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6
SRC-4 Installation and Operation Manual
INSTALLATION
Relay Outputs:
Each of the four relays is supplied with SPDT (form C) dry contacts. External
equipment to be controlled should be connected to the terminals labeled K1NO,
K1CM, K1NC, K2NO, K2CM, K2NC, K3NO, K3CM, K3NC, K4NO, K4CM,
K4NC. The four red LEDs on the front panel indicate which relays are active.
NOTE: If mechanical latching relays are required, we suggest the Broadcast
Tools LR-5 or LR-5 Plus (4PDT & SPST) mechanical latching relay.
Relay terminal block connection layout
(Top Row, TB2)
(Bottom Row, TB2)
RS-232 Serial Connection
Connect one end of the reverse modular cable to the RJ11 jack on the rear panel of
the product and the other end to the RJ11 to the jack on the “S9” 9-pin female D-sub
adapter. Connect the 9-pin female D-sub “S9” adapter to the COM port of the con-
trolling PC/device. Note: An optional USB to RS-232 adapter cable may be
required if your PC isn’t equipped with a RS-232 COM port. The default protocol is
as follows: 9600, N, 8, 1 (auto-detect for baud rate is selectable.)
K1
K1
NC
CM
K1
K2
NO
NC
K2
K2
CM
NO
K3 K3
NC
CM
K3
K4
NO
NC
K4
K4
CM
NO
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product updates and
additional information.
RJ-11
Adapter
Pin
DB-9 Female
Pin #
Function Name
(Product Point of view)
4
3
RS-232 Receive
3
2
RS-232 Transmit
2
5
Ground
Modular Jack
Pin Numbers
