ALLEN-BRADLEY 1754

Safety PLCs
GuardPLC 1200 Packaged Safety Controller
1754–L28BBB
Specifications
Number of safety-related
digital inputs
Nominal Input Voltage
On-State Voltage
On-State Current
Off-State Voltage
Off-State Current
Number of safety-related
digital outputs
Output Voltage Range
Output Current
The GuardPLC 1200 is a safety-related compact Programmable
Electronic System (PES), which is designed in accordance with IEC
61131. Despite its small size, it complies with the requirements for a
control system with the safety integrity level (SIL 3) according
IEC 61508.
The GuardPLC 1200 is designed for smaller applications that
require functional safety and that can be serviced with a fixed
number of I/O points. The compact size of the GuardPLC 1200
combined with DIN rail mounting allows deployment even under
cramped space conditions.
The GuardPLC 1200 includes a power supply, CPU, Watchdog, 20
digital inputs, 8 digital outputs plus 2 counters and communication
ports, all incorporated in a rugged plastic housing.
Typical Applications
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Perimeter guarding for Robot/weld cells
Perimeter guarding for Packaging Machines
Entertainment industry (ride control and ski lift control)
Burner Management
Press Controls
Features
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Rugged plastic housing
DIN rail mounting
I/O self test
30 I/O points
24V digital I/O
Multiple I/O test points
Certified by TÜV for use in applications to SIL 3 according to
IEC 61508; EN 954–1, Category 4
• Programmed with RSLogix Guard Software
• RS–232 port for ASCII communication (read only)
• Ethernet port for programming, configuration and Peer-to-Peer
8-6
Number of safety-related
counters
Inputs per counter
Counter Resolution
Input Frequency
Power Supply Voltage
Power Rating
Ambient Temperature
(Operating)
Storage Temperature
Operating Humidity
Shock
Vibration
Dimensions (WxHxD)
Weight
20 (not electrically isolated)
24V DC
10-30V DC
2mA @ 10V DC, 13mA @ 30V DC
5V DC (maximum)
1.5mA per channel (maximum)
4mA per channel (minimum)
8 (not electrically isolated)
18.4 to 26.8 V DC
Channels 1 through 6: 0.5A per channel
Channels 7 & 8: 2A per channel
2
3 (Input A, Direction, Gate/Reset)
24 Bit
100 kHz (maximum) in counter modes
24V DC(20 / -15%), ≤ 15% ripple
8A (maximum)
0°C to 60°C (32°F to 140°F)
-40°C to 85°C (-40°F to 185°F)
5 to 95% (without condensation)
Operating: 30g non operating: 50g
Operating: 2g @ 10 to 500Hz
90 x 160 x 87mm
(3.54 x 6.29 x 3.42in)
0.68 kg