Data Sheet
I
WWW.CROUZET-AUTOMATION.COM I 03 I em4
Cycle time From 2 ms to 90 ms, default value: 10 ms
Clock data retention 10 years (lithium battery) at 25°C (77°F)
Clock drift Drift < 12 min/year (at 25°C (77°F))
6 s / month (at 25°C (77°F) with user-denable correction of drift).
Synchronizable by network
Timer block accuracy 0.5 % +/- 2 cycle time
Start up time on power up < 3 s base alone, < 1.5 s base + 2 expansions + accessory interface
(USB or Modbus RS485)
Self test Test rmware integrity (checksum memory)
Stability of the internal power supply
Check the conformity of the em4 device conguration with the conguration
in the application program.
Supply
Nominal voltage 24 VDC (-15% / +20%)
Operating limits 20.4 - 28.8 VDC
Immunity from micro power cuts y 1 ms (repetition 20 times)
Max. absorbed power 5W @ 24 VDC, 6.5 W @ 28.8 VDC, - 0.3 W backlight OFF
Protection against polarity inversions Yes
Inputs
Digital and high speed digital inputs 24 VDC - 4 inputs from I1 to I4
Input used as digital input
Input voltage 24 VDC (-15% / +20%)
Input current 1.8 mA @ 20.4 V
2.1 mA @ 24 V
2.5 mA @ 28.8 V
Input impedance 11.6 kΩ
Logic 1 voltage threshold u 15 VDC
Making current at logic state 1 u 1.3 mA
Logic 0 voltage threshold y 10 VDC
Release current at logic state 1 y 0.8 mA
Response time 1 to 2 cycle times
Sensor type Contact or 3-wire PNP
Conforming to IEC/EN 61131-2 Type 1
Input type Resistive
Isolation between power supply and inputs None
Isolation between inputs None
Protection against polarity inversions Yes
Status indicator On LCD screen
Cable length y 100 m
Input used as high speed digital input
Maximum counting frequency 3 channels encoder (I1, I2, I3): 20 kHz*
2 independent counters (I1, I2) (I3, I4) (Cumul, IND, DIR): 2 channels: 40 kHz*,
4 channels: 20 kHz*,
2 independent counters (I1, I2) (I3, I4) (PH, PH2): 2/4 channels: 20 kHz*
4 independent counters (I1, I2, I3, I4) (Up/Down) : 1 channel: 60 kHz*, 2 channels:
40 kHz*, > 2 channels: 20 kHz*
* with a time cycle <= 10 ms and a ton / toff = 50% +/- 5%, level 0 < 2V and level 1 >
20,4V
Other functions 4 chronometers (I1, I2, I3, I4 )
4 tachometers (I1, I2, I3, I4 )
Cable length y 3 m with shielded twisted cable
Digital 24 VDC and analog inputs 12 bits / 28.8 V - potentiometer - 8 inputs from I5 to IC
Input used as digital input
Input voltage 24 VDC (-15% / +20%)
Input current 1.8 mA @ 20.4 V
2.1 mA @ 24 V
2.5 mA @ 28.8 V
Input impedance 11.6 kΩ
Logic 1 voltage threshold u 11 VDC
Making current at logic state 1 u 1 mA