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KT-400 Expansion Module 8-Relay with SPI Cable Install Sheet
1. Introduction
The KT-MOD-REL8 is an 8-relay outputs expansion module used
as general relays or elevator control outputs.
The module supports daisy chaining which can add up to 32 KT-
MOD-REL8 modules for a total of 256 external relays per KT-400
controller. You can mix relays and outputs in the same SPI group,
up to 256 outputs.
Note 1: The KT-400 SPI port maximum current draw, when the
12V AUX terminals are not used, is 500 mA.
Note 2: External power supply (12 VDC, 2 Amps) is required
when the total current draw exceeds 500mA on the SPI Port.
Note 3: There are already 4 relays available on the KT-400.
Make sure to check the relays number assignments to prevent
redundancy unless it has been planned on purpose.
2. Specifications
•Maximum Current Draw: up to 330 mA per module
•Each relay supports the 2 conditions, NO (Normally Open)
and NC (Normally Closed), the C (Common) terminal is +12
VDC
•Each relay has its own LED to indicate status, ON for active
•Eight (8) programmable relay contacts rated 30 VDC, 3 A
•Can be used for elevator control
•Can be mixed with output module KT-MOD-OUT16 in the
same group
•Operating Temperature: -10C to +55C
•Maximum Humidity: 93% (non condensing)
•IP Class 3X, IK Rating 04 (when mounted in Kantech
cabinet)
3. Installing the KT-MOD-REL8 Module
3.1. Unpacking
The KT-MOD-REL8 package includes the following parts:
•One (1) module - 14 cm x 8 cm (5.7 in x 3.25 in)
•One (1) SPI cable with 1 SPI connector 41 cm (16 in)
•Four (4) plastic standoffs
•Two (2) installation sheets, English and French
3.2. Mounting
The KT-MOD-REL8 can be installed inside a compatible cabinet
(KT-MOD-CAB or KT-400) or mounted in a dry and secure
location at less than 1 m (3 ft) from the KT-400.
Perform the following steps to mount the unit:
1. Press the four (4) plastic standoffs through the mounting
holes of the cabinet,
2. Secure the cabinet to the wall in the desired location. Use
appropriate wall anchors when securing the cabinet to
drywall, plaster, concrete, brick or other surfaces,
3. Press the module into the plastic standoffs to secure the
module to the cabinet.
3.3. Installation and Wiring
Before beginning to wire the unit, ensure that all power (AC
transformer and battery) is disconnected from the KT-400.
Perform the following steps to complete wiring:
1. Connect the 6-pin SPI connector to:
the KT-400 SPI port, or
the SPI OUT of the previous output module (KT-MOD-
REL8 and KT-MOD-OUT16 only), or
the SPI EXP of the 1st input module KT-MOD-INP16
connected to the KT-400 SPI port.
2. Connect the six SPI wires (blue (BLU), white (WHT), green
(GRN), yellow (YEL), black (BLK) and red (RED)) to the SPI
IN (TB1) terminals.
3. Connect the 6-pin SPI connector from the SPI OUT to the
next output module (KT-MOD-REL8 and KT-MOD-OUT16
only).
4. Complete all output wiring.
