Page 16 of 126
198-0853-02 Rev F
5.3. Output Power Connections
Located at the rear of the LT1200X Series are two output bus-bar connectors which are used to
connect to the bath. Make sure the connections to the bus-bars are tight to reduce heating.
Loose connections to the bus-bars will damage the power supply.
5.4. Inhibit Signal Connection
When the inhibit input is active
the power supply output is disabled and the front panel “inhibit”
LED illuminates. The inhibit signal can be used for a safety interlock or as a remote
operate/standby control. The inhibit signal can be a switch closure or a voltage signal input
depending on how the inhibit terminals are wired (see the diagram below). If the inhibit signal is
not used pins 1 and 3 must be connected with a jumper wire to enable power supply operation.
For details on how to use the inhibit input for remote operate/standby control see
6.3.6.Remote
Operate/Standby Control (Digital Input)
and
8.0.Remote Operate/Standby Control
.
5.5. Serial Host Port Connections
The serial host port can be used to monitor and/or control the LT power supply using the ASCII
Host Protocol (See
7.0.Remote Host Control
). The serial host port supports a half duplex RS485
interface. Multiple LT power supplies can be connected to a single RS485 bus (multi-drop). Each
device on the RS485 bus is individually addressed using the ASCII Host Protocol. If an RS232
device (such as a PC) will be connected to the LT host port then an RS232 to RS485 converter
module will be required (not included).
1
5
9
6
RS485 Connections
1 nc
2 nc
3 nc
4 RS485 Data A
5 nc
6 nc
7 nc
8 RS485 Common
9 RS485 Data B
DB9 Female Connector
on Back of Unit
1 2 3
Open to Inhibit/Standby
Inhibit Connector
Signals
1 Inhibit/Standby
w/ Open
2 Inhibit/Standby
w/ Close
3 Common
1 2 3
Close to Inhibit/Standby
External Common
External 5-15VDC
Close to Inhibit
Connection
Method
Inhibit Signal Connection Diagram
Open to Inhibit
Connection
Method
Inhibit Connector
Jumper 1 to 3