GE Digital EP-1901, EP-1902, EP-1922 Data sheet
RSTI-EP Slice I/O
Module Status
LED
Safety Circuit 1
LED
Connector
Blank
Connector
Block
Manual Start
Circuit
Connectors
Autostart
Circuit
Connectors
NC
(Not Connected)
OSSD
24 V DC
Ground
GE provides 3 varients of RSTi-EP safe feed modules EP 1901: one safe input,
GFK-2968A Safe Feed-input Modules
December 2015 EP-1901, EP-1902, EP-1922
EP 1902: two safe inputs and EP 1922: two safe inputs, with delayed
disconnection, which are intended for connecting safety-related equipment.
The RSTi-EP safe feed-input modules are controlled using contact-based
safety transducers and/or safety transducers with OSSD (Output Signal
Switching Device) inputs. The safety function consists of the safe
EP-1901 Module
disconnection of 24 V outputs, the safe state of which is 24 V switched off
(current path for outputs and the OSSD output is switched off).
All input sensors are independently supplied via separate voltage paths and
report the current machine status to the control unit.
Each RSTi-EP safe feed-input module safely switches off all following
modules that are supplied by the output current path (until the next EP-7641
power module) and thus creates a safety segment. To switch the 24 V OSSD
voltage back on, either an automatic or a manual start can be selected.
• Automatic start: the safe output current path is switched on
immediately after resetting the safety circuit(s).
• Manual start: the output current path is only switched on again if the
start button has been held down for a preset length of time.
With the delay module (EP-1922), switching off can be delayed by a defined
time so that, for example, a machine can be shut down in a controlled
manner. The delay time can be set in four steps between 0 and 60 seconds
(corresponds to stop category 1 as per EN 60204.
The wiring connectors on each module are color coded for ease of wiring.
Refer to the section, Field Wiring for additional information.
The RSTi-EP station is usually installed on a horizontally positioned DIN rail.
Installation on vertically positioned DIN rails is also possible.
Modules should to be allowed to de-energize for a minimum 10 seconds
after power down, prior to starting any maintenance activity.
Refer to the RSTi-EP Slice I/O Functional Safety Module User Manual (GFK-
2956) for additional information.
Refer to the RSTi-EP Power Supply Reference Guide, a software utility
available on PME V9.00, for detailed power-feed requirements.
Module Features
SIL 3 compliant (IEC 62061 and EN ISO 13849-1, category 4, PL e)
OSSD outputs
Emergency-stop circuits
Wire breakage and short-circuit detection
Optional delayed shutdown available
Spring style technology for ease of wiring
DIN rail mounted
Double-click installation for positive indication of correct installation
EP-1922 provides optional shutdown time delay in four steps from 0 to
60 seconds
Supports indirect Firmware update through network adapter using web
server.
© 2015 General Electric Company. All Rights Reserved.
*
Indicates a trademark of General Electric Company and/or its subsidiaries. All other trademarks are the property of their respective
owners.
2 RSTi-EP Slice I/O Safe Feed-input Modules
EP-1901
EP-1902
EP-1922
System Data
Data
Process and diagnostic data depend on the network adapter used.
Interface
RSTi-EP system bus
System bus transfer rate
48 Mbps
Safety-related data
regarding the entire safety chain
DC (Diagnostic Coverage)
96.64%
dangerous)
Hour)
SSF (Safe Failure Fraction)
98.58 %
Tolerance)
Inputs
Safety inputs
1 x 2channel
2 x 2channel
2 x 2channel
Input type
Type 3 as per IEC 61131-2
Inputs for start function
2 (manual start and autostart)
Input type
Type 3 as per IEC 61131-2
Outputs
Safety output (OSSD)
1
Output current
8 A (not for capacitive load)
(see below)
Turn-off time
< 20 ms
Turn-on time
< 2 s
Output SS1
--
--
1
as per IEC 61131-2
fuse (see below)
Auxiliary outputs
2 x 2
3 x 2
3 x 2
Output current
max. 10 A (only to support the inputs dedicated inputs)
Diagnosis
Module diagnosis
Yes
Individual channel diagnosis
Yes
GFK-2968A
Ordering Information
Module Description
EP-1901 1 Safe Feed-Input, 24 VDC
EP-1902 2 Safe Feed-Inputs, 24 VDC
EP-1922 2 Safe Feed-Inputs, 24 VDC, Programmable Delay
Specifications
Achievable safety level
MTTFd (Mean Time To Failure
PFH (Probability of Failure per
HFT (Hardware Fault
Overload protection
SIL3 (IEC 61508), SIL CL3 (IEC 62061), PLe and Cat. 4 (DIN EN ISO 13849-1),
> 100 years
6.27 x 10-9 1/h
1
Excess temperature proof and overload-proof, short circuit proof with external fuse
Output current
Overload protection
--
--
--
--
0,5 A, overload behaviour
Over-temperature,
Overload and Short Circuit
protection with external
RSTi-EP Slice I/O Safe Feed-input Modules 3
EP-1901
EP-1902
EP-1922
Supply
Supply voltage
20.4V – 28.8V via system bus
External pre-fusing
mandatory: super fast, max. 8 A
Reverse battery protection
Yes
network adapter), typ.
respective power segment)
EP-1901
EP-1902
EP-1922
General data
Operating temperature
-20°C to +60°C (-4 °F to +140 °F)
Storage temperature
-40°C to +85°C (-40 °F to +185 °F)
(operation/transport)
(0.45 in)
Depth
Height
120 mm (4.72 in)
Weight
80 g (2.82 oz)
82 g (2.89 oz)
84 g (2.96 oz)
Product
I
IIN
I
IS
IL
EP-1901
8 mA
45 mA
--
--
x
EP-1902
8 mA
45 mA
--
--
x
EP-1922
8 mA
45mA
--
-
x
I
x
Current consumption from the system current path
Must be included when calculating the power supply
GFK-2968A
Current consumption (IIN in the
power segment of the fieldbus
8 mA
Current consumption (IIN in the
Air humidity
Width
SYS
I
Power consumption from input current path
IN
Power consumption from output current path
I
OUT
Current demand of the connected sensors
I
S
Current demand of the connected actuators
I
L
5% to 95%, noncondensing as per IEC 61131-2
Current Demand for Safe feed-Input Modules
SYS
OUT
45 mA
11.5 mm
76 mm (2.99 in)
For public disclosure
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