GuardPLC™ 1600 Controllers
9
Publication 1753-IN001B-EN-P - March 2004
The supply voltage is connected via a 4-pin connector which accommodates wire
sizes up to 2.5 mm
2
(14 AWG). You only need to connect one wire to L+ and one
wire to L-. Both L+ and L- terminals are internally connected, so you can
daisy-chain 24V dc power from the GuardPLC to other devices in the panel using
the remaining terminal.
Safety-Related Digital Inputs
The controller has 20 digital inputs whose status is indicated via LEDs when the
controller is in RUN mode.
LS+ is a voltage source that provides 24V dc for a group of four dry contact inputs.
There are five groups on the GuardPLC 1600.
ATTENTION
Do not reverse the L+ and L- terminals or damage to the controller
will result. There is no reverse polarity protection.
1
2
3
4
5
6
1
2
3
4
1
L-
L-
L-
L+
L+
L-
DO
2
(2A)
3 4
1
LS+-
LS+
LS+
LS+
LS+
L-
D1
2 3 4
5
6
13
14 15 16 17 18
5
L-
D1
6 7 8
19
20 21 22 23 24
9
L-
D1
10 11 12
25
26 27 28 29 30
13
L-
D1
14 15 16
31
32 33 34 35 36
17
L-
D1
18 19 20
37
38 39 40 41 42
19
20 21 22 23 24
13
14 15 16 23 24
25
26 27 28 29 30
31
32 33 34 35 36
37
38 39 40 41 42
7
8
9
10 11 12
7
8
9
10
5
L-
L-
DO
6
(2A)
7 8
11 12
COMM1
MODBUS
RS-485
24V DC
COMM2
COMM3
RUN
24 V DC
GuardPLC Ethernet
10/100 BaseT
PROG
ERROR
FAULT
FORCE
BL
OSL
PROFIBUS
3
(—)
4
(—)
3
(—)
4
(—)
1753-L28BBBM
20 DC Inputs
8 DC Outputs
1
LS+-
L-
D1
2 3 4
13
14 15 16 17 18
13
14 15 16 23 24
L-
L-
L+
L+
24V DC
24V dc
Power
Supply
COM
+
Connection of Voltage Supply to
Input Device
