VARISTAR LHX 20
Interfaces
Cooling module 60714-050
www.schroff.biz
20
R2.1, May 10, 2012
6.2 Inputs and outputs on the control board
An overview showing the position of the connectors on the control board is given
in the Appendix.
6.3 Pinout of D-sub 9 socket
RS-232 interface, interface driver galvanically isolated. Status reports are
issued at this interface.
Schroff LHX Ethernet gateway can be connected here. Error codes and
temperatures/speeds can be accessed via Ethernet using SNMP.
6.4 RJ45 socket pinout
Two RJ45 sockets are provided on the control board. Both sockets are RS-485
interfaces, interface drivers are not galvanically isolated. One socket is located
beside the control and display unit. An external control and display unit may be
connected to this (CAT 5 cable, max. cable length 100 m). The display of the
cooling module is connected to the socket inside the module.
Name
Connector/pin
Function
E7
X9: pin 1 / 2
Digital input, potential-free: connection for door contact, alarm signal (buzzer/
horn) - on after 120 s. Time is set in PA0 (P35).
E8
X9: pin 3 / 4
Digital input, potential-free: Water cooler error message (optional)
K2
X10: pin 1 / 2
Relay output (normally open) 8 (1.5) A / 250 V (water cooler enable).
K3
X12: pin 1 / 2 / 3 Relay output (changeover) 8 (1.5) A / 250 V (common fault)
Pin
Signal
2
RxD
3
TxD
5
GND
7
RTS
8
CTS
