Companion Products; Pm 1207 Power Module; Csm 1277 Compact Switch Module; A.9 Companion Products - Siemens SIMATIC S7-1200 Manual

Technical specifications

A.9 Companion products

Table A- 69 RS485 or RS422 connector (female)
Pin Description
1 Logic or communication ground
2 TxD+ Connected for RS422
1
Not used for RS485: Output
3 TxD+ Signal B (RxD/TxD+): Input/Output
4 RTS Request to send (TTL level) Output
2
5 GND Logic or communication ground
Pins 2 and 9 are only used as transmit signals for RS422.
1
The RTS is a TTL level signal and can be used to control another half duplex device based on this signal. It is active
2
when you transmit and is inactive all other times.
A.9

Companion products

A.9.1

PM 1207 power module

The PM 1207 is a power supply module for the SIMATIC S7-1200. It provides the following
features:
● Input 120/230 VAC, output 24 VDC/2.5A
● Order number 6ESP 332-1SH71
For more information about this product and for the product documentation, refer to the
customer support web site (http://www.siemens.com/automation/support-request).
A.9.2

CSM 1277 compact switch module

The CSM1277 is an Industrial Ethernet compact switch module. It can be used to multiply
the Ethernet interface of the S7-1200 to allow simultaneous communication with operator
panels, programming devices, or other controllers. It provides the following features:
● 4 x RJ45 sockets for connecting to Industrial Ethernet
● 3 pole plug in terminal strip for connection of the external 24 VDC supply on top
● LEDs for diagnostics and status display of Industrial Ethernet ports
● Order number 6GK7 277-1AA00-0AA0
For more information about this product and for the product documentation, refer to the
customer support web site (http://www.siemens.com/automation/support-request).
282
Connector Pin
(female)
6 PWR
7
8 TXD-
9 TXD-
SHELL
Description
+5V with 100 ohm series resistor: Output
Not connected
Signal A (RxD/TxD-): Input/Output
Connected for RS422
1
Not used for RS485: Output
Chassis ground
Manual, 11/2011, A5E02486774-04
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