21
2123622-04-06/19 (translation of the original operating instructions)
Operating Instructions Safety Systems
MGB-L..B-PN.-… (PROFINET) and With Expanded Data Structure Type C
EN
12.1. Notes about
Important!
Ì
For use and operation as per the
requirements
1)
, a power supply with the feature “for use in
class 2 circuits” must be used. The same requirement applies to the safety outputs. Alternative
solutions must comply with the following requirements:
a) Electrically isolated power supply unit with a max. open-circuit voltage of 30 V/DC and a
limited current of max. 8 A.
b) Electrically isolated power supply unit in combination with fuse as per UL248. This fuse
should be designed for max. 3.3 A and should be integrated into the 30 V DC voltage section.
Ì
The mounting of conduits directly on the MGB is not allowed. Cables are only allowed to be
connected via suitable cable glands. For this purpose use EUCHNER cable gland of type EKP-
M20/06U. Equivalent cable glands can be used if they are UL-listed (QCRV) and are suitable for the
related cable diameter (22 AWG – 17 AWG).
1) Note on the scope of the UL approval: Only for applications as per NFPA 79 (Industrial Machinery).
The devices have been tested as per the requirements of UL508 (protection against electric shock and fire).
12.2. Connections on bus module
The bus module includes the PROFINET connections (X3 and X4) and the power supply connections (X1 and X2). Connection
is performed via push-pull plugs according to IEC 61076-3-117, variant 14.
The bus module includes a PROFINET RT switch for Ethernet connection.
12.2.1. Terminal assignment for version with push-pull plugs
X1
X2 X3
(PN2)
X4
(PN1)
1 2 3 4 5
1
8 1
8 1
2345
1L+ 2L+
1L+ 2L+
RJ45
Pin
Description
X3.1 Receive Data RD+
X3.2 Receive Data RD-
X3.3 Transmit Data TD+
X3.4 n.c.
X3.5 n.c.
X3.6 Transmit Data TD-
X3.7 n.c.
X3.8 n.c.
Pin
Description
X4.1 Receive Data RD+
X4.2 Receive Data RD-
X4.3 Transmit Data TD+
X4.4 n.c.
X4.5 n.c.
X4.6 Transmit Data TD-
X4.7 n.c.
X4.8 n.c.
Pin
Description
X1.1 L1 operating voltage DC 24 V
X1.2 N1 operating voltage 0 V
X1.3 L2 auxiliary voltage* DC 24 V
X1.4 N2 auxiliary voltage* 0 V
X1.5 Function earth
* The auxiliary voltage is not required for the MGB
system
Pin
Description
X2.1 L1 operating voltage DC 24 V
X2.2 N1 operating voltage 0 V
X2.3 L2 auxiliary voltage* DC 24 V
X2.4 N2 auxiliary voltage* 0 V
X2.5 Function earth
