 to 26.4V DC
Operating Temperature
–20 to +60°C (no freezing)
UL: –20 to +40°C
(no freezing)
Operating Humidity
45 to 85% RH
(no condensation)
Power
Consumption
Without auxiliary output
5.5W maximum
With auxiliary output
7.0W maximum
Safety
Output
Contacts
13-14,
23-24
2NO
Rated Load
Resistive
30V DC, 1A
Inductive
DC-13, 24V, 1A
Response
(rated voltage)
Turn on
100 ms maximum
Turn off
20 ms maximum
Auxiliary
Output
Contacts
A* - C1
5NO/1 common
Rated Load
Resistive
24V DC, 3A,
common terminal 5A max.
Response
(rated voltage)
Turn on
15 ms maximum
Turn off
10 ms maximum
Mounting
DIN rail or panel mounting
*: Channel Nos. 1 to 5
Explosion-Protection Specifications
Explosion Protection
[Exia] II C
Non-intrinsically Safe Circuit Maximum Voltage
(Um)
250V (UL: 125V)
Intrinsically Safe Circuit Maximum Voltage (Uo)
13.2V
Intrinsically Safe Circuit Maximum Current (Io)
227.2 mA
Intrinsically Safe Circuit Maximum Power (Po)
750 mW
Intrinsically Safe Circuit Allowable Capacitance (Co) 0.49 µF (TIIS: 0.28 μF)
Intrinsically Safe Circuit Allowable Inductance (Lo)
0.60 mH
(TIIS: 0.56 mH)
Intrinsically Safe Circuit
Wiring Resistance (Rw)
Safety circuit
(Note 1)
Auxiliary circuit
(Note 2)
Note 1: 10Ω maximum (500m maximum using a 1.25 mm2 cable)
Note 2: 600/(N+1)Ω maximum, where N = the number of common channels
Safety Specifications
Category
4
Performance Level (PL)
e
Mean Time to Dangerous Failure (MTTFd)
100 years
Diagnostic Range
99% minimum
Calculation conditions for MTTFd
t
cycle
: Mean operation cycle = 1 hour
h
op
: Mean operation hours per day = 24 hours
d
op
: Mean operation days per year = 365 days
Note: When t
cycle
is shorter than 1 hour, MTTFd
will decrease.
1
EB3N
Safety Relay Barriers
