KEPCO KLR Series User Manual - Manual (Page 39)

KLR 091313
2-15/(2-16 Blank)
e. Fault Connections (RELAY_NC, RELAY_COM, RELAY_NO
It is recommended that normally open and normally closed relay signals RELAY_NC (pin 10)
and/or RELAY_NO (pin 2), respectively, be twisted together with RELAY_COM (pin 4) as
needed to eliminate noise pickup. See PAR. 3.2.17.1 to configure internal relay.
f. External Trigger (EXT_TRIG)
External Trigger may be used with the SCPI TRIG commands (see KLR Developer’s Guide)
during digital remote operation. For noise suppression it is recommended that wires from
EXT_TRIG, pin 14 and ground (pin 9, 11, 13, or 15) be twisted together.
2.8 DIGITAL CONNECTIONS
The following paragraphs describe the connections required to use the GPIB, RS 232 [standard
models only] or LAN [E-Series models only] ports for remote control of the unit.
2.8.1 GPIB CONNECTIONS
Your computer must have a GPIB interface card installed. Connect the power supply to the
computer’s GPIB interface card. Use a standard GPIB interface cable at the GPIB port on the
rear panel (See Figure 2-2). Refer to Table 2-3 for GPIB port pin assignments. Refer to PAR.
3.2.12 to change the default GPIB address (6) from the front panel.
2.8.2 RS 232 CONNECTIONS [STANDARD MODELS ONLY]
Communications between KLR, considered data terminal equipment (DTE), and data communi-
cations equipment (DCE), e.g. a modem, requires a patch cable, or one with a pin-for-pin rela-
tionship between terminating connectors. A null modem cable (see Table 1-5) is necessary for
nearly all applications, with the exception of those in which the RXD and TXD line transposition
is accomplished via external hardware (e.g. older Apple MAC computers with D-sub serial port).
See Table 2-4 for RS 232 port pin assignments. Connect the cable to the KLR at the RS 232
port located on the rear panel (See Figure 2-2). Refer to PAR. 3.2.13 to change the default baud
rate (38400) from the front panel.
2.8.3 LAN CONNECTIONS [E-SERIES MODELS ONLY]
Connect the KLR to the LAN via the RJ 45 LAN port located at the rear panel (See Figure 2-2).
Refer to Table 2-5 for LAN port pin assignments. Refer to PAR 3.2.15 to configure the LAN inter-
face from the front panel. Some configuration can also be done through the web interface (see
PAR. 3.3.6.4). Refer to the KLR Developer’s Guide for the associated SCPI commands