Synrad 48 Series - DB9 Connections; Figure 3-9 Factory-Installed DB9 Jumper Plug Wiring; Table 3-3 Remote Keyswitch and Remote Interlock Signal

technical reference
314
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
DB9 connections
Series 48 lasers are equipped with a female DB9 connector mounted to the sidewall of the laser. This
connector provides the user with a convenient method for monitoring fault conditions (over tempera-
ture, control/RF circuitry failure) and adds remote interlock, remote keyswitch (relay or switch), message
output, and remote LED indicator capability. DB9 pin assignments and functions are fully described in
Table 3-4 on the following page.
A factory-installed jumper plug is attached to the DB9 Connector on each laser to enable normal opera-
tion. Two jumpers (see Figure 3-9) are wired to the plug. One jumper between pins 6 and 7 closes the
Remote Keyswitch function, and the other jumper between pins 3 and 4 closes the Remote Interlock. If this
jumper plug is removed, it is essential that pin 3 be jumpered to pin 4 (or pin 2) or be connected to
external “remote interlock” circuitry in order to enable lasing. To take advantage of the DB9 functions
described in Table 3-4, you must manufacture a connecting cable and configure DB9 connections for
proper operation in your integrated system. A spare DB9 male connector and cover is included with each
laser to facilitate easy cable manufacture.
Note: On lasers manufactured as OEM (-S) version lasers, i.e. without a Keyswitch, the Remote Inter-
lock function is bypassed internally. For OEM customers wishing to access the Remote Interlock
feature via the DB9 connector, please consult the factory for details.
REMOTE
KEYSWITCH JUMPER
12 34 5
6789
REMOTE INTERLOCK
JUMPER
Figure 3-9 Factory-installed DB9 jumper plug wiring
Table 3-3 provides “dry circuit” (zero voltage) specifications for the Remote Keyswitch signal, pin 6 and
pin 7 and the Remote Interlock signal on pin 3.
Table 3-3 Remote Keyswitch and Remote Interlock signal specifications
Signal State Specification
ON
(Contact Closed) < 10 Ohms
OFF
(Open Circuit) > 100 kOhms
Contact rating = 50 VDC, < 2 mA minimum (dry circuit)