Wire the module, Connect the voltage supply, Safety-related digital inputs – Rockwell Automation 1753-IB16 GuardPLC Digital Input Module Installation Instructions User Manual
Page 6: Connection of voltage supply to input device
6 GuardPLC Digital Input Module
Rockwell Automation Publication 1753-IN004C-EN-P - June 2010
Wire the Module
The following sections describe how to connect the voltage supply and connect the inputs and
outputs.
Connect the Voltage Supply
To comply with CE Low Voltage Directives (LVD) and UL restrictions, you must use either a
Safety Extra Low Voltage (SELV), or a Protected Extra Low Voltage (PELV) power supply to
power this module. A SELV supply cannot exceed 30V rms, 42.4V peak, or 60V DC under
normal conditions and under single-fault conditions. A PELV supply has the same rating and is
connected to protected earth.
The supply voltage is connected via a 4-pin connector that accommodates wire sizes up to
2.5 mm
2
(14 AWG). You need to connect only 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 module to
other devices in the panel by using the remaining terminal.
Safety-related Digital Inputs
The module has 16 digital inputs (DI1…DI16) and 4 pulsed test-sources (PO1…PO4) whose
status is indicated via status indicators.
LS+ is a voltage source that provides 24V DC for a group of four dry contact inputs. There are
four groups on the module.
IMPORTANT
Protect the module with a 4 A slow-blow fuse.
ATTENTION: Do not reverse the L+ and L- terminals or damage to the module
will result. There is no reverse polarity protection.
24V DC
Power
Supply
COM
+
L-
L-
L+
L+
24V DC
1
LS+
LS+
LS+
L-
D1
2 3 4
1
2
3 4
5
6
5
L-
D1
6 7 8
9
L-
D1
10 11 12
1
2
3 4
5
6
7 8
9 10 11 12
7 8
9 10 11 12
13 14 15 16 17 18
13 14 15 16 17 18
Connection of Voltage Supply to Input Device