Cut Sheet

V7-T4-34 Volume 7—Logic Control, Operator Interface and Connectivity Solutions CA08100008E—February 2014 www.eaton.com
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4.2
PLC, I/O and Communications Products
XC Series Programmable Logic Controllers
Technical Data and Specifications
XC121 Compact PLC
Description Unit XC-CPU121-2C256K
General
Standards IEC/EN 61131-2; EN 50178
Ambient temperature °F (°C) 32° to 131° (0° to 55°)
Storage °F (°C) –13° to 158° (–25° to 70°)
Mounting position Horizontal
Relative humidity, noncondensing (IEC/EN 60068-2-30) % 10–95
Air pressure (in operation) hPa 795–1080
Vibration resistance Frequency 5–9 Hz; 3.5 mm amplitude
9–150 Hz; 1.0g constant acceleration
Mechanical shock resistance 15g/11 ms
Overvoltage category II
Pollution degree 2
Degree of protection IP20
Rated insulation voltage (U
i
)V500
Emitted interference EN 61000-6-4
Interference immunity EN 61000-6-2
Backup time At least 72 hours
Weight kg 0.15
Electromagnetic Compatibility (EMC) Refer to Page V7-T4-49
Connections
Supply voltage
Connection type —
Terminal capacity mm
2
0.14–1 (AWG28-18)
COM1 interface
Connection type RJ45
COM2, CAN1, CAN2 interfaces
Connection type Spring-loaded terminal block, 6-pole
Terminal capacity mm² 0.14–0.5 (AWG28-20)
Power Supply
Input voltage Vdc 24
Permissible range Vdc 20.4–28.8
Input power W Max. 1.44
Input current mA 60
Ripple %
<
5
Maximum heat dissipation (without local I/O) (P
v
)W6
Overvoltage protection Yes
Protection against polarity reversal Yes
Inrush current x I
n
No limitation
(limited only by upstream 24 Vdc power supply unit)
Supply failure bridging
Duration of power failure ms 10
Repetition rate s 1
External supply filter Part No.: XT-FIL-1, Refer to Page V7-T4-32
Memory
Program code/program data kByte 256/244
Marker/input/output/retain data kByte 16/4/4/8
Cycle time for 1k of instructions (bits, bytes) ms <0.3